National Weather Service Forecast for: Great Falls MT
Issued by: National Weather Service Great Falls, MT
Updated: 7:57 pm MDT Aug 4, 2025
 
Tonight

Tonight: Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 3am. Some of the storms could be severe. Low around 56. West southwest wind 6 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Severe
T-Storms
then Chance
Showers
 Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 80. West southwest wind 7 to 14 mph, with gusts as high as 20 mph.
Chance
Showers then
Slight Chance
T-storms
 Tuesday
Night
Tuesday Night: Widespread haze. Partly cloudy, with a low around 50. South southwest wind 5 to 10 mph.
Haze

 Wednesday

Wednesday: Mostly sunny, with a high near 87. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 58. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Mostly Cloudy

 Thursday

Thursday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Partly Sunny
then Chance
Showers
 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 51. West wind 7 to 10 mph, with gusts as high as 20 mph.
Chance
T-storms

 Friday

Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76. West southwest wind 7 to 14 mph, with gusts as high as 23 mph.
Chance
Showers

 Friday
Night
Friday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.
Slight Chance
T-storms then
Partly Cloudy
Lo 56 °F Hi 80 °F Lo 50 °F Hi 87 °F Lo 58 °F Hi 81 °F Lo 51 °F Hi 76 °F Lo 52 °F

 

Tonight
 
 Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 3am. Some of the storms could be severe. Low around 56. West southwest wind 6 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Tuesday
 
 A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 80. West southwest wind 7 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Widespread haze. Partly cloudy, with a low around 50. South southwest wind 5 to 10 mph.
Wednesday
 
 Mostly sunny, with a high near 87. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Wednesday Night
 
 Mostly cloudy, with a low around 58. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Thursday
 
 A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 51. West wind 7 to 10 mph, with gusts as high as 20 mph.
Friday
 
 A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76. West southwest wind 7 to 14 mph, with gusts as high as 23 mph.
Friday Night
 
 A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.
Saturday
 
 Mostly sunny, with a high near 81.
Saturday Night
 
 Partly cloudy, with a low around 54.
Sunday
 
 Mostly sunny, with a high near 82.
Sunday Night
 
 Partly cloudy, with a low around 54.
Monday
 
 Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Great Falls MT.