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 >

Hazardous Weather Conditions

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Partly Cloudy

63°F

17°C

Humidity 25%
Wind Speed WSW 14 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 20 Mar 09:05 AM MDT
Extended Forecast for

2 Miles N Lewistown MT

High Wind Warning until March 21, 12:00pm
Click here for hazard details and duration
High Wind Warning
  •  
    High Wind Warning until March 21, 12:00pm

    NOW until 12:00pm Sat

    High Wind Warning

  • Today

    High: 76 °F

    Partly Sunny
    and Windy

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. West wind 15 to 20 mph becoming south 7 to 12 mph in the evening. Winds could gust as high as 28 mph.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain, mainly after 11am. High near 59. Northeast wind 7 to 12 mph becoming northwest 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Slight Chance
    Rain then
    Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 27. West wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 29 mph.

    Low: 27 °F

    Chance Rain
    then Partly
    Cloudy

  • Sunday

    Sunday: Sunny, with a high near 52. West northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 56. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 56 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. North northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 76. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 41 mph.
Tonight
Mostly cloudy, with a low around 45. West wind 15 to 20 mph becoming south 7 to 12 mph in the evening. Winds could gust as high as 28 mph.
Saturday
Rain, mainly after 11am. High near 59. Northeast wind 7 to 12 mph becoming northwest 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 27. West wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 29 mph.
Sunday
Sunny, with a high near 52. West northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Sunday Night
Mostly cloudy, with a low around 29. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Monday
Mostly cloudy, with a high near 56. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 31. North northwest wind 5 to 8 mph becoming light and variable after midnight.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
A slight chance of rain before midnight. Mostly cloudy, with a low around 41.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 63. Breezy.
Wednesday Night
A slight chance of rain and snow. Partly cloudy, with a low around 27.
Thursday
A slight chance of snow. Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Lewistown MT
 47.09°N 109.43°W (Elev. 3901 ft)
Last Update:
4:01 am MDT Mar 20, 2026
Forecast Valid:
9am MDT Mar 20, 2026-6pm MDT Mar 26, 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