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

Lewistown, Lewistown Municipal Airport (KLWT)

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

NA

45°F

7°C

Humidity 48%
Wind Speed W 8 MPH
Barometer 29.68 in (1005.08 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 15 Apr 02:05 AM MDT
Extended Forecast for

Lewistown MT

  • Today

    Today: A 50 percent chance of rain after 3pm. Mostly cloudy, with a high near 58. West southwest wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tonight

    Tonight: Snow, possibly mixed with rain, becoming all snow after 1am. Some thunder is also possible. Low around 26. West northwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Rain/Snow

  • Thursday

    Thursday: A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 16 to 18 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. Northwest wind 6 to 16 mph, with gusts as high as 26 mph.

    Low: 18 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after noon. Partly sunny, with a high near 42. West wind 6 to 13 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.

    High: 42 °F

    Mostly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around 22. North northwest wind 5 to 10 mph becoming west southwest after midnight. Winds could gust as high as 21 mph.

    Low: 22 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 54. Southwest wind 6 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. West northwest wind 6 to 8 mph becoming south after midnight.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of rain after 3pm. Mostly cloudy, with a high near 58. West southwest wind 6 to 11 mph, with gusts as high as 23 mph.
Tonight
Snow, possibly mixed with rain, becoming all snow after 1am. Some thunder is also possible. Low around 26. West northwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Thursday
A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 16 to 18 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. Northwest wind 6 to 16 mph, with gusts as high as 26 mph.
Friday
A 30 percent chance of snow after noon. Partly sunny, with a high near 42. West wind 6 to 13 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.
Friday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 22. North northwest wind 5 to 10 mph becoming west southwest after midnight. Winds could gust as high as 21 mph.
Saturday
Sunny, with a high near 54. Southwest wind 6 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 30. West northwest wind 6 to 8 mph becoming south after midnight.
Sunday
Sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
4:02 am MDT Apr 15, 2026
Forecast Valid:
8am MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation