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 Municipal MT

  • Overnight

    Overnight: Partly cloudy, with a low around 40. East southeast wind around 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain, mainly after 4pm. Mostly sunny, with a high near 72. South southeast wind 7 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 72 °F

    Mostly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of showers before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. West wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Showers likely after noon. Partly sunny, with a high near 60. West southwest wind around 9 mph becoming north in the afternoon. Chance of precipitation is 60%.

    High: 60 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 9pm, then rain, mainly between 9pm and midnight. Low around 37. East wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 90%.

    Low: 37 °F

    Showers then
    Chance Rain

  • Monday

    Monday: Rain, mainly after noon. High near 54. Southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 54 °F

    Chance Rain
    then Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 35. West southwest wind 8 to 10 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Rain Likely
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A slight chance of rain after noon. Partly sunny, with a high near 57. West southwest wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 57 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 40. East southeast wind around 8 mph.
Saturday
A 40 percent chance of rain, mainly after 4pm. Mostly sunny, with a high near 72. South southeast wind 7 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
A 50 percent chance of showers before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. West wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday
Showers likely after noon. Partly sunny, with a high near 60. West southwest wind around 9 mph becoming north in the afternoon. Chance of precipitation is 60%.
Sunday Night
Showers and possibly a thunderstorm before 9pm, then rain, mainly between 9pm and midnight. Low around 37. East wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 90%.
Monday
Rain, mainly after noon. High near 54. Southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 35. West southwest wind 8 to 10 mph. Chance of precipitation is 60%.
Tuesday
A slight chance of rain after noon. Partly sunny, with a high near 57. West southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
A chance of rain after noon. Mostly cloudy, with a high near 54.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 28.
Thursday
Snow likely. Mostly cloudy, with a high near 40.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 18.
Friday
A chance of snow. Mostly sunny, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
12:32 am MDT Apr 11, 2026
Forecast Valid:
12am MDT Apr 11, 2026-6pm MDT Apr 17, 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