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.

Mostly Cloudy

N/A

Humidity 36%
Wind Speed WNW 16 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 07 May 12:54 PM MDT
Extended Forecast for

6 Miles SSW Lewistown Municipal MT

  • Memorial Day

    Memorial Day: Sunny, with a high near 84. South southwest wind 5 to 7 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 11pm and midnight. Increasing clouds, with a low around 55. South southeast wind 6 to 10 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 86. East southeast wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 55. East southeast wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph.

    Low: 55 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Light and variable wind becoming east 5 to 7 mph in the morning.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 54. East southeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 85. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56. East wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Memorial Day
Sunny, with a high near 84. South southwest wind 5 to 7 mph.
Tonight
A slight chance of showers between 11pm and midnight. Increasing clouds, with a low around 55. South southeast wind 6 to 10 mph. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 86. East southeast wind 5 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 55. East southeast wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph.
Wednesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Light and variable wind becoming east 5 to 7 mph in the morning.
Wednesday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 54. East southeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 85. Calm wind becoming east northeast around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 56. East wind 6 to 10 mph, with gusts as high as 18 mph.
Friday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
Friday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 52.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69.
Saturday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 47.
Sunday
A chance of rain and thunderstorms. Partly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSW Lewistown Municipal MT
 46.98°N 109.51°W (Elev. 4403 ft)
Last Update:
12:56 pm MDT May 25, 2026
Forecast Valid:
1pm MDT May 25, 2026-6pm MDT May 31, 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