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

Granby-Grand County Airport (KGNB)

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

Fair

29°F

-2°C

Humidity 95%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 18 Nov 9:55 pm MST
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: Mostly clear, with a low around 24. Breezy, with a west wind 13 to 18 mph, with gusts as high as 31 mph.

    Low: 24 °F

    Partly Cloudy
    then Mostly
    Clear and
    Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34. Breezy, with a west wind 6 to 16 mph, with gusts as high as 28 mph.

    High: 34 °F

    Mostly Sunny
    and Breezy
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. West wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of snow showers, mainly after 11am. Mostly cloudy, with a high near 29. West wind 9 to 14 mph becoming east in the afternoon. Winds could gust as high as 25 mph. New snow accumulation of around an inch possible.

    High: 29 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Snow showers. Low around 21. North wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%.

    Low: 21 °F

    Snow Showers

  • Friday

    Friday: Snow showers. High near 25. Chance of precipitation is 80%.

    High: 25 °F

    Snow Showers

  • Friday Night

    Friday Night: A 30 percent chance of snow showers, mainly before 11pm. Mostly cloudy, with a low around 21. Breezy.

    Low: 21 °F

    Chance Snow
    Showers and
    Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 30. Breezy.

    High: 30 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 20. Breezy.

    Low: 20 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 24. Breezy, with a west wind 13 to 18 mph, with gusts as high as 31 mph.
Wednesday
Mostly sunny, with a high near 34. Breezy, with a west wind 6 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly cloudy, with a low around 24. West wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday
A 50 percent chance of snow showers, mainly after 11am. Mostly cloudy, with a high near 29. West wind 9 to 14 mph becoming east in the afternoon. Winds could gust as high as 25 mph. New snow accumulation of around an inch possible.
Thursday Night
Snow showers. Low around 21. North wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%.
Friday
Snow showers. High near 25. Chance of precipitation is 80%.
Friday Night
A 30 percent chance of snow showers, mainly before 11pm. Mostly cloudy, with a low around 21. Breezy.
Saturday
Mostly sunny, with a high near 30. Breezy.
Saturday Night
Mostly clear, with a low around 20. Breezy.
Sunday
Sunny, with a high near 31. Breezy.
Sunday Night
Mostly clear, with a low around 21. Blustery.
Monday
Sunny, with a high near 30. Blustery.
Monday Night
Mostly clear, with a low around 20. Breezy.
Tuesday
A chance of snow showers. Mostly sunny, with a high near 26. Blustery.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.85°N 105.63°W (Elev. 11368 ft)
Last Update:
2:06 pm MST Nov 18, 2025
Forecast Valid:
10pm MST Nov 18, 2025-6pm MST Nov 25, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation