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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

39°F

4°C

Humidity 55%
Wind Speed SW 16 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 22 Mar 10:00 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Today

    Today: Sunny, with a high near 53. West northwest wind 13 to 20 mph, with gusts as high as 32 mph.

    High: 53 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 29. Northwest wind 5 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 59. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 59 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. East northeast wind 6 to 8 mph becoming south southwest after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow after noon. Cloudy, with a high near 59. Southwest wind 6 to 8 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    High: 59 °F

    Cloudy then
    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 41. North wind around 10 mph becoming southwest in the evening. Winds could gust as high as 18 mph.

    Low: 41 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 62. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 62 °F

    Mostly Cloudy
    then Slight
    Chance Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: A chance of rain before 3am, then a chance of snow. Mostly cloudy, with a low around 27. Northwest wind 13 to 20 mph, with gusts as high as 31 mph.

    Low: 27 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

  • Thursday

    Thursday: A slight chance of snow before noon. Mostly sunny, with a high near 44.

    High: 44 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 53. West northwest wind 13 to 20 mph, with gusts as high as 32 mph.
Tonight
Partly cloudy, with a low around 29. Northwest wind 5 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.
Monday
Partly sunny, with a high near 59. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 35. East northeast wind 6 to 8 mph becoming south southwest after midnight.
Tuesday
A slight chance of rain and snow after noon. Cloudy, with a high near 59. Southwest wind 6 to 8 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Tuesday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 41. North wind around 10 mph becoming southwest in the evening. Winds could gust as high as 18 mph.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 62. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.
Wednesday Night
A chance of rain before 3am, then a chance of snow. Mostly cloudy, with a low around 27. Northwest wind 13 to 20 mph, with gusts as high as 31 mph.
Thursday
A slight chance of snow before noon. Mostly sunny, with a high near 44.
Thursday Night
Mostly clear, with a low around 21.
Friday
Sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 25.
Saturday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
6:51 am MDT Mar 22, 2026
Forecast Valid:
10am MDT Mar 22, 2026-6pm MDT Mar 28, 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