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 MT

  • Overnight

    Overnight: Mostly clear, with a low around 28. East southeast wind around 9 mph.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 66. East southeast wind 6 to 9 mph.

    High: 66 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. East wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 73. South southeast wind 6 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. West wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Sunday

    Sunday: Rain likely, mainly after noon. Partly sunny, with a high near 60. West wind 7 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.

    High: 60 °F

    Slight Chance
    Rain then
    Rain Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 37. North northeast wind 5 to 7 mph becoming southeast after midnight. Chance of precipitation is 90%.

    Low: 37 °F

    Showers

  • Monday

    Monday: Rain likely, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 52. South southwest wind 6 to 8 mph becoming west northwest in the afternoon.

    High: 52 °F

    Showers

  • Monday Night

    Monday Night: A chance of rain, mainly before midnight. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 28. East southeast wind around 9 mph.
Friday
Sunny, with a high near 66. East southeast wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 41. East wind 5 to 9 mph, with gusts as high as 18 mph.
Saturday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 73. South southeast wind 6 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. West wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Sunday
Rain likely, mainly after noon. Partly sunny, with a high near 60. West wind 7 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Sunday Night
Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 37. North northeast wind 5 to 7 mph becoming southeast after midnight. Chance of precipitation is 90%.
Monday
Rain likely, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 52. South southwest wind 6 to 8 mph becoming west northwest in the afternoon.
Monday Night
A chance of rain, mainly before midnight. Mostly cloudy, with a low around 34.
Tuesday
A slight chance of rain after noon. Mostly sunny, with a high near 57.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 52.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 26.
Thursday
A chance of snow. Partly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
12:31 am MDT Apr 10, 2026
Forecast Valid:
3am MDT Apr 10, 2026-6pm MDT Apr 16, 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