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

Wet and Cool in the East this Memorial Day Weekend; Well Above Normal Temperatures in the Northern Plains

A wet Memorial Day weekend is in store for the East, with widespread rainfall of 1 to more than 2 inches expected from the Gulf Coast to southern New England. Well above normal temperatures are forecast to build across the northern Plains. Another round of heavy to excessive rainfall is expected to impact the western Gulf Coast this weekend with Flood Watches in effect. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

48°F

9°C

Humidity 59%
Wind Speed NNE 1 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 22 May 09:45 AM MDT
Extended Forecast for

Garrison MT

  • Today

    Today: Sunny, with a high near 66. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers between 9pm and 10pm. Partly cloudy, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Areas of frost before 7am. Otherwise, mostly sunny, with a high near 73. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 73 °F

    Areas Frost
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. West northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.

    High: 81 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of rain. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

  • Tuesday

    Tuesday: A chance of rain, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66.

    High: 66 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 66. Calm wind becoming northwest around 6 mph in the afternoon.
Tonight
A 20 percent chance of showers between 9pm and 10pm. Partly cloudy, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Areas of frost before 7am. Otherwise, mostly sunny, with a high near 73. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Mostly clear, with a low around 39. West northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 42.
Memorial Day
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
Monday Night
A chance of rain. Mostly cloudy, with a low around 41.
Tuesday
A chance of rain, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66.
Tuesday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 37.
Wednesday
A chance of rain and thunderstorms. Partly sunny, with a high near 62.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 37.
Thursday
A chance of rain and thunderstorms. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
Last Update:
8:41 am MDT May 22, 2026
Forecast Valid:
10am MDT May 22, 2026-6pm MDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation