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

Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Partly Cloudy

28°F

-2°C

Humidity 58%
Wind Speed E 8 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 03 Nov 07:05 AM MST
Extended Forecast for

Lewistown MT

  • Today

    Today: Increasing clouds, with a high near 51. Southeast wind around 6 mph.

    High: 51 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 20 percent chance of rain after 3am. Cloudy, with a low around 35. Southeast wind around 6 mph.

    Low: 35 °F

    Cloudy then
    Slight Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain before 11am. Mostly cloudy, with a high near 52. West wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 52 °F

    Chance Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. West northwest wind around 6 mph becoming light and variable.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38. South southeast wind 10 to 14 mph becoming west southwest after midnight. Winds could gust as high as 24 mph.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 54. Breezy, with a west wind 14 to 23 mph, with gusts as high as 34 mph.

    High: 54 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 31. Southwest wind 9 to 18 mph, with gusts as high as 30 mph.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 54.

    High: 54 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

Detailed Forecast

Today
Increasing clouds, with a high near 51. Southeast wind around 6 mph.
Tonight
A 20 percent chance of rain after 3am. Cloudy, with a low around 35. Southeast wind around 6 mph.
Tuesday
A 30 percent chance of rain before 11am. Mostly cloudy, with a high near 52. West wind 6 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 29. West northwest wind around 6 mph becoming light and variable.
Wednesday
Mostly cloudy, with a high near 58. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly cloudy, with a low around 38. South southeast wind 10 to 14 mph becoming west southwest after midnight. Winds could gust as high as 24 mph.
Thursday
Mostly sunny, with a high near 54. Breezy, with a west wind 14 to 23 mph, with gusts as high as 34 mph.
Thursday Night
Partly cloudy, with a low around 31. Southwest wind 9 to 18 mph, with gusts as high as 30 mph.
Friday
A slight chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 54.
Friday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
2:21 am MST Nov 3, 2025
Forecast Valid:
7am MST Nov 3, 2025-6pm MST Nov 9, 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