Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

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

Clear

86°F

30°C

Humidity 19%
Wind Speed WNW 11 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 19 Aug 04:00 PM MDT
Extended Forecast for

Great Falls International Airport MT

  • Tonight

    Tonight: Patchy smoke between 9pm and 11pm. Partly cloudy, with a low around 55. North northwest wind around 8 mph becoming south southeast in the evening.

    Low: 55 °F

    Patchy Smoke
    then Partly
    Cloudy

  • Thursday

    Thursday: Patchy smoke after 3pm. Mostly sunny, with a high near 90. Southwest wind 5 to 8 mph becoming light and variable.

    High: 90 °F

    Mostly Sunny
    then Patchy
    Smoke

  • Thursday Night

    Thursday Night: Patchy smoke before 9pm. Mostly clear, with a low around 55. North northeast wind 5 to 9 mph becoming southwest after midnight.

    Low: 55 °F

    Patchy Smoke
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 88. Light and variable wind becoming northeast 5 to 8 mph in the afternoon.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. East northeast wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 18 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 88. South southeast wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 88 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 57. South southwest wind 8 to 11 mph.

    Low: 57 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86. Breezy, with a south southwest wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 86 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy smoke between 9pm and 11pm. Partly cloudy, with a low around 55. North northwest wind around 8 mph becoming south southeast in the evening.
Thursday
Patchy smoke after 3pm. Mostly sunny, with a high near 90. Southwest wind 5 to 8 mph becoming light and variable.
Thursday Night
Patchy smoke before 9pm. Mostly clear, with a low around 55. North northeast wind 5 to 9 mph becoming southwest after midnight.
Friday
Sunny, with a high near 88. Light and variable wind becoming northeast 5 to 8 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 57. East northeast wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 18 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 88. South southeast wind 6 to 8 mph, with gusts as high as 18 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 57. South southwest wind 8 to 11 mph.
Sunday
Sunny, with a high near 86. Breezy, with a south southwest wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph.
Sunday Night
Mostly clear, with a low around 51.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 54.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls International Airport MT
 47.46°N 111.4°W (Elev. 3599 ft)
12:31 pm MDT Aug 19, 2026
4pm MDT Aug 19, 2026-6pm MDT Aug 26, 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