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.

Rain

55°F

13°C

Humidity 93%
Wind Speed N 3 MPH
Barometer 29.68 in (1005.08 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 27 Jun 04:15 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 53. West wind around 5 mph.

    Low: 53 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 66. West northwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Rain and possibly a thunderstorm. Low around 44. West southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Rain

  • Sunday

    Sunday: Rain, with thunderstorms also possible after noon. High near 56. West wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    High: 56 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 41. South southwest wind 18 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.

    Low: 41 °F

    Rain Likely

  • Monday

    Monday: Rain likely, then rain and possibly a thunderstorm after noon. High near 58. Southwest wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.

    High: 58 °F

    Rain

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. Breezy, with a west southwest wind 15 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely and
    Breezy then
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 68. West wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 68 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 53. West wind around 5 mph.
Saturday
Showers and possibly a thunderstorm. High near 66. West northwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Rain and possibly a thunderstorm. Low around 44. West southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain, with thunderstorms also possible after noon. High near 56. West wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Sunday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 41. South southwest wind 18 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.
Monday
Rain likely, then rain and possibly a thunderstorm after noon. High near 58. Southwest wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. Breezy, with a west southwest wind 15 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 70%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 68. West wind 9 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.
Wednesday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 73.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 46.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
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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 ft)
Last Update:
4:37 am MDT Jun 27, 2026
Forecast Valid:
4am MDT Jun 27, 2026-6pm MDT Jul 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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