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Tropical Depression Nine in the Gulf of America; California October Heat Wave Continues

Tropical Depression Nine is forecast to track toward the central U.S. Gulf Coast while strengthening into a tropical storm by early Wednesday and a hurricane on Thursday. Stay tuned to forecast updates. Much higher than typical October temperatures will continue across much of California through midweek. Temperatures are forecast to gradually cool beginning Thursday in Coastal California. Read More >

Current conditions at

Lewistown Divide MT-200 MP 90.3 (MTLEW)

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

NA

67°F

19°C

Humidity 19%
Wind Speed WNW 10 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Last update 06 Oct 09:15 PM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm in the evening.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. East southeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 76. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. Calm wind becoming south 5 to 9 mph in the evening.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82. South southwest wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. West wind 6 to 9 mph.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain, mainly after noon. Mostly cloudy, with a high near 57. West northwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 57 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain and snow, becoming all snow after 3am. Cloudy, with a low around 28.

    Low: 28 °F

    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 73. Calm wind becoming east northeast around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 43. East southeast wind 5 to 7 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 76. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 50. Calm wind becoming south 5 to 9 mph in the evening.
Friday
Mostly sunny, with a high near 82. South southwest wind 9 to 17 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 43. West wind 6 to 9 mph.
Saturday
A chance of rain, mainly after noon. Mostly cloudy, with a high near 57. West northwest wind 6 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Rain and snow, becoming all snow after 3am. Cloudy, with a low around 28.
Sunday
Snow. Cloudy, with a high near 38.
Sunday Night
Snow likely. Mostly cloudy, with a low around 23.
Columbus Day
A chance of snow. Partly sunny, with a high near 41.
Monday Night
A slight chance of rain and snow. Partly cloudy, with a low around 25.
Tuesday
A slight chance of rain and snow. Mostly sunny, with a high near 50.
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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:
5:16 pm MDT Oct 6, 2026
Forecast Valid:
9pm MDT Oct 6, 2026-6pm MDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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