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

N/A

Humidity 48%
Wind Speed W 8 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 15 Apr 02:05 AM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Partly cloudy, with a low around 40. West wind 5 to 7 mph becoming southeast in the evening.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 72. South southwest wind around 6 mph becoming light and variable.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. Northeast wind around 6 mph becoming south after midnight.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. South southwest wind 3 to 6 mph.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50. South southeast wind 7 to 9 mph.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 72. South wind 7 to 16 mph becoming west in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    High: 72 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain showers before midnight, then rain between midnight and 3am, then rain and snow after 3am. Some thunder is also possible. Low around 28. Blustery, with a west northwest wind 18 to 28 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Blustery.
    Showers then
    Rain/Snow

  • Thursday

    Thursday: Snow likely, mainly before noon. Mostly cloudy, with a high near 39. Windy, with a northwest wind 29 to 32 mph, with gusts as high as 44 mph.

    High: 39 °F

    Snow Likely
    and Windy

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 22. Blustery.

    Low: 22 °F

    Chance Snow
    and Blustery

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. West wind 5 to 7 mph becoming southeast in the evening.
Monday
Mostly sunny, with a high near 72. South southwest wind around 6 mph becoming light and variable.
Monday Night
Partly cloudy, with a low around 44. Northeast wind around 6 mph becoming south after midnight.
Tuesday
Mostly sunny, with a high near 80. South southwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 50. South southeast wind 7 to 9 mph.
Wednesday
Rain likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 72. South wind 7 to 16 mph becoming west in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Wednesday Night
Rain showers before midnight, then rain between midnight and 3am, then rain and snow after 3am. Some thunder is also possible. Low around 28. Blustery, with a west northwest wind 18 to 28 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely, mainly before noon. Mostly cloudy, with a high near 39. Windy, with a northwest wind 29 to 32 mph, with gusts as high as 44 mph.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 22. Blustery.
Friday
A chance of snow. Mostly cloudy, with a high near 38.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 18.
Saturday
A chance of snow. Partly sunny, with a high near 41.
Saturday Night
A slight chance of snow. Mostly cloudy, with a low around 21.
Sunday
A slight chance of snow. Mostly sunny, with a high near 46.
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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:
12:31 pm MDT Apr 19, 2026
Forecast Valid:
5pm MDT Apr 19, 2026-6pm MDT Apr 26, 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