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.

Overcast

69°F

21°C

Humidity 41%
Wind Speed E 9 mph
Barometer 30.46 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 26 Aug 7:35 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. East southeast wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 18 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 62. West northwest wind 10 to 13 mph becoming east in the afternoon. Winds could gust as high as 22 mph.

    High: 62 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. Breezy, with a southeast wind 6 to 15 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 49 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Breezy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. Breezy, with a west wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 63 °F

    Sunny and
    Breezy then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 51. Breezy, with a west southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    Low: 51 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 62. Breezy.

    High: 62 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. East southeast wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 62. West northwest wind 10 to 13 mph becoming east in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 49. Breezy, with a southeast wind 6 to 15 mph becoming west after midnight. Winds could gust as high as 23 mph.
Friday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. Breezy, with a west wind 10 to 16 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 51. Breezy, with a west southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 62. Breezy.
Saturday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.
Sunday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 56.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 45.
Monday
Showers and thunderstorms likely after noon. Mostly cloudy, with a high near 55.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 56.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 44.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.66°W (Elev. 10981 ft)
Last Update:
2:25 pm MDT Aug 26, 2026
Forecast Valid:
8pm MDT Aug 26, 2026-6pm MDT Sep 2, 2026
 
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Additional Resources

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