Area Forecast Product
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
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418 FPUS65 KTFX 182138 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 337 PM MDT Tue Aug 18 2026 MTZ301>314-316>318-191200- Central Montana- National Weather Service Great Falls MT 337 PM MDT Tue Aug 18 2026 .TONIGHT...Partly cloudy. Slight chance of showers and thunderstorms in the evening. Patchy smoke through the night. Lows 50 to 60...45 to 55 in the mountains. .WEDNESDAY...Partly cloudy. Patchy smoke. Highs 80 to 85...70 to 80 in the mountains. .WEDNESDAY NIGHT...Partly cloudy. Patchy smoke in the evening. Lows 50 to 60. .THURSDAY...Mostly clear. Highs 75 to 85. .FRIDAY...Mostly clear. Lows 50 to 55. Highs 80 to 90. .SATURDAY...Mostly cloudy. Chance of showers and slight chance of thunderstorms. Lows 55 to 60. Highs 80 to 90. .SUNDAY...Mostly clear. Slight chance of rain showers. Lows 55 to 60. Highs 75 to 85. $$ MTZ315-319>330-191200- Southwest Montana- National Weather Service Great Falls MT 337 PM MDT Tue Aug 18 2026 .TONIGHT...Mostly cloudy in the evening then clearing. Slight chance of rain showers in the evening. Lows 45 to 55. .WEDNESDAY...Sunny. Highs 75 to 85...65 to 75 in the mountains. .WEDNESDAY NIGHT...Mostly clear. Lows 45 to 55. .THURSDAY...Mostly clear. Highs 75 to 85. .FRIDAY...Partly cloudy. Chance of rain showers. Lows 50 to 55. Highs 75 to 85. .SATURDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 55 to 60. Highs 75 to 85. .SUNDAY...Partly cloudy. Lows 50 to 55. Highs 70 to 80. $$