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

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 58. North northeast wind around 6 mph. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 1am, then a slight chance of rain between 1am and 2am. Low around 35. East northeast wind around 6 mph becoming south southwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 35 °F

    Showers then
    Chance Rain

  • Monday

    Monday: A 30 percent chance of rain, mainly after 3pm. Partly sunny, with a high near 56. South wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 56 °F

    Partly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 7 to 9 mph.

    Low: 34 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. West wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 5 to 13 mph, with gusts 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 57. West southwest wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 57 °F

    Cloudy then
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain before midnight, then rain and snow between midnight and 3am, then snow after 3am. Cloudy, with a low around 26. West northwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 26 °F

    Rain then
    Rain/Snow

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 36.

    High: 36 °F

    Snow Likely

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 58. North northeast wind around 6 mph. Chance of precipitation is 60%.
Tonight
Rain and possibly a thunderstorm before 1am, then a slight chance of rain between 1am and 2am. Low around 35. East northeast wind around 6 mph becoming south southwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of rain, mainly after 3pm. Partly sunny, with a high near 56. South wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 7 to 9 mph.
Tuesday
Mostly sunny, with a high near 59. West wind 9 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 5 to 13 mph, with gusts as high as 21 mph.
Wednesday
A 40 percent chance of rain after noon. Mostly cloudy, with a high near 57. West southwest wind 8 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Rain before midnight, then rain and snow between midnight and 3am, then snow after 3am. Cloudy, with a low around 26. West northwest wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday
Snow likely. Mostly cloudy, with a high near 36.
Thursday Night
A chance of snow before midnight. Mostly cloudy, with a low around 17.
Friday
A chance of snow. Partly sunny, with a high near 42.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 23.
Saturday
A chance of rain and snow. Partly sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
12:32 pm MDT Apr 12, 2026
Forecast Valid:
4pm MDT Apr 12, 2026-6pm MDT Apr 19, 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