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.

NA

N/A

Humidity 48%
Wind Speed W 8 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 15 Apr 02:05 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Partly cloudy, with a low around 28. Northwest wind 6 to 9 mph becoming south southeast after midnight.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 65. Light and variable wind becoming west 5 to 7 mph in the afternoon.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. West wind 7 to 10 mph becoming south in the evening.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 71. Southwest wind 6 to 8 mph becoming northwest in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. North wind around 7 mph becoming south after midnight.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. South wind 6 to 8 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49. South southeast wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain after noon. Partly sunny, with a high near 70. South wind 10 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 70 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain showers before midnight, then rain between midnight and 3am, then rain and snow after 3am. Some thunder is also possible. Cloudy, with a low around 28. Blustery.

    Low: 28 °F

    Showers then
    Rain/Snow and
    Blustery

Detailed Forecast

Tonight
Partly cloudy, with a low around 28. Northwest wind 6 to 9 mph becoming south southeast after midnight.
Sunday
Sunny, with a high near 65. Light and variable wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 40. West wind 7 to 10 mph becoming south in the evening.
Monday
Mostly sunny, with a high near 71. Southwest wind 6 to 8 mph becoming northwest in the afternoon.
Monday Night
Partly cloudy, with a low around 44. North wind around 7 mph becoming south after midnight.
Tuesday
Mostly sunny, with a high near 78. South wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 49. South southeast wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
A chance of rain after noon. Partly sunny, with a high near 70. South wind 10 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Rain showers before midnight, then rain between midnight and 3am, then rain and snow after 3am. Some thunder is also possible. Cloudy, with a low around 28. Blustery.
Thursday
Snow. Mostly cloudy, with a high near 39. Windy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 21. Blustery.
Friday
A chance of snow. Partly sunny, with a high near 41.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 22.
Saturday
A slight 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 Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
2:12 pm MDT Apr 18, 2026
Forecast Valid:
4pm MDT Apr 18, 2026-6pm MDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation