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

50°F

10°C

Humidity 62%
Wind Speed ESE 7 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill47°F (8°C)
Last update 03 Oct 10:45 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 41. East southeast wind 5 to 8 mph.

    Low: 41 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. Light and variable wind becoming south 6 to 11 mph in the evening.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83. Southwest wind 9 to 14 mph becoming west northwest 15 to 20 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 around 8 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Southwest wind 5 to 7 mph becoming west northwest in the afternoon.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. Light and variable wind becoming south southwest around 5 mph after midnight.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Light and variable wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 41. East southeast wind 5 to 8 mph.
Sunday
Sunny, with a high near 77. Light and variable wind.
Sunday Night
Mostly clear, with a low around 52. Light and variable wind becoming south 6 to 11 mph in the evening.
Monday
Sunny, with a high near 83. Southwest wind 9 to 14 mph becoming west northwest 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Monday Night
Mostly clear, with a low around 50. Southwest wind around 8 mph.
Tuesday
Sunny, with a high near 75. Southwest wind 5 to 7 mph becoming west northwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 46. Light and variable wind becoming south southwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 75. Light and variable wind becoming west northwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 43.
Saturday
A chance of rain. Partly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
10:41 pm MDT Oct 3, 2026
Forecast Valid:
11pm MDT Oct 3, 2026-6pm MDT Oct 10, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation