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.

Partly Cloudy

54°F

12°C

Humidity 81%
Wind Speed N 4 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Sep 07:35 AM MDT
Extended Forecast for

6 Miles WSW Ulm MT

  • Today

    Today: A 20 percent chance of rain before 11am. Cloudy, with a high near 69. Light and variable wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 69 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. East wind 5 to 8 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. East southeast wind around 6 mph becoming calm after midnight.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48. South southwest wind 3 to 7 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. Light southwest wind.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. Southwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of rain before 11am. Cloudy, with a high near 69. Light and variable wind becoming east northeast 5 to 7 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 46. East wind 5 to 8 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 46. East southeast wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 80. Calm wind becoming south southwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 48. South southwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 80. Light southwest wind.
Tuesday Night
Mostly clear, with a low around 49. Southwest wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Ulm MT
 47.4°N 111.63°W (Elev. 3524 ft)
Last Update:
4:31 am MDT Sep 19, 2026
Forecast Valid:
7am MDT Sep 19, 2026-6pm MDT Sep 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation