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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Lewistown Divide MT-200 MP 90.3 (MTLEW)

Lat: 47.07579°NLon: 109.26247°WElev: 4723.0ft.

NA

65°F

18°C

Humidity 44%
Wind Speed NW 1 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 28 Aug 10:45 PM MDT
Extended Forecast for

7 Miles WNW Grass Range MT

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 59. West southwest wind 7 to 9 mph.

    Low: 59 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 77. West wind 7 to 9 mph becoming south in the afternoon. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 52. South wind 7 to 11 mph becoming west after midnight. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. High near 66. West wind 13 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    High: 66 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. West southwest wind 13 to 20 mph, with gusts as high as 28 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Northwest wind 5 to 7 mph becoming light and variable.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. South southeast wind 3 to 8 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 59. West southwest wind 7 to 9 mph.
Saturday
Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 77. West wind 7 to 9 mph becoming south in the afternoon. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 52. South wind 7 to 11 mph becoming west after midnight. Chance of precipitation is 60%.
Sunday
Showers, with thunderstorms also possible after noon. High near 66. West wind 13 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Sunday Night
Mostly clear, with a low around 46. West southwest wind 13 to 20 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 75. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 51. Northwest wind 5 to 7 mph becoming light and variable.
Tuesday
Sunny, with a high near 86. South southeast wind 3 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 53.
Thursday
A slight chance of showers. Mostly sunny, with a high near 80.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 50.
Friday
A slight chance of showers. Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WNW Grass Range MT
 47.06°N 108.96°W (Elev. 3698 ft)
Last Update:
10:26 pm MDT Aug 28, 2026
Forecast Valid:
11pm MDT Aug 28, 2026-6pm MDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation