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

63°F

17°C

Humidity 39%
Wind Speed ESE 5 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 30 Jun 11:00 PM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Mostly clear, with a low around 55. East southeast wind 5 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. North wind around 6 mph becoming light and variable after midnight.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91. Calm wind becoming south southeast 5 to 7 mph in the afternoon.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 58. South southwest wind 5 to 9 mph.

    Low: 58 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 7 mph in the morning.

    High: 85 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 56. West wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Independence Day

    Independence Day: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 77. Light and variable wind becoming west northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 55. East southeast wind 5 to 9 mph.
Tuesday
Sunny, with a high near 89. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 58. North wind around 6 mph becoming light and variable after midnight.
Wednesday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91. Calm wind becoming south southeast 5 to 7 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 58. South southwest wind 5 to 9 mph.
Thursday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 7 mph in the morning.
Thursday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 56. West wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 50%.
Independence Day
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 77. Light and variable wind becoming west northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
10:13 pm MDT Jun 30, 2025
Forecast Valid:
11pm MDT Jun 30, 2025-6pm MDT Jul 7, 2025
 
Forecast Discussion
 
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Additional Resources

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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