Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

88°F

31°C

Humidity 20%
Wind Speed S 7 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Heat Index85°F (29°C)
Last update 27 Aug 01:45 PM MDT
Extended Forecast for

Garrison MT

  • This Afternoon

    This Afternoon: A chance of rain before 3pm, then a slight chance of thunderstorms after 3pm.  Mostly cloudy, with a high near 87. West southwest wind around 7 mph, with gusts as high as 23 mph.  Chance of precipitation is 40%.

    High: 87 °F

    Chance Rain

  • Tonight

    Tonight: Patchy smoke after 1am. Partly cloudy, with a low around 47. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 47 °F

    Mostly Cloudy
    then Patchy
    Smoke

  • Friday

    Friday: Patchy smoke before 7am. Mostly cloudy, with a high near 81. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 81 °F

    Patchy Smoke
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: A chance of rain before 4am, then a chance of rain after 5am.  Mostly cloudy, with a low around 47. South southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 47 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, then showers and possibly a thunderstorm after noon.  High near 75. Calm wind becoming west southwest around 6 mph in the afternoon.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Chance Rain
    then Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then rain after midnight.  Low around 38. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Showers

  • Sunday

    Sunday: A chance of rain before noon, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 67. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of rain before 3pm, then a slight chance of thunderstorms after 3pm. Mostly cloudy, with a high near 87. West southwest wind around 7 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Tonight
Patchy smoke after 1am. Partly cloudy, with a low around 47. West southwest wind around 6 mph becoming calm in the evening.
Friday
Patchy smoke before 7am. Mostly cloudy, with a high near 81. Calm wind becoming south 5 to 7 mph in the afternoon.
Friday Night
A chance of rain before 4am, then a chance of rain after 5am. Mostly cloudy, with a low around 47. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Saturday
A chance of rain, then showers and possibly a thunderstorm after noon. High near 75. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before midnight, then rain after midnight. Low around 38. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 40.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 39.
Wednesday
A chance of rain. Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.54°N 112.81°W (Elev. 4400 ft)
2:01 pm MDT Aug 27, 2026
2pm MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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Additional Resources

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