National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong Storms and Heavy Rainfall Threats; Dangerous Heat for Southern Plains into the Southwest

Thunderstorms, some severe, will impact areas of the Plains into the Midwest today. Rainfall can be locally heavy as well from these storms with isolated instances of flash flooding. Monsoonal flow will enhance rainfall across the Four Corners into the central Rockies today. Meanwhile, summer heat continues for the southern Plains, Southwest into southern California. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

N/A

Humidity 59%
Wind Speed N 0 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 30 Jul 04:50 AM MDT
Extended Forecast for

2 Miles NW Lewistown MT

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 50. East southeast wind 5 to 9 mph.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 88. East southeast wind around 5 mph becoming calm.

    High: 88 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55. Southeast wind 5 to 8 mph.

    Low: 55 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 93. South southeast wind around 5 mph becoming calm.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 55. South wind 5 to 8 mph.

    Low: 55 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 86. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 53. Southwest wind 3 to 7 mph.

    Low: 53 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming east northeast around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 50. East southeast wind 5 to 9 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 88. East southeast wind around 5 mph becoming calm.
Wednesday Night
Mostly cloudy, with a low around 55. Southeast wind 5 to 8 mph.
Thursday
Mostly sunny, with a high near 93. South southeast wind around 5 mph becoming calm.
Thursday Night
A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 55. South wind 5 to 8 mph.
Friday
Mostly sunny, with a high near 86. Calm wind becoming west northwest around 5 mph in the afternoon.
Friday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 53. Southwest wind 3 to 7 mph.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 48.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 45.
Monday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Lewistown MT
 47.09°N 109.46°W (Elev. 3898 ft)
Last Update:
9:52 am MDT Aug 25, 2026
Forecast Valid:
10am MDT Aug 25, 2026-6pm MDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation