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

63°F

17°C

Humidity 16%
Wind Speed N 9 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 28 Mar 03:20 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 34. West wind around 7 mph.

    Low: 34 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain after 3pm. Increasing clouds, with a high near 56. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.

    High: 56 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 32. North wind 5 to 8 mph becoming southeast after midnight. Chance of precipitation is 70%.

    Low: 32 °F

    Rain Likely

  • Monday

    Monday: Rain likely before 9am, then snow likely. Mostly cloudy, with a high near 42. West northwest wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Monday Night

    Monday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around 15. Northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 30 mph.

    Low: 15 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. West northwest wind 5 to 8 mph becoming south southeast in the afternoon.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. South southeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57. South wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 34. West wind around 7 mph.
Sunday
A 20 percent chance of rain after 3pm. Increasing clouds, with a high near 56. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.
Sunday Night
Rain likely. Mostly cloudy, with a low around 32. North wind 5 to 8 mph becoming southeast after midnight. Chance of precipitation is 70%.
Monday
Rain likely before 9am, then snow likely. Mostly cloudy, with a high near 42. West northwest wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 15. Northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 30 mph.
Tuesday
Mostly sunny, with a high near 42. West northwest wind 5 to 8 mph becoming south southeast in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 24. South southeast wind around 10 mph, with gusts as high as 18 mph.
Wednesday
Mostly sunny, with a high near 57. South wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 32.
Thursday
A chance of rain before 9am, then a chance of rain and snow between 9am and noon, then rain likely after noon. Mostly cloudy, with a high near 50. Breezy.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 23. Blustery.
Friday
A chance of snow. Mostly cloudy, with a high near 40. Breezy.
Friday Night
A chance of snow. Mostly cloudy, with a low around 23.
Saturday
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 Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
12:31 pm MDT Mar 28, 2026
Forecast Valid:
3pm MDT Mar 28, 2026-6pm MDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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