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

Lewistown MT

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 56. Southeast wind around 7 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Light southeast wind becoming east southeast 15 to 20 mph in the morning. Winds could gust as high as 28 mph.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 51. East southeast wind 12 to 17 mph becoming light south after midnight. Winds could gust as high as 26 mph.

    Low: 51 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 85 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. Southeast wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. East wind 5 to 7 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89. Calm wind becoming east southeast 5 to 7 mph in the afternoon.

    High: 89 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 56. Southeast wind around 7 mph.
Tuesday
Mostly sunny, with a high near 90. Light southeast wind becoming east southeast 15 to 20 mph in the morning. Winds could gust as high as 28 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 51. East southeast wind 12 to 17 mph becoming light south after midnight. Winds could gust as high as 26 mph.
Wednesday
A slight chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 52. Southeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 88. Light and variable wind.
Thursday Night
Partly cloudy, with a low around 54. East wind 5 to 7 mph.
Friday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89. Calm wind becoming east southeast 5 to 7 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 50.
Saturday
Rain likely before noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 71.
Saturday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 44.
Sunday
A chance of rain and thunderstorms. Partly sunny, with a high near 70.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Monday
A chance of rain and thunderstorms. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.09°N 109.46°W (Elev. 3898 ft)
Last Update:
12:32 am MDT May 26, 2026
Forecast Valid:
3am MDT May 26, 2026-6pm MDT Jun 1, 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