National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Mostly Cloudy

50°F

10°C

Humidity 52%
Wind Speed SW 18 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 Nov 04:54 PM MST
Extended Forecast for

Lewistown Municipal MT

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Cloudy, with a steady temperature around 50. West wind around 14 mph, with gusts as high as 24 mph.

    High: 50 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain between 9pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 37. West wind 11 to 14 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 58. West northwest wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 58 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 32. West southwest wind around 7 mph becoming south after midnight.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 56. Southeast wind 5 to 7 mph.

    High: 56 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 34. East southeast wind 6 to 8 mph.

    Low: 34 °F

    Chance Rain

  • Monday

    Monday: A 40 percent chance of rain. Mostly cloudy, with a high near 52. East southeast wind around 7 mph.

    High: 52 °F

    Chance Rain

  • Monday Night

    Monday Night: A chance of rain and snow before 11pm, then a chance of rain between 11pm and 2am, then a chance of rain and snow after 2am. Mostly cloudy, with a low around 32. East southeast wind around 7 mph becoming south after midnight.

    Low: 32 °F

    Chance
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow, mainly before 11am. Partly sunny, with a high near 45.

    High: 45 °F

    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Cloudy, with a steady temperature around 50. West wind around 14 mph, with gusts as high as 24 mph.
Tonight
A 20 percent chance of rain between 9pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 37. West wind 11 to 14 mph, with gusts as high as 25 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 58. West northwest wind 10 to 14 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 32. West southwest wind around 7 mph becoming south after midnight.
Sunday
Partly sunny, with a high near 56. Southeast wind 5 to 7 mph.
Sunday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 34. East southeast wind 6 to 8 mph.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 52. East southeast wind around 7 mph.
Monday Night
A chance of rain and snow before 11pm, then a chance of rain between 11pm and 2am, then a chance of rain and snow after 2am. Mostly cloudy, with a low around 32. East southeast wind around 7 mph becoming south after midnight.
Tuesday
A chance of rain and snow, mainly before 11am. Partly sunny, with a high near 45.
Tuesday Night
A chance of rain and snow, mainly before 11pm. Mostly cloudy, with a low around 29.
Wednesday
A chance of snow. Partly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A slight chance of rain and snow. Partly sunny, with a high near 42.
Thursday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 23.
Friday
Partly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.49°W (Elev. 4183 ft)
Last Update:
4:53 pm MST Nov 14, 2025
Forecast Valid:
5pm MST Nov 14, 2025-6pm MST Nov 21, 2025
 
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