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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

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

Clear

64°F

18°C

Humidity 42%
Wind Speed ENE 9 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 03 Oct 06:35 PM MDT
Extended Forecast for

Sun Prairie MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 39. East wind 5 to 8 mph becoming calm in the evening.

    Low: 39 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. Light and variable wind becoming southwest 5 to 7 mph after midnight.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Southwest wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. West southwest wind 5 to 8 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. West wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. West southwest wind 3 to 6 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 39. East wind 5 to 8 mph becoming calm in the evening.
Sunday
Sunny, with a high near 78. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 48. Light and variable wind becoming southwest 5 to 7 mph after midnight.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.
Monday Night
Mostly clear, with a low around 50. Southwest wind 7 to 10 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 78. West southwest wind 5 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 45. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 77. West southwest wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 76.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Saturday
A chance of rain. Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sun Prairie MT
 47.54°N 111.5°W (Elev. 3399 ft)
Last Update:
4:41 pm MDT Oct 3, 2026
Forecast Valid:
6pm MDT Oct 3, 2026-6pm MDT Oct 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation