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Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

82°F

28°C

Humidity 15%
Wind Speed SW 3 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Heat Index80°F (27°C)
Last update 01 Sep 01:45 PM MDT
Extended Forecast for

Garrison MT

  • This Afternoon

    This Afternoon: A slight chance of rain before 4pm, then a slight chance of rain after 5pm. Mostly sunny, with a high near 86. Calm wind becoming east southeast around 5 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain and thunderstorms likely before 11pm, then a chance of rain between 11pm and midnight. Mostly cloudy, with a low around 44. West wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Slight Chance
    Rain then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 39. West northwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 18 mph.

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 74. Light south wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 30 percent chance of rain. Patchy fog after 1am. Patchy frost after 5am. Otherwise, mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain
    and Patchy
    Fog

  • Friday

    Friday: A chance of rain before noon, then a chance of showers and thunderstorms after noon. Patchy fog before 10am. Otherwise, partly sunny, with a high near 74. Chance of precipitation is 40%.

    High: 74 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: A chance of rain, mainly before midnight. Partly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of rain before 4pm, then a slight chance of rain after 5pm. Mostly sunny, with a high near 86. Calm wind becoming east southeast around 5 mph. Chance of precipitation is 20%.
Tonight
Rain and thunderstorms likely before 11pm, then a chance of rain between 11pm and midnight. Mostly cloudy, with a low around 44. West wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Wednesday
A slight chance of rain, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly cloudy, with a low around 39. West northwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 18 mph.
Thursday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 74. Light south wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A 30 percent chance of rain. Patchy fog after 1am. Patchy frost after 5am. Otherwise, mostly cloudy, with a low around 38.
Friday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Patchy fog before 10am. Otherwise, partly sunny, with a high near 74. Chance of precipitation is 40%.
Friday Night
A chance of rain, mainly before midnight. Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 39.
Sunday
A chance of rain. Partly sunny, with a high near 77.
Sunday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 42.
Labor Day
Rain likely. Mostly cloudy, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
Last Update:
12:22 pm MDT Sep 1, 2026
Forecast Valid:
2pm MDT Sep 1, 2026-6pm MDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation