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

25°C

77°F

Humidity 31%
Wind Speed NNW 5 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 7°C (44°F)
Visibility 16 km
Heat Index26°C (78°F)
Last update 12 Jul 08:54 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Mostly clear, with a low around 13. Northwest wind around 11 km/h becoming south after midnight.

    Low: 13 °C

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 31. South southwest wind 10 to 13 km/h becoming northwest in the afternoon.

    High: 31 °C

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 13. North northwest wind 8 to 11 km/h becoming southeast in the evening.

    Low: 13 °C

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after noon. Sunny, with a high near 30. South southwest wind 8 to 16 km/h becoming north northwest in the afternoon. Winds could gust as high as 32 km/h.

    High: 30 °C

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 9. North wind 13 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%.

    Low: 9 °C

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 14. East northeast wind 11 to 18 km/h, with gusts as high as 34 km/h. Chance of precipitation is 80%.

    High: 14 °C

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 7. East northeast wind 10 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 60%.

    Low: 7 °C

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 17. East northeast wind around 11 km/h.

    High: 17 °C

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 6.

    Low: 6 °C

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 13. Northwest wind around 11 km/h becoming south after midnight.
Sunday
Sunny, with a high near 31. South southwest wind 10 to 13 km/h becoming northwest in the afternoon.
Sunday Night
Mostly clear, with a low around 13. North northwest wind 8 to 11 km/h becoming southeast in the evening.
Monday
A 20 percent chance of showers after noon. Sunny, with a high near 30. South southwest wind 8 to 16 km/h becoming north northwest in the afternoon. Winds could gust as high as 32 km/h.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 9. North wind 13 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 14. East northeast wind 11 to 18 km/h, with gusts as high as 34 km/h. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 7. East northeast wind 10 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 60%.
Wednesday
A chance of showers. Partly sunny, with a high near 17. East northeast wind around 11 km/h.
Wednesday Night
Partly cloudy, with a low around 6.
Thursday
Sunny, with a high near 23.
Thursday Night
Partly cloudy, with a low around 9.
Friday
Mostly sunny, with a high near 26.
Friday Night
Mostly clear, with a low around 11.
Saturday
Sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 m)
Last Update:
8:28 pm MDT Jul 12, 2025
Forecast Valid:
9pm MDT Jul 12, 2025-6pm MDT Jul 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation