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

N/A

Humidity 80%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 05 Apr 02:15 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 38. West southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 38 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 59. West southwest wind 6 to 8 mph becoming east northeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 36. East wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 36 °F

    Showers then
    Rain Likely

  • Monday

    Monday: Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 52. Southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%.

    High: 52 °F

    Chance Rain
    then Showers

  • Monday Night

    Monday Night: A 50 percent chance of rain before midnight. Mostly cloudy, with a low around 35. West southwest wind 7 to 9 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. West wind 5 to 14 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after noon. Mostly cloudy, with a high near 52. West wind 8 to 16 mph, with gusts as high as 28 mph.

    High: 52 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 9pm, then rain and snow likely between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 38. West southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 59. West southwest wind 6 to 8 mph becoming east northeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 36. East wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 52. Southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%.
Monday Night
A 50 percent chance of rain before midnight. Mostly cloudy, with a low around 35. West southwest wind 7 to 9 mph.
Tuesday
Mostly sunny, with a high near 58. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 35. West wind 5 to 14 mph, with gusts as high as 22 mph.
Wednesday
A chance of rain, mainly after noon. Mostly cloudy, with a high near 52. West wind 8 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Rain likely before 9pm, then rain and snow likely between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 25.
Thursday
Snow likely. Mostly cloudy, with a high near 37.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 17.
Friday
A chance of snow. Partly sunny, with a high near 38.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 20.
Saturday
A slight chance of rain and snow. Mostly sunny, with a high near 48.
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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:
5:02 pm MDT Apr 11, 2026
Forecast Valid:
6pm MDT Apr 11, 2026-6pm MDT Apr 18, 2026
 
Forecast Discussion
 
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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