FPUS65 KTFX 220253 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT Issued by National Weather Service Missoula MT 853 PM MDT Wed May 21 2025 MTZ301>314-316>318-221215- Central Montana- National Weather Service Great Falls MT 853 PM MDT Wed May 21 2025 .REST OF TONIGHT...Mostly clear. Chance of rain showers early in the evening. Lows 35 to 40...30 to 35 in the mountains. .THURSDAY...Mostly cloudy. Highs 60 to 70...50 to 60 in the mountains. .THURSDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in the evening. Rain showers through the night. Lows 40 to 45... 35 to 40 in the mountains. .FRIDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. .SATURDAY...Partly cloudy. Slight chance of rain showers. Lows 35 to 40. Highs 60 to 70. .SUNDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. .MEMORIAL DAY...Mostly clear. Slight chance of rain showers. Lows in the mid 40s. Highs 70 to 80. $$ MTZ315-319>330-221215- Southwest Montana- National Weather Service Great Falls MT 853 PM MDT Wed May 21 2025 .REST OF TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows 30 to 40. .THURSDAY...Mostly cloudy. Slight chance of rain showers in the afternoon. Highs 60 to 65...50 to 60 in the mountains. .THURSDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Chance of showers and thunderstorms. Lows 30 to 40. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Highs 55 to 65. .SATURDAY...Partly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Highs 55 to 65. .SUNDAY...Mostly clear. Lows 35 to 40. Highs 60 to 70. .MEMORIAL DAY...Mostly clear. Slight chance of rain showers. Lows 40 to 45. Highs 65 to 75. $$