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 76%
Wind Speed E 3 mph
Barometer 30.78 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 15 Oct 11:15 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: Mostly clear, with a low around 19. Northwest wind 7 to 9 mph, with gusts as high as 15 mph.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 42. North northwest wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 42 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 30. Light west southwest wind becoming west 9 to 14 mph in the evening. Winds could gust as high as 25 mph.

    Low: 30 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 53. Breezy, with a west northwest wind 6 to 15 mph, with gusts as high as 26 mph.

    High: 53 °F

    Sunny and
    Breezy then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. Breezy, with a west wind 7 to 17 mph, with gusts as high as 30 mph.

    Low: 33 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Slight Chance
    Snow Showers

  • Monday

    Monday: A slight chance of snow showers before noon, then a slight chance of rain and snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Mostly sunny, with a high near 48.

    High: 48 °F

    Slight Chance
    Snow Showers
    then Slight
    Chance
    Rain/Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 19. Northwest wind 7 to 9 mph, with gusts as high as 15 mph.
Friday
Sunny, with a high near 42. North northwest wind 5 to 8 mph becoming light and variable in the afternoon.
Friday Night
Clear, with a low around 30. Light west southwest wind becoming west 9 to 14 mph in the evening. Winds could gust as high as 25 mph.
Saturday
Sunny, with a high near 53. Breezy, with a west northwest wind 6 to 15 mph, with gusts as high as 26 mph.
Saturday Night
Mostly clear, with a low around 33. Breezy, with a west wind 7 to 17 mph, with gusts as high as 30 mph.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 32.
Monday
A slight chance of snow showers before noon, then a slight chance of rain and snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Mostly sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
A slight chance of showers after noon. Mostly sunny, with a high near 50.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 51.
Wednesday Night
A slight chance of rain and snow showers. Partly cloudy, with a low around 37.
Thursday
A chance of rain and snow showers. Partly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
12:46 pm MDT Oct 15, 2026
Forecast Valid:
11pm MDT Oct 15, 2026-6pm MDT Oct 22, 2026
 
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Additional Resources

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Chance of Precipitation