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.

Partly Cloudy

N/A

Humidity 41%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 08 Jun 08:40 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 70. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 44. East southeast wind 8 to 15 mph, with gusts as high as 24 mph.

    Low: 44 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East southeast wind 5 to 7 mph becoming west in the afternoon.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 4am. Mostly cloudy, with a low around 47. South southwest wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 40%.

    Low: 47 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 69. West northwest wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 69 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Partly cloudy, with a low around 41. West wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    Low: 41 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 62. West northwest wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 62 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Northwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Juneteenth
Mostly sunny, with a high near 70. East wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 44. East southeast wind 8 to 15 mph, with gusts as high as 24 mph.
Saturday
A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East southeast wind 5 to 7 mph becoming west in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 4am. Mostly cloudy, with a low around 47. South southwest wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 69. West northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Partly cloudy, with a low around 41. West wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 62. West northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 40. Northwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.
Tuesday
Sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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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:
12:32 pm MDT Jun 19, 2026
Forecast Valid:
2pm MDT Jun 19, 2026-6pm MDT Jun 25, 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