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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Partly Cloudy

37°F

3°C

Humidity 64%
Wind Speed N 0 MPH
Barometer 29.78 in (1008.47 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 01 Jan 03:20 PM MST
Extended Forecast for

Helena MT

  • Tonight

    Tonight: A chance of rain and snow between 10pm and midnight, then a chance of rain after midnight. Cloudy, with a low around 34. Light southwest wind. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 47. Southwest wind 3 to 7 mph.

    High: 47 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. South southwest wind around 7 mph.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 48. South wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. South wind around 9 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 47. South southwest wind 10 to 13 mph, with gusts as high as 28 mph.

    High: 47 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of rain and snow after 11pm. Mostly cloudy, with a low around 33. South southwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain/Snow

  • Monday

    Monday: A chance of rain and snow, mainly before 11am. Partly sunny, with a high near 45. West southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    High: 45 °F

    Chance
    Rain/Snow

  • Monday Night

    Monday Night: A slight chance of rain and snow before 8pm, then a slight chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
A chance of rain and snow between 10pm and midnight, then a chance of rain after midnight. Cloudy, with a low around 34. Light southwest wind. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
A 20 percent chance of rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 47. Southwest wind 3 to 7 mph.
Friday Night
Mostly cloudy, with a low around 32. South southwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 48. South wind 6 to 8 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around 35. South wind around 9 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 47. South southwest wind 10 to 13 mph, with gusts as high as 28 mph.
Sunday Night
A slight chance of rain and snow after 11pm. Mostly cloudy, with a low around 33. South southwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday
A chance of rain and snow, mainly before 11am. Partly sunny, with a high near 45. West southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of rain and snow before 8pm, then a slight chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A slight chance of snow. Partly sunny, with a high near 40.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 23.
Thursday
A chance of snow. Partly sunny, with a high near 34.
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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:
2:07 pm MST Jan 1, 2026
Forecast Valid:
3pm MST Jan 1, 2026-6pm MST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation