Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
648 FNUS55 KBYZ 161909 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 109 PM MDT Sun Aug 16 2026 .DISCUSSION... Isolated to scattered late day showers and thunderstorms are expected through Tuesday, decreasing in coverage for the latter half of the work week. Heavy rain, lightning, and erratic wind gusts are possible with stronger cells. Expect seasonal temps in the 80s through Wednesday, warming to around 90 degrees after midweek. Minimum relative humidity values will be mainly in the 20s and 30s. The exception may be Thursday when some areas see RH readings drop to the upper teens. BT MTZ123-171015- Gallatin National Forest- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......46-56 at 5000 feet...41-51 at 7000 feet. * 24 hr trend.........2 degrees warmer. * Max humidity..........67-72 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph in the evening shifting to the southeast overnight. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...24 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......74-83 at 5000 feet...63-73 at 7000 feet. * 24 hr trend.........Unchanged. * Min humidity..........32-42 percent at 5000 feet...30-40 percent at 7000 feet. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...15 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......48-58 at 5000 feet...44-54 at 7000 feet. * 24 hr trend.........2 degrees warmer. * Max humidity..........62-67 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...29 percent. * CWR...................20 percent. .TUESDAY... * Sky/weather...........Partly sunny. Isolated rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......71-81 at 5000 feet...61-71 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Min humidity..........39-49 percent at 5000 feet...34-44 percent at 7000 feet. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph in the morning shifting to the west in the afternoon. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...30 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 46 to 56. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 48 to 58. Highs 75 to 84. Southwest winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 51 to 61. Highs 80 to 89. Southwest winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Scattered showers. Lows 53 to 63. Highs 82 to 92. Southwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 51 to 61. Highs 79 to 87. .SUNDAY...Mostly sunny. Scattered showers and thunderstorms. Highs 76 to 85. $$ MTZ124-171015- Wheatland County/Sweet Grass County- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......48-53. * 24 hr trend.........Unchanged. * Max humidity..........79-84 percent. * 24 hr trend.........15 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...17 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........3 degrees cooler. * Min humidity..........30-35 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...17 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......50-55. * 24 hr trend.........2 degrees warmer. * Max humidity..........78-83 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......73-78. * 24 hr trend.........4 degrees cooler. * Min humidity..........35-40 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...28 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms. Lows 48 to 53. West winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 49 to 54. Highs 79 to 84. West winds 5 to 15 mph. .THURSDAY...Partly cloudy. Lows 52 to 57. Highs 85 to 90. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Scattered showers. Lows 55 to 60. Highs 85 to 90. Southeast winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 58. Highs 83 to 88. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 82 to 87. $$ MTZ125-171015- Stillwater County- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......52-57. * 24 hr trend.........2 degrees warmer. * Max humidity..........63-68 percent. * 24 hr trend.........18 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...17 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........3 degrees cooler. * Min humidity..........29-34 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming southeast 5 to 10 mph in the afternoon. * Chance of lightning...15 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......54-59. * 24 hr trend.........2 degrees warmer. * Max humidity..........62-67 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...29 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Isolated rain showers in the morning, then numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......73-78. * 24 hr trend.........5 degrees cooler. * Min humidity..........36-41 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming south 5 to 10 mph in the afternoon. * Chance of lightning...32 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 52 to 57. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 54 to 59. Highs 80 to 85. West winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 57 to 62. Highs 86 to 91. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Scattered showers. Lows 59 to 64. Highs 86 to 91. Southeast winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 58 to 63. Highs 84 to 89. .SUNDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 82 to 87. $$ MTZ126-171015- Beartooth Ranger District Custer National Forest- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......53-61 at 5000 feet...46-56 at 7000 feet. * 24 hr trend.........4 degrees warmer. * Max humidity..........57-67 percent at 5000 feet...59-69 percent at 7000 feet. * 24 hr trend.........17 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 15 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...23 percent. * CWR...................Less than 10 percent. .MONDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......74-82 at 5000 feet...65-75 at 7000 feet. * 24 hr trend.........1 degree warmer. * Min humidity..........31-41 percent at 5000 feet...36-46 percent at 7000 feet. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...22 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Cloudy. Scattered showers and thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......55-63 at 5000 feet...47-57 at 7000 feet. * 24 hr trend.........1 degree warmer. * Max humidity..........57-67 percent at 5000 feet...60-70 percent at 7000 feet. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...29 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Mostly cloudy. Scattered rain showers in the morning, then numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......70-78 at 5000 feet...61-71 at 7000 feet. * 24 hr trend.........4 degrees cooler. * Min humidity..........39-49 percent at 5000 feet...46-56 percent at 7000 feet. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...36 percent. * CWR...................40 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 60. West winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 54 to 63. Highs 74 to 82. West winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 57 to 66. Highs 78 to 87. West winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 59 to 68. Highs 81 to 90. West winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 58 to 67. Highs 81 to 90. .SUNDAY...Partly sunny. Scattered showers and thunderstorms. Highs 78 to 87. $$ MTZ127-171015- Golden Valley County/Musselshell county- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......57-62. * 24 hr trend.........2 degrees warmer. * Max humidity..........66-71 percent. * 24 hr trend.........12 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...17 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......74-79. * 24 hr trend.........4 degrees cooler. * Min humidity..........36-41 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...12 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......57-62. * 24 hr trend.........Unchanged. * Max humidity..........68-73 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......70-75. * 24 hr trend.........4 degrees cooler. * Min humidity..........44-49 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...23 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 58 to 63. Highs 78 to 83. West winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 60 to 65. Highs 81 to 86. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 62 to 67. Highs 82 to 87. East winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 62 to 67. Highs 83 to 88. .SUNDAY...Mostly sunny. Isolated showers. Highs 80 to 85. $$ MTZ128-171015- Yellowstone County- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Mostly cloudy. * Min temperature.......57-62. * 24 hr trend.........2 degrees warmer. * Max humidity..........75-80 percent. * 24 hr trend.........6 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...13 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......80-85. * 24 hr trend.........3 degrees cooler. * Min humidity..........34-39 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph in the morning shifting to the north in the afternoon. * Chance of lightning...7 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......58-63. * 24 hr trend.........1 degree warmer. * Max humidity..........73-78 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph in the evening shifting to the west overnight. * Chance of lightning...22 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......76-81. * 24 hr trend.........4 degrees cooler. * Min humidity..........41-46 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...22 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 62. Highs 82 to 87. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 59 to 64. Highs 87 to 92. Northwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Scattered showers. Lows 62 to 67. Highs 88 to 93. Northeast winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 61 to 66. Highs 88 to 93. .SUNDAY...Mostly sunny. Isolated showers. Highs 86 to 91. $$ MTZ129-171015- Crow Indian Reservation/Bighorn Canyon Rec Area- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......56-61 at 5000 feet...54-59 at 7000 feet. * 24 hr trend.........3 degrees warmer. * Max humidity..........58-68 percent at 5000 feet...52-60 percent at 7000 feet. * 24 hr trend.........23 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...4 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......73-83 at 5000 feet...67-74 at 7000 feet. * 24 hr trend.........1 degree warmer. * Min humidity..........28-38 percent at 5000 feet...34-44 percent at 7000 feet. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...8 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......57-62 at 5000 feet...54-59 at 7000 feet. * 24 hr trend.........Unchanged. * Max humidity..........58-68 percent at 5000 feet...55-63 percent at 7000 feet. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...23 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......69-79 at 5000 feet...62-69 at 7000 feet. * 24 hr trend.........5 degrees cooler. * Min humidity..........36-46 percent at 5000 feet...45-55 percent at 7000 feet. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...23 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 60. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 63. Highs 74 to 84. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 59 to 66. Highs 79 to 89. Southeast winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 61 to 68. Highs 80 to 90. East winds 5 to 10 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 62 to 67. Highs 81 to 91. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 78 to 88. $$ MTZ130-171015- Northern Rosebud/Northern Treasure Counties- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......56-61. * 24 hr trend.........3 degrees warmer. * Max humidity..........80-85 percent. * 24 hr trend.........14 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...11 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......83-88. * 24 hr trend.........Unchanged. * Min humidity..........30-35 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...6 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......56-61. * 24 hr trend.........Unchanged. * Max humidity..........81-86 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph in the evening becoming light overnight. * Chance of lightning...18 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......80-85. * 24 hr trend.........3 degrees cooler. * Min humidity..........35-40 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming east 5 to 10 mph in the afternoon. * Chance of lightning...20 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 58. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 56 to 61. Highs 85 to 90. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 58 to 63. Highs 89 to 94. North winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 62 to 67. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 63 to 68. Highs 91 to 96. .SUNDAY...Mostly sunny. Highs 89 to 94. $$ MTZ131-171015- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......54-59. * 24 hr trend.........6 degrees warmer. * Max humidity..........75-80 percent. * 24 hr trend.........16 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...3 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......83-88. * 24 hr trend.........1 degree warmer. * Min humidity..........26-31 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...3 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......55-60. * 24 hr trend.........1 degree warmer. * Max humidity..........76-81 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph in the evening shifting to the west overnight. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...21 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........4 degrees cooler. * Min humidity..........35-40 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...25 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and thunderstorms. Lows 52 to 57. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 54 to 59. Highs 83 to 88. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 56 to 61. Highs 88 to 93. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 61 to 66. Highs 90 to 95. East winds 5 to 10 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 61 to 66. Highs 90 to 95. .SUNDAY...Mostly sunny. Highs 88 to 93. $$ MTZ132-171015- Custer County- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. Scattered showers and thunderstorms in the evening. * Min temperature.......57-62. * 24 hr trend.........4 degrees warmer. * Max humidity..........79-84 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Southeast winds 5 to 10 mph in the evening shifting to the southwest overnight. * Chance of lightning...29 percent. * CWR...................20 percent. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......80-85. * 24 hr trend.........Unchanged. * Min humidity..........33-38 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...4 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy with scattered rain showers. * Min temperature.......56-61. * 24 hr trend.........1 degree cooler. * Max humidity..........77-82 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph in the evening shifting to the southeast overnight. * Chance of lightning...13 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........3 degrees cooler. * Min humidity..........36-41 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Chance of lightning...20 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms. Lows 55 to 60. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 62. Highs 82 to 87. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 58 to 63. Highs 86 to 91. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 61 to 66. Highs 86 to 91. East winds 5 to 15 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 63 to 68. Highs 86 to 91. .SUNDAY...Mostly sunny. Highs 86 to 91. $$ MTZ133-171015- Sioux Ranger District Custer National Forest- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. Patchy fog overnight. * Min temperature.......55-60. * 24 hr trend.........3 degrees warmer. * Max humidity..........85-90 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............Southeast winds 5 to 10 mph in the evening shifting to the southwest overnight. * Chance of lightning...12 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......82-87. * 24 hr trend.........2 degrees warmer. * Min humidity..........33-38 percent. * 24 hr trend.........10 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...8 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......55-60. * 24 hr trend.........Unchanged. * Max humidity..........80-85 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........5 degrees cooler. * Min humidity..........42-47 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 5 to 10 mph in the morning shifting to the west in the afternoon. * Chance of lightning...29 percent. * CWR...................Zero. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and thunderstorms. Lows 53 to 58. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 55 to 60. Highs 81 to 86. South winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 56 to 61. Highs 87 to 92. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 58 to 63. Highs 86 to 91. Northeast winds 5 to 15 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 60 to 65. Highs 86 to 91. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 87 to 92. $$ WYZ274-171015- Sheridan County- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......49-54. * 24 hr trend.........2 degrees warmer. * Max humidity..........83-88 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph in the evening becoming light overnight. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...8 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Mostly sunny. * Max temperature.......80-85. * 24 hr trend.........2 degrees warmer. * Min humidity..........32-37 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming north 5 to 10 mph in the afternoon. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...10 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......51-56. * 24 hr trend.........2 degrees warmer. * Max humidity..........81-86 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph in the evening becoming light overnight. * Ridgetop.............West 15 to 25 mph. * Chance of lightning...23 percent. * CWR...................Zero. .TUESDAY... * Sky/weather...........Mostly cloudy. Isolated rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......75-80. * 24 hr trend.........5 degrees cooler. * Min humidity..........42-47 percent. * 24 hr trend.........10 percent wetter. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming north 5 to 10 mph in the afternoon. * Ridgetop.............West 10 to 20 mph. * Chance of lightning...28 percent. * CWR...................20 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Patchy fog. Scattered showers and isolated thunderstorms. Lows 48 to 53. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 49 to 54. Highs 80 to 85. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 52 to 57. Highs 86 to 91. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 56 to 61. Highs 89 to 94. Southeast winds 5 to 10 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 56 to 61. Highs 88 to 93. .SUNDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 85 to 90. $$ WYZ284-171015- Bighorn National Forest- 109 PM MDT Sun Aug 16 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......41-46. * 24 hr trend.........3 degrees warmer. * Max humidity..........82-87 percent. * 24 hr trend.........16 percent drier. * Wind (20 ft) * At Burgess Jct.......Southwest winds 5 to 15 mph. * Chance of lightning...9 percent. * CWR...................Zero. .MONDAY... * Sky/weather...........Sunny in the morning, then partly sunny with isolated showers and thunderstorms in the afternoon. * Max temperature.......66-71. * 24 hr trend.........2 degrees warmer. * Min humidity..........34-39 percent. * 24 hr trend.........9 percent drier. * Wind (20 ft) * At Burgess Jct.......West winds 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................Zero. .MONDAY NIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......42-47. * 24 hr trend.........1 degree warmer. * Max humidity..........80-85 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * At Burgess Jct.......Southwest winds 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................10 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Scattered rain showers in the morning, then numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......62-67. * 24 hr trend.........4 degrees cooler. * Min humidity..........46-51 percent. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * At Burgess Jct.......West winds 5 to 15 mph. * Chance of lightning...28 percent. * CWR...................50 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Patchy fog. Scattered showers and isolated thunderstorms. Lows 40 to 45. West winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Scattered showers and thunderstorms. Lows 42 to 47. Highs 65 to 70. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 46 to 51. Highs 70 to 75. Southwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 48 to 53. Highs 72 to 77. Southwest winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 47 to 52. Highs 73 to 78. .SUNDAY...Partly sunny. Scattered showers and isolated thunderstorms. Highs 70 to 75. $$ weather.gov/billings