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

Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Clear

28°F

-2°C

Humidity 58%
Wind Speed N 0 MPH
Barometer 30.39 in (1029.12 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 30 Dec 01:20 AM MST
Extended Forecast for

Helena MT

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 28. Southwest wind 3 to 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 42. Light and variable wind becoming south around 6 mph in the afternoon.

    High: 42 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 22. South southwest wind around 6 mph.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 46. Light and variable wind becoming south southeast around 6 mph in the afternoon.

    High: 46 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. South southwest wind around 6 mph.

    Low: 32 °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 32. South southwest wind around 5 mph.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 47. South wind around 6 mph.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 28. Southwest wind 3 to 6 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 42. Light and variable wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 22. South southwest wind around 6 mph.
Wednesday
Increasing clouds, with a high near 46. Light and variable wind becoming south southeast around 6 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 32. South southwest 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 32. South southwest wind around 5 mph.
Friday
Partly sunny, with a high near 47. South wind around 6 mph.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
A slight chance of rain before 2pm, then a slight chance of rain and snow. Partly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.58°N 112.01°W (Elev. 4111 ft)
Last Update:
1:02 am MST Dec 30, 2025
Forecast Valid:
1am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

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Chance of Precipitation