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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Clear

54°F

12°C

Humidity 54%
Wind Speed SSE 3 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 21 Mar 10:35 AM MDT
Extended Forecast for

Helena MT

  • Today

    Today: A slight chance of rain between noon and 2pm. Mostly sunny, with a temperature rising to near 57 by noon, then falling to around 49 during the remainder of the day. Breezy, with a west wind 6 to 11 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 20%.

    High: 57 °F⇓

    Mostly Sunny
    then Slight
    Chance Rain
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 30. West northwest wind 15 to 20 mph becoming southwest 5 to 10 mph in the evening. Winds could gust as high as 34 mph.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52. Southwest wind 6 to 14 mph, with gusts as high as 32 mph.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 29 mph.

    Low: 32 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 59. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 59 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. West northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow before 3pm, then a chance of rain. Mostly cloudy, with a high near 59. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 59 °F

    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 44. Southwest wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 44 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Partly sunny, with a high near 57. Breezy.

    High: 57 °F

    Chance Rain
    and Breezy

Detailed Forecast

Today
A slight chance of rain between noon and 2pm. Mostly sunny, with a temperature rising to near 57 by noon, then falling to around 49 during the remainder of the day. Breezy, with a west wind 6 to 11 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 30. West northwest wind 15 to 20 mph becoming southwest 5 to 10 mph in the evening. Winds could gust as high as 34 mph.
Sunday
Sunny, with a high near 52. Southwest wind 6 to 14 mph, with gusts as high as 32 mph.
Sunday Night
Partly cloudy, with a low around 32. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 29 mph.
Monday
Partly sunny, with a high near 59. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 38. West northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Tuesday
A chance of rain and snow before 3pm, then a chance of rain. Mostly cloudy, with a high near 59. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday Night
A slight chance of rain before midnight. Mostly cloudy, with a low around 44. Southwest wind 9 to 11 mph, with gusts as high as 23 mph.
Wednesday
A chance of rain. Partly sunny, with a high near 57. Breezy.
Wednesday Night
A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 3am, then a slight chance of snow after 3am. Partly cloudy, with a low around 31. Blustery.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.58°N 112.07°W (Elev. 4764 ft)
Last Update:
8:22 am MDT Mar 21, 2026
Forecast Valid:
10am MDT Mar 21, 2026-6pm MDT Mar 27, 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