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

Lewistown, Lewistown Municipal Airport (KLWT)

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

Overcast

42°F

6°C

Humidity 62%
Wind Speed ENE 5 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 30 Mar 12:54 AM MDT
Extended Forecast for

Lewistown Municipal MT

  • Overnight

    Overnight: A 40 percent chance of rain. Mostly cloudy, with a low around 33. East northeast wind around 6 mph.

    Low: 33 °F

    Chance Rain

  • Monday

    Monday: Rain and snow likely, becoming all snow after 1pm. Cloudy, with a high near 41. Breezy, with a southeast wind 6 to 11 mph becoming northwest 18 to 23 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Rain/Snow
    Likely and
    Breezy

  • Monday Night

    Monday Night: A 20 percent chance of snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 13. Northwest wind 16 to 21 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 29 mph.

    Low: 13 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40. South wind 5 to 11 mph becoming northeast in the morning. Winds could gust as high as 20 mph.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. Southeast wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. South southeast wind 5 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34. Southeast wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: Rain. Cloudy, with a high near 51. South southeast wind 8 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 51 °F

    Rain

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 9pm. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Rain/Snow
    then Snow
    Likely

Detailed Forecast

Overnight
A 40 percent chance of rain. Mostly cloudy, with a low around 33. East northeast wind around 6 mph.
Monday
Rain and snow likely, becoming all snow after 1pm. Cloudy, with a high near 41. Breezy, with a southeast wind 6 to 11 mph becoming northwest 18 to 23 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night
A 20 percent chance of snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 13. Northwest wind 16 to 21 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 29 mph.
Tuesday
Mostly sunny, with a high near 40. South wind 5 to 11 mph becoming northeast in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 22. Southeast wind 8 to 13 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 54. South southeast wind 5 to 8 mph.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34. Southeast wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday
Rain. Cloudy, with a high near 51. South southeast wind 8 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.
Thursday Night
Rain and snow, becoming all snow after 9pm. Mostly cloudy, with a low around 23.
Friday
Snow likely, mainly before noon. Mostly cloudy, with a high near 34. Breezy.
Friday Night
A chance of snow. Mostly cloudy, with a low around 19.
Saturday
A slight chance of snow. Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
9:22 pm MDT Mar 29, 2026
Forecast Valid:
1am MDT Mar 30, 2026-6pm MDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation