FPUS65 KTFX 171644 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 1044 AM MDT Fri Apr 17 2026 MTZ301>314-316>318-180000- Central Montana- National Weather Service Great Falls MT 1044 AM MDT Fri Apr 17 2026 .REST OF TODAY...Mostly cloudy. Chance of snow showers through the day. Slight chance of thunderstorms in the afternoon. Highs 35 to 45...25 to 35 in the mountains. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 20 to 25. .SATURDAY...Sunny then becoming partly cloudy. Not as cool. Highs 55 to 60...40 to 50 in the mountains. .SUNDAY...Mostly clear. Lows 25 to 30. Highs 60 to 70. .MONDAY...Partly cloudy. Lows 35 to 45. Highs 65 to 75. .TUESDAY...Partly cloudy. Lows 40 to 45. Highs 70 to 80. $$ MTZ315-319>330-180000- Southwest Montana- National Weather Service Great Falls MT 1044 AM MDT Fri Apr 17 2026 .REST OF TODAY...Mostly cloudy. Chance of snow showers through the day. Slight chance of thunderstorms in the afternoon. Highs 35 to 45...25 to 35 in the mountains. .TONIGHT...Partly cloudy. Slight chance of snow showers. Lows 15 to 25...10 to 20 in the mountains. .SATURDAY...Sunny in the morning then becoming partly cloudy. Not as cool. Highs 50 to 60...40 to 50 in the mountains. .SUNDAY...Mostly clear. Lows 25 to 30. Highs 55 to 65. .MONDAY...Partly cloudy. Lows 35 to 40. Highs 60 to 70. .TUESDAY...Partly cloudy. Lows 35 to 45. Highs 65 to 75. $$