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 72%
Wind Speed W 8 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 27 Jun 08:20 PM MDT
Extended Forecast for

Lewistown MT

  • Today

    Today: Partly sunny, with a high near 75. Light and variable wind becoming east southeast 8 to 13 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 75 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 2am. Low around 51. East southeast wind 5 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Sunny during the morning, then mostly cloudy during the afternoon, with a high near 77. Calm wind becoming north northwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.

    High: 77 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. Northwest wind around 5 mph becoming calm.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. South wind around 5 mph becoming calm.

    High: 86 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South southeast wind around 6 mph becoming light and variable after midnight.

    Low: 52 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 81. Light and variable wind becoming west northwest around 6 mph in the morning.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. South southeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 75. Light and variable wind becoming east southeast 8 to 13 mph in the afternoon. Winds could gust as high as 22 mph.
Tonight
Showers and thunderstorms, mainly before 2am. Low around 51. East southeast wind 5 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Sunny during the morning, then mostly cloudy during the afternoon, with a high near 77. Calm wind becoming north northwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.
Tuesday Night
Mostly clear, with a low around 51. Northwest wind around 5 mph becoming calm.
Wednesday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. South wind around 5 mph becoming calm.
Wednesday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South southeast wind around 6 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 81. Light and variable wind becoming west northwest around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 52. South southeast wind 5 to 7 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
10:21 am MDT Jul 6, 2026
Forecast Valid:
11am MDT Jul 6, 2026-6pm MDT Jul 12, 2026
 
Forecast Discussion
 
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Additional Resources

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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