Record Heat Remains in Place This Week; Precipitation and Windy Conditions in the Northwest

Record warmth will persist across portions of California, the Southwest U.S., the central Great Basin and spread across the central U.S. for the middle of the week. High temperatures will approach 90 from Texas to the Ohio Valley. A moist frontal system will bring lowland rain, high elevation mountain snow, and breezy winds to the Pacific Northwest into the Northern Rockies through Wednesday. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

46°F

8°C

Humidity 33%
Wind Speed E 10 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 23 Mar 07:54 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. East wind around 7 mph becoming south southwest after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 63. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight.  Cloudy, with a low around 45. West northwest wind 7 to 9 mph becoming southwest in the evening.

    Low: 45 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. Breezy, with a southwest wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 64 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of rain before 9pm, then a chance of rain and snow between 9pm and midnight, then a chance of snow after midnight.  Mostly cloudy, with a low around 27. Northwest wind 13 to 21 mph, with gusts as high as 31 mph.  Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Thursday

    Thursday: A 40 percent chance of snow showers, mainly before noon.  Partly sunny, with a high near 42. West northwest wind 11 to 20 mph, with gusts as high as 31 mph.  Little or no snow accumulation expected.

    High: 42 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20. North northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 26 mph.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 50. Southwest wind 7 to 9 mph.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. East wind around 7 mph becoming south southwest after midnight.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 63. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
A 20 percent chance of rain before midnight. Cloudy, with a low around 45. West northwest wind 7 to 9 mph becoming southwest in the evening.
Wednesday
Mostly cloudy, with a high near 64. Breezy, with a southwest wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.
Wednesday Night
A chance of rain before 9pm, then a chance of rain and snow between 9pm and midnight, then a chance of snow after midnight. Mostly cloudy, with a low around 27. Northwest wind 13 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Thursday
A 40 percent chance of snow showers, mainly before noon. Partly sunny, with a high near 42. West northwest wind 11 to 20 mph, with gusts as high as 31 mph. Little or no snow accumulation expected.
Thursday Night
Partly cloudy, with a low around 20. North northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 26 mph.
Friday
Sunny, with a high near 50. Southwest wind 7 to 9 mph.
Friday Night
Mostly clear, with a low around 27.
Saturday
Partly sunny, with a high near 58.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 66.
Sunday Night
Partly cloudy, with a low around 38.
Monday
A slight chance of rain. Partly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
4:06 pm MDT Mar 23, 2026
8pm MDT Mar 23, 2026-6pm MDT Mar 30, 2026
 
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Additional Resources

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