Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Hazardous Weather Conditions

Current conditions at

Helena Regional Airport (KHLN)

Lat: 46.60445°NLon: 111.9892°WElev: 3874.0ft.

Clear

64°F

18°C

Humidity 48%
Wind Speed WNW 13 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 05 Sep 09:20 PM MDT
Extended Forecast for

Helena MT

  • Tonight

    Tonight: Patchy fog after 3am.  Otherwise, increasing clouds, with a low around 49. West northwest wind 5 to 10 mph becoming light west  after midnight. Winds could gust as high as 20 mph.

    Low: 49 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Areas of fog before 11am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming north 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am.  Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 51. North northwest wind 5 to 10 mph becoming light northwest  after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 70%.

    Low: 51 °F

    Chance
    Showers then
    Showers
    Likely and
    Patchy Fog

  • Labor Day

    Labor Day: Showers and possibly a thunderstorm.  Areas of fog before 11am. High near 65. Light west northwest wind becoming west 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.  Chance of precipitation is 90%.

    High: 65 °F

    Showers and
    Areas Fog

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly before midnight.  Mostly cloudy, with a low around 46. West wind 11 to 17 mph, with gusts as high as 31 mph.

    Low: 46 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 70. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 70 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. West northwest wind 5 to 10 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 49. West northwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Sunday
Areas of fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming north 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. North northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Labor Day
Showers and possibly a thunderstorm. Areas of fog before 11am. High near 65. Light west northwest wind becoming west 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.
Monday Night
A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 46. West wind 11 to 17 mph, with gusts as high as 31 mph.
Tuesday
Sunny, with a high near 70. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 44. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 50.
Friday
A chance of showers. Mostly sunny, with a high near 74.
Friday Night
A chance of showers. Mostly cloudy, with a low around 47.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.6°N 112.05°W (Elev. 3973 ft)
2:16 pm MDT Sep 5, 2026
9pm MDT Sep 5, 2026-6pm MDT Sep 12, 2026
 
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Additional Resources

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Hourly Weather Forecast

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