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

63°F

17°C

Humidity 72%
Wind Speed N 6 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 04 Aug 11:05 PM MDT
Extended Forecast for

Lewistown MTSimilar City Names

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 52. South southwest wind around 6 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 75. Southwest wind 5 to 10 mph becoming west northwest 11 to 16 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 75 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. West northwest wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 21 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. South southwest wind 5 to 7 mph becoming west northwest in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 53. Northwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 53 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Calm wind becoming north northwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 49. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 69. West northwest wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 52. South southwest wind around 6 mph. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 75. Southwest wind 5 to 10 mph becoming west northwest 11 to 16 mph in the afternoon. Winds could gust as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 49. West northwest wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 21 mph.
Wednesday
Sunny, with a high near 83. South southwest wind 5 to 7 mph becoming west northwest in the afternoon.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Calm wind becoming north northwest 5 to 8 mph in the afternoon.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 49. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 69. West northwest wind 6 to 16 mph, with gusts as high as 26 mph.
Friday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 51.
Monday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MTSimilar City Names
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
10:24 pm MDT Aug 4, 2025
Forecast Valid:
11pm MDT Aug 4, 2025-6pm MDT Aug 11, 2025
 
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Additional Resources

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Chance of Precipitation