Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies; Heavy Rain in Guam

A storm system moving over the Rockies today will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Heavy snow expected from northwestern Wyoming into southern Montana. Ongoing heavy showers and thunderstorms from Invest 96W could result in localized flash flooding, particularly in central or southern Guam early this morning. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

unknown precip

34°F

1°C

Humidity NA
Wind Speed NNW 5 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Wind Chill29°F (-2°C)
Last update NA
Extended Forecast for

Garrison MT

  • Today

    Today: A 30 percent chance of rain, mainly after 4pm.  Patchy fog before noon.  Otherwise, partly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Chance Rain
    and Patchy
    Fog

  • Tonight

    Tonight: A chance of rain before 3am, then a chance of rain and snow.  Patchy frost between midnight and 2am.  Otherwise, mostly cloudy, with a low around 26. Calm wind.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 26 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow before 10am, then a chance of rain.  Partly sunny, with a high near 53. Calm wind becoming west northwest 5 to 8 mph in the afternoon.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 53 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Widespread frost after 3am.  Otherwise, partly cloudy, with a low around 25. West southwest wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 25 °F

    Mostly Clear
    then Frost

  • Friday

    Friday: A slight chance of rain and snow before 9am, then a chance of rain.  Mostly sunny, with a high near 55. West wind 6 to 15 mph, with gusts as high as 29 mph.  Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 55 °F

    Slight Chance
    Rain/Snow
    then Chance
    Rain

  • Friday Night

    Friday Night: A chance of rain before 3am, then a chance of rain and snow.  Snow level 6300 feet lowering to 5100 feet after midnight . Mostly cloudy, with a low around 25. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 25 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Widespread frost, mainly before 10am.  Otherwise, mostly sunny, with a high near 57.

    High: 57 °F

    Frost then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain after midnight.  Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain likely, mainly after noon.  Mostly cloudy, with a high near 59.

    High: 59 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain, mainly after 4pm. Patchy fog before noon. Otherwise, partly sunny, with a high near 52. Calm wind.
Tonight
A chance of rain before 3am, then a chance of rain and snow. Patchy frost between midnight and 2am. Otherwise, mostly cloudy, with a low around 26. Calm wind. Chance of precipitation is 50%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow before 10am, then a chance of rain. Partly sunny, with a high near 53. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Chance of precipitation is 50%. Little or no snow accumulation expected.
Thursday Night
Widespread frost after 3am. Otherwise, partly cloudy, with a low around 25. West southwest wind 7 to 10 mph, with gusts as high as 22 mph.
Friday
A slight chance of rain and snow before 9am, then a chance of rain. Mostly sunny, with a high near 55. West wind 6 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday Night
A chance of rain before 3am, then a chance of rain and snow. Snow level 6300 feet lowering to 5100 feet after midnight . Mostly cloudy, with a low around 25. Chance of precipitation is 30%. Little or no snow accumulation expected.
Saturday
Widespread frost, mainly before 10am. Otherwise, mostly sunny, with a high near 57.
Saturday Night
A slight chance of rain after midnight. Partly cloudy, with a low around 32.
Sunday
Rain likely, mainly after noon. Mostly cloudy, with a high near 59.
Sunday Night
Rain likely before 3am, then rain and snow likely. Snow level 6600 feet lowering to 5000 feet after midnight . Mostly cloudy, with a low around 27.
Monday
Rain and snow likely. Snow level 4800 feet. Mostly cloudy, with a high near 50.
Monday Night
A slight chance of rain and snow. Widespread frost. Snow level 5000 feet lowering to 4400 feet after midnight . Otherwise, partly cloudy, with a low around 21.
Tuesday
Widespread frost. Otherwise, partly sunny, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
3:30 am MDT Oct 15, 2025
9am MDT Oct 15, 2025-6pm MDT Oct 21, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database