National Weather Service Forecast for: Great Falls MT
Issued by: National Weather Service Great Falls, MT
Updated: 1:52 am MDT Jun 30, 2026
 
Today

Today: A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny, with a high near 75. West southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Tonight

Tonight: A slight chance of showers and thunderstorms between 8pm and 9pm. Partly cloudy, with a low around 51. West southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.
Slight Chance
T-storms then
Partly Cloudy
 Wednesday

Wednesday: A slight chance of showers before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm. Partly sunny, with a high near 77. West southwest wind 3 to 6 mph. Chance of precipitation is 30%.
Partly Sunny
then Chance
Showers
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 50. South southwest wind 3 to 6 mph.
Partly Cloudy

 Thursday

Thursday: Sunny, with a high near 79. Southwest wind 3 to 6 mph.
Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52. West wind around 5 mph becoming light and variable in the evening.
Partly Cloudy

 Friday

Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
Mostly Sunny
then Slight
Chance
T-storms
 Friday
Night
Friday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51. Southwest wind 5 to 7 mph.
Slight Chance
T-storms then
Mostly Clear
 Independence
Day
Independence Day: Sunny, with a high near 82.
Sunny
Hi 75 °F Lo 51 °F Hi 77 °F Lo 50 °F Hi 79 °F Lo 52 °F Hi 79 °F Lo 51 °F Hi 82 °F

 

Today
 
 A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny, with a high near 75. West southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tonight
 
 A slight chance of showers and thunderstorms between 8pm and 9pm. Partly cloudy, with a low around 51. West southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.
Wednesday
 
 A slight chance of showers before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm. Partly sunny, with a high near 77. West southwest wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday Night
 
 Partly cloudy, with a low around 50. South southwest wind 3 to 6 mph.
Thursday
 
 Sunny, with a high near 79. Southwest wind 3 to 6 mph.
Thursday Night
 
 Partly cloudy, with a low around 52. West wind around 5 mph becoming light and variable in the evening.
Friday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
 A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51. Southwest wind 5 to 7 mph.
Independence Day
 
 Sunny, with a high near 82.
Saturday Night
 
 Mostly clear, with a low around 53.
Sunday
 
 Sunny, with a high near 88.
Sunday Night
 
 Mostly clear, with a low around 56.
Monday
 
 Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Great Falls MT.