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.

Partly Cloudy

78°F

26°C

Humidity 31%
Wind Speed SW 16 G 22 mph
Barometer 30.43 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 12:35 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 61. Breezy, with a northwest wind 14 to 16 mph, with gusts as high as 29 mph.

    High: 61 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 49. West wind 7 to 14 mph, with gusts as high as 21 mph.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 64. Breezy, with a west wind 8 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 28 mph.

    High: 64 °F

    Sunny and
    Breezy then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. East northeast wind 5 to 14 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 66. West wind 7 to 14 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.

    High: 66 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 50. Breezy.

    Low: 50 °F

    Showers
    Likely then
    Mostly Cloudy
    and Breezy

  • Sunday

    Sunday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 61. Breezy.

    High: 61 °F

    Mostly Sunny
    and Breezy
    then T-storms
    Likely

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 61. Breezy, with a northwest wind 14 to 16 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 49. West wind 7 to 14 mph, with gusts as high as 21 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 64. Breezy, with a west wind 8 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 50. East northeast wind 5 to 14 mph becoming west southwest in the evening. 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 66. West wind 7 to 14 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 64. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 50. Breezy.
Sunday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 61. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. Breezy.
Monday
Showers and possibly a thunderstorm. Partly sunny, with a high near 61. Breezy.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 61.
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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:
6:46 am MDT Aug 19, 2026
Forecast Valid:
12pm MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation