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.

Partly Cloudy

N/A

Humidity 41%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 08 Jun 08:40 PM MDT
Extended Forecast for

Lewistown MT

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 70. Light northeast wind becoming east 5 to 10 mph. Winds could gust as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. East southeast wind 7 to 15 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East southeast wind 5 to 7 mph becoming west in the afternoon.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 48. South southwest wind 5 to 8 mph. Chance of precipitation is 40%.

    Low: 48 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 70. West northwest wind around 11 mph, with gusts as high as 21 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Partly cloudy, with a low around 42. North northwest wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    Low: 42 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 63. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.

    High: 63 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Northwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Juneteenth
Mostly sunny, with a high near 70. Light northeast wind becoming east 5 to 10 mph. Winds could gust as high as 20 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. East southeast wind 7 to 15 mph, with gusts as high as 24 mph.
Saturday
A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. East southeast wind 5 to 7 mph becoming west in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 48. South southwest wind 5 to 8 mph. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 70. West northwest wind around 11 mph, with gusts as high as 21 mph.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Partly cloudy, with a low around 42. North northwest wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 63. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 40. Northwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.
Tuesday
Sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.05°N 109.42°W (Elev. 4075 ft)
Last Update:
12:32 pm MDT Jun 19, 2026
Forecast Valid:
12pm MDT Jun 19, 2026-6pm MDT Jun 25, 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