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Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

18°F

-8°C

Humidity 67%
Wind Speed W 6 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 20 Jan 08:30 PM MST
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Increasing clouds, with a low around 15. West southwest wind 9 to 17 mph, with gusts as high as 28 mph.

    Low: 15 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a steady temperature around 18. West northwest wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 18 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 3. Wind chill values as low as -5. West northwest wind 5 to 7 mph.

    Low: 3 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 14. Wind chill values as low as -5. West northwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 14 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -8. North northwest wind 5 to 7 mph becoming east after midnight.

    Low: -8 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 10. Light and variable wind becoming west northwest around 5 mph in the afternoon.

    High: 10 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around -3. Light and variable wind.

    Low: -3 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 23. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 23 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 15. West southwest wind 9 to 17 mph, with gusts as high as 28 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a steady temperature around 18. West northwest wind 10 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly cloudy, with a low around 3. Wind chill values as low as -5. West northwest wind 5 to 7 mph.
Thursday
Partly sunny, with a high near 14. Wind chill values as low as -5. West northwest wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around -8. North northwest wind 5 to 7 mph becoming east after midnight.
Friday
Mostly sunny, with a high near 10. Light and variable wind becoming west northwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around -3. Light and variable wind.
Saturday
Partly sunny, with a high near 23. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 44.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
3:44 pm MST Jan 20, 2026
Forecast Valid:
8pm MST Jan 20, 2026-6pm MST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation