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.

light rain,mist

54°F

12°C

Humidity 100%
Wind Speed N 6 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 54°F (12°C)
Visibility 3.50 mi
Last update 15 Jul 02:05 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm. Cloudy, with a low around 50. Northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after noon. High near 56. East northeast wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 9pm, then showers likely. Low around 43. Northeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 63. East wind 6 to 9 mph.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. East southeast wind 6 to 9 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 77. South southeast wind 5 to 7 mph becoming north in the afternoon.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 48. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 48 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76. Light and variable wind becoming north 5 to 7 mph in the morning.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Cloudy, with a low around 50. Northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Tuesday
Showers, with thunderstorms also possible after noon. High near 56. East northeast wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm before 9pm, then showers likely. Low around 43. Northeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 40 percent chance of showers, mainly before noon. Partly sunny, with a high near 63. East wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 43. East southeast wind 6 to 9 mph.
Thursday
Sunny, with a high near 77. South southeast wind 5 to 7 mph becoming north in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 48. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 76. Light and variable wind becoming north 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 51.
Saturday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 85.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Sunday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
1:19 am MDT Jul 15, 2025
Forecast Valid:
2am MDT Jul 15, 2025-6pm MDT Jul 21, 2025
 
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