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

54°F

12°C

Humidity 87%
Wind Speed SSW 6 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 07 Jun 02:05 AM MDT
Extended Forecast for

Lewistown MTSimilar City Names

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely after 3am. Cloudy, with a low around 42. West wind 3 to 6 mph. Chance of precipitation is 70%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely before 3pm, then a chance of showers. Mostly cloudy, with a high near 56. West northwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 56 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. West wind 6 to 14 mph becoming south southeast after midnight. Winds could gust as high as 25 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 71. South wind around 8 mph, with gusts as high as 20 mph.

    High: 71 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 45. South southwest wind 5 to 8 mph becoming southeast in the evening.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. West northwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%.

    High: 68 °F

    Mostly Cloudy
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. West wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

    Low: 41 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 60. Breezy, with a west northwest wind 13 to 23 mph, with gusts as high as 32 mph.

    High: 60 °F

    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 39. Breezy.

    Low: 39 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely after 3am. Cloudy, with a low around 42. West wind 3 to 6 mph. Chance of precipitation is 70%.
Sunday
Showers and thunderstorms likely before 3pm, then a chance of showers. Mostly cloudy, with a high near 56. West northwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Sunday Night
Mostly clear, with a low around 36. West wind 6 to 14 mph becoming south southeast after midnight. Winds could gust as high as 25 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 71. South wind around 8 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 45. South southwest wind 5 to 8 mph becoming southeast in the evening.
Tuesday
Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. West northwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. West wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Wednesday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 60. Breezy, with a west northwest wind 13 to 23 mph, with gusts as high as 32 mph.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 39. Breezy.
Thursday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 63.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 39.
Friday
A chance of rain and thunderstorms. Partly sunny, with a high near 65.
Friday Night
A chance of rain and thunderstorms. Partly cloudy, with a low around 40.
Saturday
A chance of rain and thunderstorms. Partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MTSimilar City Names
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
12:32 am MDT Jun 7, 2026
Forecast Valid:
2am MDT Jun 7, 2026-6pm MDT Jun 13, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation