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

  • Today

    Today: Mostly sunny, with a high near 72. Light and variable wind becoming north northwest 5 to 7 mph in the morning.

    High: 72 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 44. North wind around 6 mph becoming south after midnight.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. South wind around 6 mph becoming calm.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. South southeast wind 7 to 9 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm, mainly after 3pm. Partly sunny, with a high near 73. 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: 73 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain before 3am, then rain and snow. Some thunder is also possible. Low around 27. Blustery, with a west northwest wind 16 to 21 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Showers then
    Rain/Snow and
    Blustery

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 37. Windy, with a northwest wind 29 to 32 mph, with gusts as high as 44 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 37 °F

    Snow Likely
    and Windy

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 22. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 37 mph.

    Low: 22 °F

    Chance Snow
    and Blustery

  • Friday

    Friday: A chance of snow. Partly sunny, with a high near 36. Breezy.

    High: 36 °F

    Chance Snow
    and Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 72. Light and variable wind becoming north northwest 5 to 7 mph in the morning.
Tonight
Partly cloudy, with a low around 44. North wind around 6 mph becoming south after midnight.
Tuesday
Mostly sunny, with a high near 79. South wind around 6 mph becoming calm.
Tuesday Night
Mostly cloudy, with a low around 49. South southeast wind 7 to 9 mph.
Wednesday
Showers likely and possibly a thunderstorm, mainly after 3pm. Partly sunny, with a high near 73. 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 before 3am, then rain and snow. Some thunder is also possible. Low around 27. Blustery, with a west northwest wind 16 to 21 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely. Mostly cloudy, with a high near 37. Windy, with a northwest wind 29 to 32 mph, with gusts as high as 44 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 22. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 37 mph.
Friday
A chance of snow. Partly sunny, with a high near 36. Breezy.
Friday Night
A slight chance of snow before midnight. Mostly cloudy, with a low around 19.
Saturday
A slight chance of snow. Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 19.
Sunday
A slight chance of snow. Partly sunny, with a high near 42.
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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:
4:21 am MDT Apr 20, 2026
Forecast Valid:
5am MDT Apr 20, 2026-6pm MDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation