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.

Clear

N/A

Humidity 80%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 05 Apr 02:15 AM MDT
Extended Forecast for

Lewistown MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 28. Southeast wind 3 to 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 51. West southwest wind around 6 mph becoming north in the afternoon.

    High: 51 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. North wind 5 to 7 mph becoming east southeast in the evening.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 65. Southeast wind 6 to 8 mph.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. Southeast wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after noon. Partly sunny, with a high near 73. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 73 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 41. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after noon. Partly sunny, with a high near 55. West wind 6 to 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 55 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain. Cloudy, with a low around 33.

    Low: 33 °F

    Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 28. Southeast wind 3 to 6 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 51. West southwest wind around 6 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 28. North wind 5 to 7 mph becoming east southeast in the evening.
Friday
Mostly sunny, with a high near 65. Southeast wind 6 to 8 mph.
Friday Night
Mostly cloudy, with a low around 41. Southeast wind 6 to 10 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of showers after noon. Partly sunny, with a high near 73. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Saturday Night
A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 41. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Showers likely, mainly after noon. Partly sunny, with a high near 55. West wind 6 to 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Rain. Cloudy, with a low around 33.
Monday
Rain. Cloudy, with a high near 47.
Monday Night
A chance of rain. Mostly cloudy, with a low around 29.
Tuesday
A slight chance of rain. Partly sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
12:31 am MDT Apr 9, 2026
Forecast Valid:
3am MDT Apr 9, 2026-6pm MDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation