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 (HRWM8)

Lat: 46.73167°NLon: 112.01917°WElev: 3800.0ft.

NA

60°F

16°C

Humidity 67%
Wind Speed NNE 17 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 05 Sep 11:53 PM MDT
Extended Forecast for

8 Miles ESE Marysville MT

  • Overnight

    Overnight: A slight chance of rain between 3am and 5am.  Patchy fog after 5am.  Otherwise, increasing clouds, with a low around 47. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    Low: 47 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Sunday

    Sunday: Areas of fog before 9am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind becoming north northeast 8 to 13 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 74 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe.  Patchy fog after 4am. Low around 49. North northeast wind 9 to 14 mph becoming light northwest  after midnight. Winds could gust as high as 22 mph.  Chance of precipitation is 80%.

    Low: 49 °F

    Severe
    Thunderstorms
    then Showers
    and Patchy
    Fog

  • Labor Day

    Labor Day: Showers and possibly a thunderstorm, mainly before 3pm, then rain likely after 3pm.  Areas of fog before 9am. High near 63. Breezy, with a light and variable wind becoming west 18 to 23 mph in the morning. Winds could gust as high as 36 mph.  Chance of precipitation is 100%.

    High: 63 °F

    Showers and
    Areas Fog
    then Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: A 30 percent chance of rain, mainly after midnight.  Mostly cloudy, with a low around 43. West southwest wind 13 to 21 mph, with gusts as high as 34 mph.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain.  Partly sunny, with a high near 66. West southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 66 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. West southwest wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Light west southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of rain between 3am and 5am. Patchy fog after 5am. Otherwise, increasing clouds, with a low around 47. Northwest wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Sunday
Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind becoming north northeast 8 to 13 mph in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Patchy fog after 4am. Low around 49. North northeast wind 9 to 14 mph becoming light northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Labor Day
Showers and possibly a thunderstorm, mainly before 3pm, then rain likely after 3pm. Areas of fog before 9am. High near 63. Breezy, with a light and variable wind becoming west 18 to 23 mph in the morning. Winds could gust as high as 36 mph. Chance of precipitation is 100%.
Monday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 43. West southwest wind 13 to 21 mph, with gusts as high as 34 mph.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 66. West southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 42. West southwest wind 5 to 11 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 75. Light west southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 47.
Friday
A chance of showers. Mostly sunny, with a high near 71.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Saturday
A chance of showers. Partly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles ESE Marysville MT
 46.72°N 112.13°W (Elev. 4213 ft)
12:36 am MDT Sep 6, 2026
12am MDT Sep 6, 2026-6pm MDT Sep 12, 2026
 
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Additional Resources

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