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

Critical Fire Weather in the High Plains; Heat Continues in the West

Critical fire weather conditions will persist in the central High Plains through Friday as gusty winds and dry conditions continue. The heat wave across the West and Southwest will continue to intensify through the week, with daily and monthly record highs expected to be broken. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

45°F

7°C

Humidity 52%
Wind Speed SW 4 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 18 Mar 09:20 PM MDT
Extended Forecast for

Lewistown MT

  • Tonight

    Tonight: Partly cloudy, with a low around 43. West southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 67. Breezy, with a west wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 67 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45. West southwest wind 13 to 16 mph, with gusts as high as 28 mph.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72. West southwest wind 11 to 21 mph, with gusts as high as 34 mph.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. Southwest wind 7 to 15 mph, with gusts as high as 26 mph.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 57. West southwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 57 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of rain before midnight, then a slight chance of rain and snow between midnight and 3am, then a slight chance of snow after 3am. Partly cloudy, with a low around 25. Northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 25 °F

    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Sunday

    Sunday: Sunny, with a high near 53. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. West southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 67. Breezy, with a west wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.
Thursday Night
Partly cloudy, with a low around 45. West southwest wind 13 to 16 mph, with gusts as high as 28 mph.
Friday
Partly sunny, with a high near 72. West southwest wind 11 to 21 mph, with gusts as high as 34 mph.
Friday Night
Mostly cloudy, with a low around 43. Southwest wind 7 to 15 mph, with gusts as high as 26 mph.
Saturday
A chance of rain before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 57. West southwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Saturday Night
A chance of rain before midnight, then a slight chance of rain and snow between midnight and 3am, then a slight chance of snow after 3am. Partly cloudy, with a low around 25. Northwest wind 7 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday
Sunny, with a high near 53. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Mostly cloudy, with a high near 55.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 60.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 35.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 62. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
9:22 pm MDT Mar 18, 2026
Forecast Valid:
9pm MDT Mar 18, 2026-6pm MDT Mar 25, 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