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.

Mostly Cloudy

N/A

Humidity 72%
Wind Speed W 8 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 27 Jun 08:20 PM MDT
Extended Forecast for

Lewistown Municipal MT

  • Overnight

    Overnight: A slight chance of showers and thunderstorms between 3am and 4am. Patchy smoke. Partly cloudy, with a low around 45. Light south wind. Chance of precipitation is 20%.

    Low: 45 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after noon. Patchy smoke before 1pm. Increasing clouds, with a high near 74. South wind around 5 mph becoming calm in the afternoon.

    High: 74 °F

    Patchy Smoke
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 47. South southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly sunny, with a high near 74. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 74 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 76. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 76 °F

    Mostly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48. West northwest wind around 5 mph becoming light and variable.

    Low: 48 °F

    Partly Cloudy

  • Independence Day

    Independence Day: Sunny, with a high near 80. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms between 3am and 4am. Patchy smoke. Partly cloudy, with a low around 45. Light south wind. Chance of precipitation is 20%.
Wednesday
A 50 percent chance of showers and thunderstorms after noon. Patchy smoke before 1pm. Increasing clouds, with a high near 74. South wind around 5 mph becoming calm in the afternoon.
Wednesday Night
Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 47. South southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly sunny, with a high near 74. Calm wind becoming north northwest around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 48. Calm wind becoming south southeast around 5 mph after midnight.
Friday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 76. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 48. West northwest wind around 5 mph becoming light and variable.
Independence Day
Sunny, with a high near 80. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 85.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
12:31 am MDT Jul 1, 2026
Forecast Valid:
2am MDT Jul 1, 2026-6pm MDT Jul 7, 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