National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

Lat: 47.47333°NLon: 111.38222°WElev: 3675.0ft.

Clear

60°F

16°C

Humidity 64%
Wind Speed ENE 3 MPH
Barometer 30.23 in (1023.71 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Sep 11:53 AM MDT
Extended Forecast for

Great Falls International Airport MT

  • This Afternoon

    This Afternoon: Cloudy, with a high near 68. East wind around 7 mph.

    High: 68 °F

    Cloudy

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 47. East wind 5 to 8 mph becoming light and variable after midnight.

    Low: 47 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. East wind 5 to 7 mph becoming south after midnight.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79. South southwest wind around 6 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. South wind 5 to 8 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. South southwest wind 3 to 7 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. West wind 5 to 7 mph becoming southeast in the evening.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Cloudy, with a high near 68. East wind around 7 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 47. East wind 5 to 8 mph becoming light and variable after midnight.
Sunday
Mostly sunny, with a high near 74. Light and variable wind.
Sunday Night
Mostly clear, with a low around 47. East wind 5 to 7 mph becoming south after midnight.
Monday
Sunny, with a high near 79. South southwest wind around 6 mph.
Monday Night
Mostly clear, with a low around 50. South wind 5 to 8 mph.
Tuesday
Sunny, with a high near 79. South southwest wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 50. West wind 5 to 7 mph becoming southeast in the evening.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls International Airport MT
 47.49°N 111.37°W (Elev. 3635 ft)
Last Update:
9:51 am MDT Sep 19, 2026
Forecast Valid:
12pm MDT Sep 19, 2026-6pm MDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation