National Weather Service Forecast for: Malmstrom Afb MT
Issued by: National Weather Service Great Falls, MT
Updated: 4:21 pm MDT Sep 12, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 42. Northeast wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 18 mph.
Partly Cloudy

 Sunday

Sunday: A 20 percent chance of showers after 5pm. Areas of fog between 7am and 9am. Otherwise, mostly sunny, with a high near 69. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Areas Fog
then Slight
Chance
Showers
 Sunday
Night
Sunday Night: Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 47. Northwest wind 9 to 16 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Slight Chance
Showers
 Monday

Monday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 63. Breezy, with a southwest wind 21 to 23 mph, with gusts as high as 34 mph.
Breezy.
Slight Chance
Showers then
Partly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 43. West northwest wind 5 to 14 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.
Partly Cloudy

 Tuesday

Tuesday: Partly sunny, with a high near 65. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Partly Sunny

 Tuesday
Night
Tuesday Night: A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 44. North northeast wind 6 to 10 mph.
Chance
Showers

 Wednesday

Wednesday: Mostly sunny, with a high near 64. West wind around 6 mph becoming calm in the afternoon.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 44.
Mostly Clear
Lo 42 °F Hi 69 °F Lo 47 °F Hi 63 °F Lo 43 °F Hi 65 °F Lo 44 °F Hi 64 °F Lo 44 °F

 

Tonight
 
 Partly cloudy, with a low around 42. Northeast wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 18 mph.
Sunday
 
 A 20 percent chance of showers after 5pm. Areas of fog between 7am and 9am. Otherwise, mostly sunny, with a high near 69. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Sunday Night
 
 Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 47. Northwest wind 9 to 16 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A 20 percent chance of showers before noon. Mostly cloudy, with a high near 63. Breezy, with a southwest wind 21 to 23 mph, with gusts as high as 34 mph.
Monday Night
 
 Partly cloudy, with a low around 43. West northwest wind 5 to 14 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.
Tuesday
 
 Partly sunny, with a high near 65. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Tuesday Night
 
 A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 44. North northeast wind 6 to 10 mph.
Wednesday
 
 Mostly sunny, with a high near 64. West wind around 6 mph becoming calm in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 44.
Thursday
 
 Sunny, with a high near 73.
Thursday Night
 
 Mostly clear, with a low around 46.
Friday
 
 Sunny, with a high near 73.
Friday Night
 
 Mostly clear, with a low around 48.
Saturday
 
 Sunny, with a high near 78.

 

Forecast from NOAA-NWS for Malmstrom Afb MT.