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.

Fair

39°F

4°C

Humidity 71%
Wind Speed SE 3 mph
Barometer 30.37 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 4 Sep 5:15 am MDT
Extended Forecast for

Saint Marys Glacier CO

  • Today

    Today: Increasing clouds, with a high near 64. Breezy, with a west northwest wind 14 to 18 mph, with gusts as high as 29 mph.

    High: 64 °F

    Increasing
    Clouds and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms. Widespread smoke between 9pm and 3am. Mostly cloudy, with a low around 38. West northwest wind 6 to 11 mph becoming east southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    Low: 38 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 51. West southwest wind 5 to 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 51 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. East northeast wind 5 to 7 mph becoming west southwest after midnight. Winds could gust as high as 15 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 56. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 56 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 40. Chance of precipitation is 20%.

    Low: 40 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 54. Chance of precipitation is 60%.

    High: 54 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 57. Breezy.

    High: 57 °F

    Mostly Sunny
    and Breezy
    then Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 64. Breezy, with a west northwest wind 14 to 18 mph, with gusts as high as 29 mph.
Tonight
A chance of showers and thunderstorms. Widespread smoke between 9pm and 3am. Mostly cloudy, with a low around 38. West northwest wind 6 to 11 mph becoming east southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 51. West southwest wind 5 to 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. East northeast wind 5 to 7 mph becoming west southwest after midnight. Winds could gust as high as 15 mph.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 56. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 40. Chance of precipitation is 20%.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 54. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.
Monday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 57. Breezy.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 58.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
4:01 am MDT Sep 4, 2025
Forecast Valid:
5am MDT Sep 4, 2025-6pm MDT Sep 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation