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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Helena Regional Airport (KHLN)

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

smoke

91°F

33°C

Humidity 15%
Wind Speed N 4 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 38°F (3°C)
Visibility 9.00 mi
Heat Index87°F (31°C)
Last update 29 Jul 06:53 PM MDT
Extended Forecast for

Helena MT

Fire Weather Watch August 1, 02:00pm until August 2, 09:00pm
Click here for hazard details and duration
Fire Weather Watch

  • Tonight

    Tonight: Patchy smoke. Partly cloudy, with a low around 60. West northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 60 °F

    Patchy Smoke

  • Thursday

    Thursday: Patchy smoke before 10am, then patchy smoke after 1pm. Sunny, with a high near 93. Calm wind becoming north around 6 mph in the afternoon.

    High: 93 °F

    Patchy Smoke

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Patchy smoke. Mostly cloudy, with a low around 60. North northwest wind around 6 mph becoming southwest after midnight. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: Patchy smoke before 7am. Cloudy through mid morning, then gradual clearing, with a high near 95. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 95 °F

    Patchy Smoke
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. North northwest wind around 6 mph becoming light and variable after midnight.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Light south southeast wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Breezy, with a west wind 13 to 23 mph, with gusts as high as 40 mph.

    Low: 62 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Sunday

    Sunday: Sunny, with a high near 85. West northwest wind 10 to 18 mph, with gusts as high as 31 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

Detailed Forecast

Tonight
Patchy smoke. Partly cloudy, with a low around 60. West northwest wind 5 to 8 mph becoming light and variable after midnight.
Thursday
Patchy smoke before 10am, then patchy smoke after 1pm. Sunny, with a high near 93. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Patchy smoke. Mostly cloudy, with a low around 60. North northwest wind around 6 mph becoming southwest after midnight. Chance of precipitation is 30%.
Friday
Patchy smoke before 7am. Cloudy through mid morning, then gradual clearing, with a high near 95. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 60. North northwest wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny and hot, with a high near 100. Light south southeast wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Mostly clear, with a low around 62. Breezy, with a west wind 13 to 23 mph, with gusts as high as 40 mph.
Sunday
Sunny, with a high near 85. West northwest wind 10 to 18 mph, with gusts as high as 31 mph.
Sunday Night
Clear, with a low around 52.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.58°N 112.04°W (Elev. 4413 ft)
Last Update:
4:21 pm MDT Jul 29, 2026
Forecast Valid:
7pm MDT Jul 29, 2026-6pm MDT Aug 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation