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

Lewistown Divide MT-200 MP 90.3 (MTLEW)

Lat: 47.07579°NLon: 109.26247°WElev: 4723.0ft.

NA

47°F

8°C

Humidity 40%
Wind Speed ESE 13 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 18 Oct 07:30 PM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Mostly clear, with a low around 36. East southeast wind 5 to 13 mph, with gusts as high as 22 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. Southwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. South southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 56. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 35. Light and variable wind.

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 68. South southeast wind around 6 mph.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44. South wind 5 to 10 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. South wind 3 to 7 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of rain after midnight. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 36. East southeast wind 5 to 13 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 72. Southwest wind 5 to 7 mph becoming calm in the afternoon.
Monday Night
Partly cloudy, with a low around 41. South southeast wind 5 to 7 mph becoming calm after midnight.
Tuesday
Mostly sunny, with a high near 56. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 35. Light and variable wind.
Wednesday
Sunny, with a high near 68. South southeast wind around 6 mph.
Wednesday Night
Mostly clear, with a low around 44. South wind 5 to 10 mph.
Thursday
Sunny, with a high near 74. South wind 3 to 7 mph.
Thursday Night
A chance of rain after midnight. Mostly cloudy, with a low around 43.
Friday
Rain. Mostly cloudy, with a high near 51. Breezy.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 30. Blustery.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Mostly sunny, with a high near 48.
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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:
12:31 pm MDT Oct 18, 2026
Forecast Valid:
7pm MDT Oct 18, 2026-6pm MDT Oct 25, 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