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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Lewistown Divide MT-200 MP 90.3 (MTLEW)

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

NA

72°F

22°C

Humidity 29%
Wind Speed E 5 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 04 Oct 01:15 PM MDT
Extended Forecast for

Lewistown MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. Light and variable wind.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. East wind 5 to 9 mph becoming southwest after midnight.

    Low: 54 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83. West northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Light and variable wind becoming northwest around 6 mph in the afternoon.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. Light and variable wind.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 75. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. North wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 79. Light and variable wind.
Tonight
Mostly clear, with a low around 54. East wind 5 to 9 mph becoming southwest after midnight.
Monday
Sunny, with a high near 83. West northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Monday Night
Mostly clear, with a low around 50. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 77. Light and variable wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 46. Light and variable wind.
Wednesday
Sunny, with a high near 75. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 44. North wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 47.
Saturday
A chance of rain. Partly sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.4°W (Elev. 3999 ft)
Last Update:
12:31 pm MDT Oct 4, 2026
Forecast Valid:
1pm MDT Oct 4, 2026-6pm MDT Oct 10, 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