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

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Overcast

27°F

-3°C

Humidity 72%
Wind Speed W 10 G 20 mph
Barometer 30.08 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 6 Dec 9:15 pm MST
Extended Forecast for

4 Miles W Saint Marys Glacier CO

Winter Storm Warning December 6, 09:31pm until December 6, 11:00pm
Click here for hazard details and duration
...
  •  
    Winter Storm Warning December 6, 09:31pm until December 6, 11:00pm

    NOW until 11:00pm Sat

    Winter Storm Warning

  • Tonight

    Low: 3 °F

    Snow Showers
    and Blowing
    Snow

  • Sunday

    Sunday: A 30 percent chance of snow before 11am. Areas of blowing snow. Partly sunny and cold, with a steady temperature around 5. Wind chill values as low as -21. Windy, with a west northwest wind 23 to 29 mph, with gusts as high as 44 mph. New snow accumulation of less than a half inch possible.

    High: 5 °F

    Chance Snow
    and Areas
    Blowing Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 6. Wind chill values as low as -15. Windy, with a west wind 23 to 28 mph, with gusts as high as 37 mph.

    Low: 6 °F

    Slight Chance
    Snow and
    Windy

  • Monday

    Monday: A 40 percent chance of snow, mainly before 11am. Partly sunny, with a high near 13. Wind chill values as low as -14. Windy, with a west wind 23 to 25 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.

    High: 13 °F

    Chance Snow
    and Windy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 11. Windy, with a west wind 28 to 34 mph, with gusts as high as 50 mph.

    Low: 11 °F

    Mostly Cloudy
    and Windy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after 11am. Partly sunny, with a high near 24. Very windy.

    High: 24 °F

    Chance Snow
    and Very
    Windy

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 19. Windy.

    Low: 19 °F

    Chance Snow
    and Windy

  • Wednesday

    Wednesday: Snow likely. Mostly cloudy, with a high near 25. Very windy.

    High: 25 °F

    Snow Likely
    and Very
    Windy

Detailed Forecast

Tonight
Snow showers. Widespread blowing snow, mainly after 2am. Low around 3. Wind chill values as low as -17. Windy, with a west northwest wind 25 to 32 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
Sunday
A 30 percent chance of snow before 11am. Areas of blowing snow. Partly sunny and cold, with a steady temperature around 5. Wind chill values as low as -21. Windy, with a west northwest wind 23 to 29 mph, with gusts as high as 44 mph. New snow accumulation of less than a half inch possible.
Sunday Night
A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 6. Wind chill values as low as -15. Windy, with a west wind 23 to 28 mph, with gusts as high as 37 mph.
Monday
A 40 percent chance of snow, mainly before 11am. Partly sunny, with a high near 13. Wind chill values as low as -14. Windy, with a west wind 23 to 25 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a low around 11. Windy, with a west wind 28 to 34 mph, with gusts as high as 50 mph.
Tuesday
A 30 percent chance of snow, mainly after 11am. Partly sunny, with a high near 24. Very windy.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 19. Windy.
Wednesday
Snow likely. Mostly cloudy, with a high near 25. Very windy.
Wednesday Night
Snow likely. The snow could be heavy at times. Mostly cloudy, with a low around 17. Very windy.
Thursday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 21. Windy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 16. Windy.
Friday
A chance of snow. Mostly sunny, with a high near 20. Breezy.
Friday Night
Partly cloudy, with a low around 13. Breezy.
Saturday
Mostly sunny, with a high near 22. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Marys Glacier CO
 39.84°N 105.72°W (Elev. 12260 ft)
Last Update:
1:36 pm MST Dec 6, 2025
Forecast Valid:
9pm MST Dec 6, 2025-6pm MST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation