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

  • Today

    Today: A chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 59. West southwest wind around 7 mph becoming northeast in the afternoon. Chance of precipitation is 70%.

    High: 59 °F

    Mostly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 3am, then a chance of rain after 5am. Low around 36. East wind around 6 mph becoming southwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 36 °F

    Showers then
    Chance Rain

  • Monday

    Monday: Rain, mainly after noon. High near 53. West southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Chance Rain
    then Rain

  • Monday Night

    Monday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. West southwest wind 7 to 9 mph.

    Low: 35 °F

    Chance Rain
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. West wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 5 to 13 mph, with gusts as high as 22 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after noon. Mostly cloudy, with a high near 56. West southwest wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 56 °F

    Slight Chance
    Rain then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain before 9pm, then rain and snow between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 27. West northwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 38.

    High: 38 °F

    Snow Likely

Detailed Forecast

Today
A chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 59. West southwest wind around 7 mph becoming northeast in the afternoon. Chance of precipitation is 70%.
Tonight
Rain and possibly a thunderstorm before 3am, then a chance of rain after 5am. Low around 36. East wind around 6 mph becoming southwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Rain, mainly after noon. High near 53. West southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. West southwest wind 7 to 9 mph.
Tuesday
Mostly sunny, with a high near 59. West wind 9 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 5 to 13 mph, with gusts as high as 22 mph.
Wednesday
Rain likely, mainly after noon. Mostly cloudy, with a high near 56. West southwest wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Wednesday Night
Rain before 9pm, then rain and snow between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 27. West northwest wind around 11 mph, with gusts as high as 20 mph.
Thursday
Snow likely. Mostly cloudy, with a high near 38.
Thursday Night
A chance of snow before midnight. Mostly cloudy, with a low around 18.
Friday
A chance of snow. Partly sunny, with a high near 43.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 23.
Saturday
A slight chance of rain and snow. Mostly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
3:26 am MDT Apr 12, 2026
Forecast Valid:
5am MDT Apr 12, 2026-6pm MDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation