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

Areas of Extreme Heat and Excessive Rainfall Potential

Dangerous and extreme heat will remain across portions of the central U.S. this week, persisting across the mid to lower Mississippi Valley, Gulf Coast, southern Plains and portions of Texas. A heat wave over the Southwest U.S. will peak this weekend. Heavy to excessive rainfall may produce flash flooding from the Delmarva Peninsula north into the Hudson Valley today and tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

Lat: 46.52361°NLon: 112.80843°WElev: 4327.0ft.

NA

90°F

32°C

Humidity 14%
Wind Speed WNW 4 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Heat Index86°F (30°C)
Last update 28 Jul 03:31 PM MDT
Extended Forecast for

12 Miles W Marysville MT

  • Tonight

    Tonight: Patchy smoke. Mostly clear, with a low around 54. West wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke. Sunny, with a high near 71. West wind 5 to 10 mph becoming east southeast in the morning. Winds could gust as high as 18 mph.

    High: 71 °F

    Patchy Smoke

  • Wednesday Night

    Wednesday Night: Patchy smoke. Mostly clear, with a low around 55. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Patchy Smoke

  • Thursday

    Thursday: Patchy smoke before 7am. Sunny, with a high near 72. West southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 72 °F

    Patchy Smoke
    then Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 54. West wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

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

    Low: 51 °F

    Mostly Clear
    and Windy

Detailed Forecast

Tonight
Patchy smoke. Mostly clear, with a low around 54. West wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday
Patchy smoke. Sunny, with a high near 71. West wind 5 to 10 mph becoming east southeast in the morning. Winds could gust as high as 18 mph.
Wednesday Night
Patchy smoke. Mostly clear, with a low around 55. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
Patchy smoke before 7am. Sunny, with a high near 72. West southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Thursday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 54. West wind 9 to 11 mph, with gusts as high as 18 mph.
Friday
Sunny, with a high near 73.
Friday Night
Clear, with a low around 57.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 51. Windy.
Sunday
Sunny, with a high near 61.
Sunday Night
Clear, with a low around 42. Breezy.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
Last Update:
2:01 pm MDT Jul 28, 2026
Forecast Valid:
3pm MDT Jul 28, 2026-6pm MDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation