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

82°F

28°C

Humidity 21%
Wind Speed SSE 6 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 26 Aug 02:20 PM MDT
Extended Forecast for

Lewistown MT

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 83. East wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 53. East wind 8 to 13 mph becoming light east southeast after midnight. Winds could gust as high as 21 mph.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 80. Light east southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 23 mph.

    High: 80 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57. East southeast wind 6 to 14 mph, with gusts as high as 22 mph.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 76. East southeast wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    High: 76 °F

    Cloudy then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. East southeast wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 70. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before midnight. Mostly cloudy, with a low around 50. Northeast wind around 6 mph becoming calm after midnight.

    Low: 50 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 83. East wind 8 to 11 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 53. East wind 8 to 13 mph becoming light east southeast after midnight. Winds could gust as high as 21 mph.
Wednesday
Partly sunny, with a high near 80. Light east southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 57. East southeast wind 6 to 14 mph, with gusts as high as 22 mph.
Thursday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 76. East southeast wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. East southeast wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 50%.
Friday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 70. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 50%.
Friday Night
A chance of showers before midnight. Mostly cloudy, with a low around 50. Northeast wind around 6 mph becoming calm after midnight.
Saturday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 51.
Labor Day
Sunny, with a high near 80.
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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:
3:03 am MDT Aug 26, 2025
Forecast Valid:
2pm MDT Aug 26, 2025-6pm MDT Sep 1, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation