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

N/A

Humidity 36%
Wind Speed WNW 16 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 07 May 12:54 PM MDT
Extended Forecast for

6 Miles N Lewistown MT

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 56. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 56 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers before 9pm, then a slight chance of rain between 9pm and 11pm. Cloudy, with a low around 35. Northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 35 °F

    Chance
    Showers then
    Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms before 4pm, then a slight chance of showers between 4pm and 5pm. Mostly cloudy, with a high near 55. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    High: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. Light and variable wind.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. Light and variable wind becoming south around 5 mph after midnight.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 73. Light and variable wind becoming west around 6 mph in the afternoon.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. Light and variable wind becoming south around 6 mph after midnight.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 56. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tonight
A chance of showers before 9pm, then a slight chance of rain between 9pm and 11pm. Cloudy, with a low around 35. Northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms before 4pm, then a slight chance of showers between 4pm and 5pm. Mostly cloudy, with a high near 55. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 66. Light and variable wind.
Friday Night
Partly cloudy, with a low around 41. Light and variable wind becoming south around 5 mph after midnight.
Saturday
Sunny, with a high near 73. Light and variable wind becoming west around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 46. Light and variable wind becoming south around 6 mph after midnight.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 48.
Memorial Day
Sunny, with a high near 80.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 49.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles N Lewistown MT
 47.15°N 109.44°W (Elev. 4094 ft)
Last Update:
12:31 pm MDT May 20, 2026
Forecast Valid:
12pm MDT May 20, 2026-6pm MDT May 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation