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

46°F

8°C

Humidity 49%
Wind Speed SW 14 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 14 Apr 08:35 AM MDT
Extended Forecast for

Lewistown MT

  • Today

    Today: Mostly sunny, with a high near 61. West wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 61 °F

    Mostly Sunny

  • Tonight

    Tonight: 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 40 percent 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. Little or no snow accumulation expected.

    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. North northwest wind 5 to 13 mph becoming west southwest after midnight. Winds could gust as high as 23 mph.

    Low: 23 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 61. West wind 9 to 15 mph, with gusts as high as 22 mph.
Tonight
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 40 percent 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. Little or no snow accumulation expected.
Friday Night
A slight chance of snow before midnight. Partly cloudy, with a low around 23. North northwest wind 5 to 13 mph becoming west southwest after midnight. Winds could gust as high as 23 mph.
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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
3:12 am MDT Apr 14, 2026
Forecast Valid:
8am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation