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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Mostly Cloudy

63°F

17°C

Humidity 72%
Wind Speed N 0 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 29 Aug 02:20 AM MDT
Extended Forecast for

Helena MTSimilar City Names

  • Overnight

    Overnight: A 30 percent chance of showers, mainly before 3am. Mostly cloudy, with a low around 59. Light west southwest wind.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 77. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 52. South wind 6 to 9 mph becoming west in the evening. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Sunday

    Sunday: A 50 percent chance of showers, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 65. West wind 9 to 18 mph, with gusts as high as 29 mph.

    High: 65 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. Southwest wind 7 to 16 mph, with gusts as high as 26 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Calm wind becoming east southeast 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly before 3am. Mostly cloudy, with a low around 59. Light west southwest wind.
Saturday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 77. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 52. South wind 6 to 9 mph becoming west in the evening. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 50 percent chance of showers, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 65. West wind 9 to 18 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 46. Southwest wind 7 to 16 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 76. Calm wind becoming west 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 51. North northeast wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 83. Calm wind becoming east southeast 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.
Wednesday Night
Mostly cloudy, with a low around 52.
Thursday
Partly sunny, with a high near 78.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 50.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Helena MTSimilar City Names
 46.58°N 112.04°W (Elev. 4413 ft)
Last Update:
12:31 am MDT Aug 29, 2026
Forecast Valid:
2am MDT Aug 29, 2026-6pm MDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

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