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

43°F

6°C

Humidity 59%
Wind Speed SW 9 MPH
Barometer 29.78 in (1008.47 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 14 Apr 12:54 AM MDT
Extended Forecast for

Lewistown MT

  • Overnight

    Overnight: Partly cloudy, with a low around 34. West wind around 6 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. West wind 8 to 15 mph, with gusts as high as 22 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. West wind 5 to 15 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain before 11am, then a chance of rain after noon. Mostly cloudy, with a high near 59. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 59 °F

    Slight Chance
    Rain then
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain before 3am, then rain and snow. Some thunder is also possible. Low around 28. South wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Showers then
    Rain/Snow

  • Thursday

    Thursday: Snow likely, mainly before noon. Mostly cloudy, with a high near 37. West northwest wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. West wind 8 to 17 mph, with gusts as high as 28 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: A chance of snow after noon. Partly sunny, with a high near 42. West wind 8 to 15 mph, with gusts as high as 26 mph.

    High: 42 °F

    Mostly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: A slight chance of snow before midnight. Partly cloudy, with a low around 23.

    Low: 23 °F

    Slight Chance
    Snow then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 34. West wind around 6 mph.
Tuesday
Mostly sunny, with a high near 61. West wind 8 to 15 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 36. West wind 5 to 15 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.
Wednesday
A slight chance of rain before 11am, then a chance of rain after noon. Mostly cloudy, with a high near 59. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Wednesday Night
Rain before 3am, then rain and snow. Some thunder is also possible. Low around 28. South wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely, mainly before noon. Mostly cloudy, with a high near 37. West northwest wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. West wind 8 to 17 mph, with gusts as high as 28 mph.
Friday
A chance of snow after noon. Partly sunny, with a high near 42. West wind 8 to 15 mph, with gusts as high as 26 mph.
Friday Night
A slight chance of snow before midnight. Partly cloudy, with a low around 23.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 70.
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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 14, 2026
Forecast Valid:
1am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation