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

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. 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 62%
Wind Speed WNW 9 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 17 Mar 06:54 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 34 mph.

    Low: 38 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 62. Breezy, with a west southwest wind 15 to 25 mph, with gusts as high as 37 mph.

    High: 62 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41. West southwest wind 11 to 21 mph, with gusts as high as 32 mph.

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 66. Breezy, with a west southwest wind 13 to 22 mph, with gusts as high as 33 mph.

    High: 66 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44. West southwest wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72. West southwest wind 15 to 21 mph, with gusts as high as 33 mph.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain before noon, then a chance of rain and snow.  Mostly cloudy, with a high near 63. West northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 63 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A slight chance of rain and snow before midnight, then a slight chance of snow.  Partly cloudy, with a low around 26.

    Low: 26 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 34 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 62. Breezy, with a west southwest wind 15 to 25 mph, with gusts as high as 37 mph.
Wednesday Night
Partly cloudy, with a low around 41. West southwest wind 11 to 21 mph, with gusts as high as 32 mph.
Thursday
Mostly cloudy, with a high near 66. Breezy, with a west southwest wind 13 to 22 mph, with gusts as high as 33 mph.
Thursday Night
Partly cloudy, with a low around 44. West southwest wind 15 to 17 mph, with gusts as high as 29 mph.
Friday
Partly sunny, with a high near 72. West southwest wind 15 to 21 mph, with gusts as high as 33 mph.
Friday Night
Mostly cloudy, with a low around 45. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Saturday
A slight chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 63. West northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Saturday Night
A slight chance of rain and snow before midnight, then a slight chance of snow. Partly cloudy, with a low around 26.
Sunday
A slight chance of snow before noon. Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Partly sunny, with a high near 55.
Monday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 32.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
5:47 pm MDT Mar 17, 2026
7pm MDT Mar 17, 2026-6pm MDT Mar 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database