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

39°F

4°C

Humidity 60%
Wind Speed W 6 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 04 Apr 08:20 PM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Mostly clear, with a low around 30. West northwest wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 51. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 28. East wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 50. East southeast wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 50 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. Southeast wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 67. South southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 67 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 25. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 25 °F

    Chance
    Rain/Snow and
    Blustery

  • Wednesday

    Wednesday: A chance of snow. Partly sunny, with a high near 42. West northwest wind 17 to 20 mph, with gusts as high as 30 mph.

    High: 42 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A chance of snow, mainly after midnight. Mostly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 30. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 51. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 28. East wind 7 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 50. East southeast wind 7 to 13 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 36. Southeast wind 8 to 11 mph, with gusts as high as 21 mph.
Tuesday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 67. South southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph.
Tuesday Night
A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 25. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday
A chance of snow. Partly sunny, with a high near 42. West northwest wind 17 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
A chance of snow, mainly after midnight. Mostly cloudy, with a low around 21.
Thursday
A chance of snow before 3pm, then a chance of rain and snow. Partly sunny, with a high near 45.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 25.
Friday
A slight chance of rain and snow. Mostly sunny, with a high near 52.
Friday Night
A slight chance of rain and snow. Partly cloudy, with a low around 28.
Saturday
A slight chance of rain and snow. Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.09°N 109.46°W (Elev. 3898 ft)
Last Update:
4:21 pm MDT Apr 4, 2026
Forecast Valid:
8pm MDT Apr 4, 2026-6pm MDT Apr 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation