Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
250 FNUS55 KBYZ 170802 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 202 AM MDT Mon Aug 17 2026 .DISCUSSION... Isolated to scattered late day showers and thunderstorms are expected through Tuesday. A few storms may be strong to severe over central Montana this afternoon. The main concerns are strong wind gusts and lightning, while heavy rainfall and hail are secondary concerns. The chance for precipitation will decrease in coverage through the end of the week. Expect seasonal temps in the 80s into Wednesday, warming to around 90 degrees after midweek. Minimum relative humidity values will be mainly in the 20s and 30s. The exception looks to be Wednesday and Thursday when some areas see RH readings drop into the teens percent. BT/PM MTZ123-172215- Gallatin National Forest- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......75-84 at 5000 feet...64-74 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Min humidity..........24-34 percent at 5000 feet...26-36 percent at 7000 feet. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Cloudy. Numerous rain showers and isolated 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..........64-69 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................Less than 10 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......73-83 at 5000 feet...62-72 at 7000 feet. * 24 hr trend.........1 degree cooler. * Min humidity..........24-34 percent at 5000 feet...26-36 percent at 7000 feet. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...29 percent. * CWR...................10 percent. .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 85. Southwest winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 52 to 62. Highs 81 to 91. Southwest winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Scattered showers. Lows 53 to 63. Highs 83 to 93. South winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 51 to 61. Highs 80 to 90. .SUNDAY...Mostly sunny. Scattered showers and thunderstorms. Highs 76 to 86. $$ MTZ124-172215- Wheatland County/Sweet Grass County- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........1 degree cooler. * Min humidity..........22-27 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......50-55. * 24 hr trend.........2 degrees warmer. * Max humidity..........78-83 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................Less than 10 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......76-81. * 24 hr trend.........2 degrees cooler. * Min humidity..........24-29 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...29 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 48 to 53. West winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 49 to 54. Highs 80 to 85. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 53 to 58. Highs 84 to 89. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Lows 55 to 60. Highs 85 to 90. Southeast winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 59. Highs 84 to 89. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 82 to 87. $$ MTZ125-172215- Stillwater County- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........2 degrees cooler. * Min humidity..........24-29 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming southeast 5 to 10 mph in the afternoon. * Chance of lightning...21 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated 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.........2 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...20 percent. * CWR...................Less than 10 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........2 degrees cooler. * Min humidity..........23-28 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Light winds in the morning becoming northwest 5 to 10 mph in the afternoon. * Chance of lightning...30 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 52 to 57. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 53 to 58. Highs 81 to 86. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 57 to 62. Highs 87 to 92. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 59 to 64. Highs 87 to 92. Southeast winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 57 to 62. Highs 86 to 91. .SUNDAY...Mostly sunny. Scattered showers and isolated thunderstorms. Highs 82 to 87. $$ MTZ126-172215- Beartooth Ranger District Custer National Forest- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......74-83 at 5000 feet...66-76 at 7000 feet. * 24 hr trend.........2 degrees warmer. * Min humidity..........33-38 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...29 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......55-62 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.........4 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 15 mph. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...22 percent. * CWR...................Less than 10 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......72-80 at 5000 feet...63-73 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Min humidity..........30-40 percent at 5000 feet...32-42 percent at 7000 feet. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...33 percent. * CWR...................20 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and thunderstorms. Lows 52 to 59. West winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 54 to 62. Highs 74 to 84. West winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 57 to 66. Highs 79 to 88. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 59 to 68. Highs 82 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. $$ MTZ127-172215- Golden Valley County/Musselshell county- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......76-81. * 24 hr trend.........3 degrees cooler. * Min humidity..........30-35 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...16 percent. * CWR...................10 percent. .TONIGHT... * Sky/weather...........Cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......57-62. * 24 hr trend.........Unchanged. * Max humidity..........66-71 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................20 percent. .TUESDAY... * Sky/weather...........Partly sunny. Isolated rain showers in the morning, then scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......73-78. * 24 hr trend.........3 degrees cooler. * Min humidity..........31-36 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph in the morning shifting to the east in the afternoon. * Chance of lightning...24 percent. * CWR...................20 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 62. Highs 78 to 83. Northwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 60 to 65. Highs 81 to 86. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Lows 62 to 67. Highs 82 to 87. East winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers. Lows 61 to 66. Highs 83 to 88. .SUNDAY...Mostly sunny. Highs 80 to 85. $$ MTZ128-172215- Yellowstone County- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. * Max temperature.......82-87. * 24 hr trend.........2 degrees cooler. * Min humidity..........23-28 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...11 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......57-62. * 24 hr trend.........Unchanged. * Max humidity..........73-78 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...19 percent. * CWR...................10 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........3 degrees cooler. * Min humidity..........27-32 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph in the morning shifting to the northeast in the afternoon. * Chance of lightning...22 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 56 to 61. West winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 62. Highs 83 to 88. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 60 to 65. Highs 87 to 92. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 62 to 67. Highs 88 to 93. Northeast winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 61 to 66. Highs 88 to 93. .SUNDAY...Mostly sunny. Isolated showers. Highs 86 to 91. $$ MTZ129-172215- Crow Indian Reservation/Bighorn Canyon Rec Area- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Mostly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......74-84 at 5000 feet...67-74 at 7000 feet. * 24 hr trend.........Unchanged. * Min humidity..........28-33 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......56-62 at 5000 feet...54-59 at 7000 feet. * 24 hr trend.........Unchanged. * Max humidity..........58-68 percent at 5000 feet...53-60 percent at 7000 feet. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph. * Ridgetop.............Southwest 5 to 10 mph. * Chance of lightning...16 percent. * CWR...................Less than 10 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...64-71 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Min humidity..........29-39 percent at 5000 feet...33-43 percent at 7000 feet. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 59. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 56 to 62. Highs 76 to 86. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 59 to 65. Highs 80 to 90. South winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 61 to 67. Highs 81 to 91. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 61 to 67. Highs 81 to 91. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 77 to 87. $$ MTZ130-172215- Northern Rosebud/Northern Treasure Counties- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......84-89. * 24 hr trend.........1 degree cooler. * Min humidity..........27-32 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Light winds in the morning becoming northwest 5 to 10 mph in the afternoon. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......56-61. * 24 hr trend.........Unchanged. * Max humidity..........83-88 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph in the evening becoming light overnight. * Chance of lightning...19 percent. * CWR...................20 percent. .TUESDAY... * Sky/weather...........Mostly sunny. Isolated rain showers in the morning, then isolated showers and thunderstorms in the afternoon. * Max temperature.......82-87. * 24 hr trend.........2 degrees cooler. * Min humidity..........27-32 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Light winds in the morning becoming northeast 5 to 10 mph in the afternoon. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 57 to 62. Highs 86 to 91. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 59 to 64. Highs 89 to 94. North winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 61 to 66. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers. Lows 62 to 67. Highs 90 to 95. .SUNDAY...Mostly sunny. Highs 89 to 94. $$ MTZ131-172215- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Mostly sunny. * Max temperature.......84-89. * 24 hr trend.........1 degree cooler. * Min humidity..........21-26 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...3 percent. * CWR...................Zero. .TONIGHT... * 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..........77-82 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................20 percent. .TUESDAY... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......80-85. * 24 hr trend.........4 degrees cooler. * Min humidity..........26-31 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...28 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 52 to 57. West winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 54 to 59. Highs 84 to 89. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 57 to 62. Highs 88 to 93. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 60 to 65. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 60 to 65. Highs 90 to 95. .SUNDAY...Mostly sunny. Highs 88 to 93. $$ MTZ132-172215- Custer County- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. * Max temperature.......80-85. * 24 hr trend.........1 degree warmer. * Min humidity..........28-33 percent. * 24 hr trend.........6 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...6 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......55-60. * 24 hr trend.........2 degrees cooler. * Max humidity..........79-84 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph in the evening shifting to the south overnight. * Chance of lightning...25 percent. * CWR...................40 percent. .TUESDAY... * Sky/weather...........Mostly sunny. Isolated rain showers in the morning, then isolated showers and thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........2 degrees cooler. * Min humidity..........26-31 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. East winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Isolated showers. Lows 56 to 61. Highs 81 to 86. South winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 57 to 62. Highs 86 to 91. Northwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 60 to 65. Highs 85 to 90. East winds 5 to 15 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 62 to 67. Highs 85 to 90. .SUNDAY...Mostly sunny. Highs 86 to 91. $$ MTZ133-172215- Sioux Ranger District Custer National Forest- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Mostly sunny. * Max temperature.......83-88. * 24 hr trend.........2 degrees warmer. * Min humidity..........27-32 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...5 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then scattered rain showers and isolated thunderstorms overnight. * Min temperature.......54-59. * 24 hr trend.........1 degree cooler. * Max humidity..........82-87 percent. * 24 hr trend.........6 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph. * Chance of lightning...28 percent. * CWR...................10 percent. .TUESDAY... * Sky/weather...........Mostly cloudy in the morning, then mostly sunny with isolated showers and thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........4 degrees cooler. * Min humidity..........28-33 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 58. Southeast winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 59. Highs 80 to 85. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 56 to 61. Highs 87 to 92. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 57 to 62. Highs 85 to 90. East winds 5 to 15 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 59 to 64. Highs 84 to 89. .SUNDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 87 to 92. $$ WYZ274-172215- Sheridan County- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Mostly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......81-86. * 24 hr trend.........2 degrees cooler. * Min humidity..........24-29 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming north 5 to 10 mph in the afternoon. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...16 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......52-57. * 24 hr trend.........3 degrees warmer. * Max humidity..........80-85 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph in the evening becoming light overnight. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................20 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Isolated rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........4 degrees cooler. * Min humidity..........29-34 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming northwest 5 to 10 mph in the afternoon. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...29 percent. * CWR...................10 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 81 to 86. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 53 to 58. Highs 86 to 91. Northwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 55 to 60. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 56 to 61. Highs 88 to 93. .SUNDAY...Mostly sunny. Scattered showers and isolated thunderstorms. Highs 86 to 91. $$ WYZ284-172215- Bighorn National Forest- 202 AM MDT Mon Aug 17 2026 .Today... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......66-71. * 24 hr trend.........2 degrees warmer. * Min humidity..........30-35 percent. * 24 hr trend.........9 percent drier. * Wind (20 ft) * At Burgess Jct.......West winds 5 to 15 mph. * Chance of lightning...26 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then scattered rain showers overnight. * Min temperature.......42-47. * 24 hr trend.........1 degree warmer. * Max humidity..........82-87 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * At Burgess Jct.......Southwest winds 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................Less than 10 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Scattered rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......63-68. * 24 hr trend.........3 degrees cooler. * Min humidity..........35-40 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * At Burgess Jct.......Northwest winds 5 to 15 mph. * Chance of lightning...28 percent. * CWR...................40 percent. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 40 to 45. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 42 to 47. Highs 65 to 70. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 45 to 50. Highs 70 to 75. West winds 5 to 15 mph. .FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 48 to 53. Highs 73 to 78. Southwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 47 to 52. Highs 73 to 78. .SUNDAY...Mostly sunny. Scattered showers and thunderstorms. Highs 70 to 75. $$ weather.gov/billings