Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

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

Clear

52°F

11°C

Humidity 86%
Wind Speed N 11 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 05 Sep 12:53 AM MDT
Extended Forecast for

Sun Prairie MT

  • Overnight

    Overnight: Partly cloudy, with a low around 46. Northwest wind 3 to 8 mph.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers before 7am.  Mostly sunny, with a high near 74. Light and variable wind becoming northeast 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers, mainly before 11pm.  Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 46. Northeast wind 5 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 46 °F

    Chance
    Showers then
    Patchy Fog

  • Sunday

    Sunday: A 20 percent chance of showers before 8am.  Areas of fog before 9am.  Otherwise, mostly cloudy, with a high near 73. North northwest wind 3 to 8 mph.

    High: 73 °F

    Slight Chance
    Showers and
    Areas Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm.  Low around 47. North northwest wind 6 to 10 mph.  Chance of precipitation is 90%.

    Low: 47 °F

    Showers

  • Labor Day

    Labor Day: Rain before 9am, then showers and possibly a thunderstorm after 9am.  High near 65. West southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 26 mph.  Chance of precipitation is 90%.

    High: 65 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 9pm, then rain, mainly after 9pm.  Low around 43. Breezy, with a west southwest wind 20 to 24 mph, with gusts as high as 37 mph.  Chance of precipitation is 80%.

    Low: 43 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: A chance of rain before noon.  Partly sunny, with a high near 70. West southwest wind 15 to 21 mph, with gusts as high as 30 mph.

    High: 70 °F

    Chance Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 46. Northwest wind 3 to 8 mph.
Saturday
A 20 percent chance of showers before 7am. Mostly sunny, with a high near 74. Light and variable wind becoming northeast 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A 40 percent chance of showers, mainly before 11pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46. Northeast wind 5 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of showers before 8am. Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 73. North northwest wind 3 to 8 mph.
Sunday Night
Showers and possibly a thunderstorm. Low around 47. North northwest wind 6 to 10 mph. Chance of precipitation is 90%.
Labor Day
Rain before 9am, then showers and possibly a thunderstorm after 9am. High near 65. West southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm before 9pm, then rain, mainly after 9pm. Low around 43. Breezy, with a west southwest wind 20 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 80%.
Tuesday
A chance of rain before noon. Partly sunny, with a high near 70. West southwest wind 15 to 21 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 46.
Friday
A slight chance of showers. Mostly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Sun Prairie MT
 47.54°N 111.47°W (Elev. 3399 ft)
12:31 am MDT Sep 5, 2026
1am MDT Sep 5, 2026-6pm MDT Sep 11, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database