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

60°F

16°C

Humidity 36%
Wind Speed WNW 16 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 07 May 12:54 PM MDT
Extended Forecast for

Lewistown MT

  • Today

    Today: A chance of rain and thunderstorms before 2pm, then a chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly cloudy, with a high near 59. West northwest wind around 8 mph. Chance of precipitation is 30%.

    High: 59 °F

    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 9pm and 10pm. Partly cloudy, with a low around 37. West northwest wind around 6 mph becoming south southeast after midnight.

    Low: 37 °F

    Chance Rain
    then Partly
    Cloudy

  • Sunday

    Sunday: Sunny, with a high near 77. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46. Southwest wind 6 to 8 mph becoming southeast in the evening.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 72. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. North northwest wind 9 to 14 mph becoming light and variable in the evening. Winds could gust as high as 21 mph.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. East southeast wind 3 to 5 mph.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48. East southeast wind 6 to 9 mph.

    Low: 48 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of rain and thunderstorms before 2pm, then a chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly cloudy, with a high near 59. West northwest wind around 8 mph. Chance of precipitation is 30%.
Tonight
A 30 percent chance of rain, mainly between 9pm and 10pm. Partly cloudy, with a low around 37. West northwest wind around 6 mph becoming south southeast after midnight.
Sunday
Sunny, with a high near 77. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 46. Southwest wind 6 to 8 mph becoming southeast in the evening.
Monday
Sunny, with a high near 72. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Monday Night
Mostly clear, with a low around 38. North northwest wind 9 to 14 mph becoming light and variable in the evening. Winds could gust as high as 21 mph.
Tuesday
Sunny, with a high near 76. East southeast wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 48. East southeast wind 6 to 9 mph.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 75.
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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:
9:46 am MDT May 9, 2026
Forecast Valid:
11am MDT May 9, 2026-6pm MDT May 15, 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