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.

Clear

N/A

Humidity 80%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 05 Apr 02:15 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Today

    Today: A chance of rain before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a chance of rain after 5pm. Partly sunny, with a high near 57. South southwest wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    High: 57 °F

    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of rain between 9pm and midnight. Mostly cloudy, with a low around 34. West wind 8 to 10 mph.

    Low: 34 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. West southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. West wind 8 to 13 mph becoming light southwest. Winds could gust as high as 21 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain after noon. Mostly cloudy, with a high near 58. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain before midnight, then rain and snow. Low around 27. West southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Rain then
    Rain/Snow

  • Thursday

    Thursday: Snow. High near 36. Northwest wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 36 °F

    Snow

  • Thursday Night

    Thursday Night: A chance of snow, mainly before midnight. Mostly cloudy, with a low around 17. Blustery, with a west wind 15 to 22 mph, with gusts as high as 30 mph.

    Low: 17 °F

    Chance Snow
    and Blustery

  • Friday

    Friday: A chance of snow, mainly after noon. Partly sunny, with a high near 41. Breezy.

    High: 41 °F

    Chance Snow
    and Breezy

Detailed Forecast

Today
A chance of rain before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a chance of rain after 5pm. Partly sunny, with a high near 57. South southwest wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Tonight
A 30 percent chance of rain between 9pm and midnight. Mostly cloudy, with a low around 34. West wind 8 to 10 mph.
Tuesday
Mostly sunny, with a high near 60. West southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 36. West wind 8 to 13 mph becoming light southwest. Winds could gust as high as 21 mph.
Wednesday
A 40 percent chance of rain after noon. Mostly cloudy, with a high near 58. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Rain before midnight, then rain and snow. Low around 27. West southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow. High near 36. Northwest wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday Night
A chance of snow, mainly before midnight. Mostly cloudy, with a low around 17. Blustery, with a west wind 15 to 22 mph, with gusts as high as 30 mph.
Friday
A chance of snow, mainly after noon. Partly sunny, with a high near 41. Breezy.
Friday Night
Partly cloudy, with a low around 21.
Saturday
A slight chance of rain and snow. Mostly sunny, with a high near 53.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
3:32 am MDT Apr 13, 2026
Forecast Valid:
7am MDT Apr 13, 2026-6pm MDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation