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

Fire Weather in the Central and Southern Plains; Pacific Storms Impacting the West

Gusty to high winds and low relative humidity will bring elevated to critical fire weather to the central and southern Plains into Wednesday. Two Pacific storms will impact the western U.S. into Wednesday with gusty winds, low elevation rain, and heavy mountain snow. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

39°F

4°C

Humidity 51%
Wind Speed S 8 MPH
Barometer 29.65 in (1004.06 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 16 Feb 09:20 AM MST
Extended Forecast for

Lewistown MT

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 51. South wind 5 to 9 mph.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 31. Southeast wind 6 to 9 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain and snow likely before 4pm, then a slight chance of snow after 5pm. Patchy blowing snow after 3pm. Cloudy, with a temperature rising to near 38 by 10am, then falling to around 28 during the remainder of the day. Breezy, with an east southeast wind 6 to 11 mph becoming west northwest 17 to 22 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 38 °F⇓

    Chance
    Rain/Snow
    then Snow
    Likely and
    Patchy
    Blowing Snow

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 1. Wind chill values as low as -10. West northwest wind 11 to 20 mph, with gusts as high as 32 mph. New snow accumulation of less than a half inch possible.

    Low: 1 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of snow after 11am. Mostly cloudy, with a high near 12. Northwest wind around 10 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.

    High: 12 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 11pm. Mostly cloudy, with a low around -6. North northwest wind 5 to 10 mph becoming light northwest after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: -6 °F

    Snow Likely

  • Thursday

    Thursday: A 30 percent chance of snow before 11am. Partly sunny, with a high near 16. Calm wind becoming northeast around 5 mph in the afternoon. New snow accumulation of less than a half inch possible.

    High: 16 °F

    Chance Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 2. East northeast wind around 6 mph becoming light and variable after midnight.

    Low: 2 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of snow. Partly sunny, with a high near 27.

    High: 27 °F

    Slight Chance
    Snow

Detailed Forecast

Washington's Birthday
Sunny, with a high near 51. South wind 5 to 9 mph.
Tonight
Increasing clouds, with a low around 31. Southeast wind 6 to 9 mph.
Tuesday
Rain and snow likely before 4pm, then a slight chance of snow after 5pm. Patchy blowing snow after 3pm. Cloudy, with a temperature rising to near 38 by 10am, then falling to around 28 during the remainder of the day. Breezy, with an east southeast wind 6 to 11 mph becoming west northwest 17 to 22 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 1. Wind chill values as low as -10. West northwest wind 11 to 20 mph, with gusts as high as 32 mph. New snow accumulation of less than a half inch possible.
Wednesday
A 30 percent chance of snow after 11am. Mostly cloudy, with a high near 12. Northwest wind around 10 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow likely, mainly before 11pm. Mostly cloudy, with a low around -6. North northwest wind 5 to 10 mph becoming light northwest after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Thursday
A 30 percent chance of snow before 11am. Partly sunny, with a high near 16. Calm wind becoming northeast around 5 mph in the afternoon. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly cloudy, with a low around 2. East northeast wind around 6 mph becoming light and variable after midnight.
Friday
A slight chance of snow. Partly sunny, with a high near 27.
Friday Night
Mostly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 30.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
8:38 am MST Feb 16, 2026
Forecast Valid:
9am MST Feb 16, 2026-6pm MST Feb 22, 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