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.

Mostly Cloudy

75°F

24°C

Humidity 26%
Wind Speed E 8 mph
Barometer 30.49 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 26 Aug 2:55 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 63. East northeast wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 63 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. Northeast wind 6 to 9 mph becoming west southwest in the evening. Winds could gust as high as 16 mph.

    Low: 46 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 66. West wind 9 to 11 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. Southeast wind 5 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67. West wind 9 to 13 mph, with gusts as high as 24 mph.

    High: 67 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Breezy.

    High: 66 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 63. East northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. Northeast wind 6 to 9 mph becoming west southwest in the evening. Winds could gust as high as 16 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 66. West wind 9 to 11 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 49. Southeast wind 5 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67. West wind 9 to 13 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Breezy.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.
Sunday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 60.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 45.
Monday
Showers and thunderstorms likely. Mostly cloudy, with a high near 59.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 60.
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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:
2:25 pm MDT Aug 26, 2026
Forecast Valid:
3pm MDT Aug 26, 2026-6pm MDT Sep 1, 2026
 
Forecast Discussion
 
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Additional Resources

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