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.

Mostly Cloudy

45°F

7°C

Humidity 45%
Wind Speed SSW 3 MPH
Barometer 29.66 in (1004.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 14 Apr 10:35 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. Southwest wind around 6 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 58. West southwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 58 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain showers before midnight, then rain and snow showers between midnight and 3am, then snow showers after 3am. Some thunder is also possible. Low around 26. West wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Showers then
    Rain/Snow

  • Thursday

    Thursday: Snow showers likely, mainly before noon. Patchy blowing snow after 9am. Mostly cloudy, with a high near 35. Northwest wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 35 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow showers before midnight. Patchy blowing snow before 9pm. Mostly cloudy, with a low around 16. Northwest wind 9 to 17 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.

    Low: 16 °F

    Chance Snow
    Showers and
    Patchy
    Blowing Snow

  • Friday

    Friday: A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 41. West wind 9 to 16 mph, with gusts as high as 26 mph. Little or no snow accumulation expected.

    High: 41 °F

    Chance Snow

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22. North northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53. Southwest wind around 9 mph, with gusts as high as 20 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 37. Southwest wind around 6 mph.
Wednesday
Showers likely, mainly after 5pm. Mostly cloudy, with a high near 58. West southwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Wednesday Night
Rain showers before midnight, then rain and snow showers between midnight and 3am, then snow showers after 3am. Some thunder is also possible. Low around 26. West wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly before noon. Patchy blowing snow after 9am. Mostly cloudy, with a high near 35. Northwest wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday Night
A 30 percent chance of snow showers before midnight. Patchy blowing snow before 9pm. Mostly cloudy, with a low around 16. Northwest wind 9 to 17 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.
Friday
A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 41. West wind 9 to 16 mph, with gusts as high as 26 mph. Little or no snow accumulation expected.
Friday Night
Partly cloudy, with a low around 22. North northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph.
Saturday
Sunny, with a high near 53. Southwest wind around 9 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 70.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 40.
Tuesday
A chance of rain. Partly sunny, with a high near 65.
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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:
9:32 pm MDT Apr 14, 2026
Forecast Valid:
10pm MDT Apr 14, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation