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

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Clear

23°F

-5°C

Humidity 77%
Wind Speed WNW 3 MPH
Barometer 30.42 in (1030.14 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 30 Dec 07:53 AM MST
Extended Forecast for

Helena MT

  • Today

    Today: Sunny, with a high near 40. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 40 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 18. South wind around 6 mph.

    Low: 18 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 43. South wind 3 to 6 mph.

    High: 43 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. South wind around 6 mph.

    Low: 30 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly cloudy, with a high near 43. Light south wind.

    High: 43 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. South wind around 5 mph.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 47. South wind 3 to 6 mph.

    High: 47 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 31. South wind around 7 mph.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain. Partly sunny, with a high near 47.

    High: 47 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 40. Calm wind becoming east southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 18. South wind around 6 mph.
Wednesday
Increasing clouds, with a high near 43. South wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 30. South wind around 6 mph.
New Year's Day
Mostly cloudy, with a high near 43. Light south wind.
Thursday Night
Mostly cloudy, with a low around 29. South wind around 5 mph.
Friday
Mostly cloudy, with a high near 47. South wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 31. South wind around 7 mph.
Saturday
A slight chance of rain. Partly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
Partly sunny, with a high near 44.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.61°N 111.96°W (Elev. 3796 ft)
Last Update:
7:57 am MST Dec 30, 2025
Forecast Valid:
8am MST Dec 30, 2025-6pm MST Jan 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