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

Atmospheric River Continues to Impact the Northwest U.S.; Gusty to High Winds in the Northeast U.S.

A strong atmospheric river will continue moderate to heavy rainfall with possible flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. into Thursday. Additional impacts are likely into Friday with a cold front. A fast-moving storm system will cross the Northeast U.S. Wednesday into Thursday with gusty to high winds and areas of rain and high elevation snow showers. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

28°F

-2°C

Humidity 92%
Wind Speed SE 3 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 05 Nov 04:54 AM MST
Extended Forecast for

Lewistown MT

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 60. Southeast wind 7 to 9 mph.

    High: 60 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 36. Southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 55. Breezy, with a west wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 55 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. West southwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 33 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of rain, mainly between 11am and 5pm. Partly sunny, with a high near 52. Breezy, with a southwest wind 8 to 13 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 52 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: A slight chance of rain and snow before 8pm, then a slight chance of snow. Mostly cloudy, with a low around 27. Breezy, with a west wind 20 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Breezy.
    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 42. West northwest wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 42 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 21. Northwest wind around 6 mph becoming south after midnight.

    Low: 21 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 60. Southeast wind 7 to 9 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 36. Southwest wind around 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 55. Breezy, with a west wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.
Thursday Night
Mostly clear, with a low around 31. West southwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 33 mph.
Friday
A 30 percent chance of rain, mainly between 11am and 5pm. Partly sunny, with a high near 52. Breezy, with a southwest wind 8 to 13 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.
Friday Night
A slight chance of rain and snow before 8pm, then a slight chance of snow. Mostly cloudy, with a low around 27. Breezy, with a west wind 20 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 42. West northwest wind 10 to 16 mph, with gusts as high as 28 mph.
Saturday Night
Mostly cloudy, with a low around 21. Northwest wind around 6 mph becoming south after midnight.
Sunday
Partly sunny, with a high near 50.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Partly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 38.
Veterans Day
Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.09°N 109.46°W (Elev. 3898 ft)
Last Update:
2:29 am MST Nov 5, 2025
Forecast Valid:
5am MST Nov 5, 2025-6pm MST Nov 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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