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.

Partly Cloudy

49°F

9°C

Humidity 58%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 3 Oct 11:35 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. Breezy, with a west southwest wind 13 to 16 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Slight Chance
    Showers and
    Breezy

  • Saturday

    Saturday: A chance of rain showers before 1pm, then rain and snow showers likely between 1pm and 5pm, then snow showers likely after 5pm. Some thunder is also possible. Partly sunny, with a high near 50. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 50 °F

    Breezy.
    Slight Chance
    Showers then
    Rain/Snow
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of snow showers before 9pm. Mostly clear, with a low around 29. Windy, with a west wind 18 to 25 mph, with gusts as high as 41 mph.

    Low: 29 °F

    Windy. Slight
    Chance Snow
    Showers then
    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow showers after noon. Increasing clouds, with a high near 42. Breezy, with a west wind 10 to 17 mph becoming east southeast in the afternoon. Winds could gust as high as 26 mph.

    High: 42 °F

    Sunny and
    Breezy then
    Slight Chance
    Snow Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of snow showers. Cloudy, with a low around 30. East southeast wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Chance Snow
    Showers

  • Monday

    Monday: A 30 percent chance of snow showers after noon. Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny
    then Chance
    Snow Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow showers after noon. Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny
    then Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers before midnight, then a slight chance of snow showers. Partly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. Breezy, with a west southwest wind 13 to 16 mph, with gusts as high as 25 mph.
Saturday
A chance of rain showers before 1pm, then rain and snow showers likely between 1pm and 5pm, then snow showers likely after 5pm. Some thunder is also possible. Partly sunny, with a high near 50. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday Night
A 20 percent chance of snow showers before 9pm. Mostly clear, with a low around 29. Windy, with a west wind 18 to 25 mph, with gusts as high as 41 mph.
Sunday
A 20 percent chance of snow showers after noon. Increasing clouds, with a high near 42. Breezy, with a west wind 10 to 17 mph becoming east southeast in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
A 50 percent chance of snow showers. Cloudy, with a low around 30. East southeast wind 8 to 11 mph, with gusts as high as 20 mph.
Monday
A 30 percent chance of snow showers after noon. Partly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
A chance of snow showers after noon. Mostly sunny, with a high near 45.
Tuesday Night
A slight chance of rain and snow showers before midnight, then a slight chance of snow showers. Partly cloudy, with a low around 33.
Wednesday
A slight chance of snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 48. Breezy.
Wednesday Night
Mostly clear, with a low around 34. Breezy.
Thursday
Sunny, with a high near 49. Breezy.
Thursday Night
Partly cloudy, with a low around 35.
Friday
A slight chance of rain and snow showers. Mostly sunny, with a high near 47. Breezy.
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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:
2:21 pm MDT Oct 3, 2025
Forecast Valid:
11pm MDT Oct 3, 2025-6pm MDT Oct 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation