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: Partly cloudy, with a low around 41. East southeast wind around 6 mph.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain, mainly after 4pm. Mostly sunny, with a high near 73. South southeast wind 6 to 16 mph becoming west southwest in the morning. Winds could gust as high as 24 mph.

    High: 73 °F

    Mostly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of showers before 11pm. Cloudy, then gradual clearing toward daybreak, with a low around 39. West wind 6 to 13 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 6 to 8 mph becoming north northwest 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 northeast wind 5 to 7 mph becoming south southeast after midnight. Chance of precipitation is 90%.

    Low: 37 °F

    Showers then
    Chance Rain

  • Monday

    Monday: Rain, mainly after noon. High near 55. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%.

    High: 55 °F

    Chance Rain
    then Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 36. West southwest wind 6 to 10 mph. Chance of precipitation is 60%.

    Low: 36 °F

    Rain Likely
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. West southwest wind 7 to 14 mph, with gusts as high as 25 mph.

    High: 58 °F

    Mostly Sunny

  • 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 41. East southeast wind around 6 mph.
Saturday
A 40 percent chance of rain, mainly after 4pm. Mostly sunny, with a high near 73. South southeast wind 6 to 16 mph becoming west southwest in the morning. Winds could gust as high as 24 mph.
Saturday Night
A 50 percent chance of showers before 11pm. Cloudy, then gradual clearing toward daybreak, with a low around 39. West wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday
Showers likely after noon. Partly sunny, with a high near 60. West southwest wind 6 to 8 mph becoming north northwest 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 northeast wind 5 to 7 mph becoming south southeast after midnight. Chance of precipitation is 90%.
Monday
Rain, mainly after noon. High near 55. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 36. West southwest wind 6 to 10 mph. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 58. West southwest wind 7 to 14 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 55.
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 42.
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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:
12:32 am MDT Apr 11, 2026
Forecast Valid:
2am MDT Apr 11, 2026-6pm MDT Apr 17, 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