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

27°F

-3°C

Humidity 73%
Wind Speed ESE 5 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 13 Feb 09:35 PM MST
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 26. South wind around 6 mph.

    Low: 26 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 48. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 11pm. Increasing clouds, with a low around 29. South southwest wind 3 to 7 mph.

    Low: 29 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain and snow. Mostly cloudy, with a high near 46. West wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 46 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A slight chance of rain and snow before 11pm. Mostly cloudy, with a low around 26. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 50. South wind around 6 mph.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 26. East southeast wind around 7 mph.

    Low: 26 °F

    Slight Chance
    Snow

  • Tuesday

    Tuesday: Snow likely. Mostly cloudy, with a high near 39. East wind 6 to 9 mph becoming northwest in the morning.

    High: 39 °F

    Snow Likely

  • Tuesday Night

    Tuesday Night: A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 26. South wind around 6 mph.
Saturday
Partly sunny, with a high near 48. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Saturday Night
A 20 percent chance of rain after 11pm. Increasing clouds, with a low around 29. South southwest wind 3 to 7 mph.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 46. West wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday Night
A slight chance of rain and snow before 11pm. Mostly cloudy, with a low around 26. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 20%.
Washington's Birthday
Mostly sunny, with a high near 50. South wind around 6 mph.
Monday Night
A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 26. East southeast wind around 7 mph.
Tuesday
Snow likely. Mostly cloudy, with a high near 39. East wind 6 to 9 mph becoming northwest in the morning.
Tuesday Night
A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 14.
Wednesday
A chance of snow. Mostly cloudy, with a high near 30.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 13.
Thursday
A chance of snow. Mostly cloudy, with a high near 35.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 13.
Friday
A chance of snow. Mostly cloudy, with a high near 32.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
4:32 pm MST Feb 13, 2026
Forecast Valid:
9pm MST Feb 13, 2026-6pm MST Feb 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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