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

52°F

11°C

Humidity 69%
Wind Speed Calm
Barometer 30.57 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 27 Aug 8:15 am MDT
Extended Forecast for

4 Miles W Saint Marys Glacier CO

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 56. West wind 8 to 11 mph becoming north northeast in the afternoon. Winds could gust as high as 18 mph.

    High: 56 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 45. Northeast wind 7 to 11 mph becoming southwest in the evening. Winds could gust as high as 18 mph.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57. Breezy, with a west wind 11 to 17 mph, with gusts as high as 30 mph.

    High: 57 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46. Breezy, with a west southwest wind 13 to 15 mph, with gusts as high as 26 mph.

    Low: 46 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 56. Breezy, with a west wind 15 to 21 mph, with gusts as high as 36 mph.

    High: 56 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 40%.

    Low: 44 °F

    Breezy.
    Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 52. Breezy.

    High: 52 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny
    then Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 56. West wind 8 to 11 mph becoming north northeast in the afternoon. Winds could gust as high as 18 mph.
Tonight
Partly cloudy, with a low around 45. Northeast wind 7 to 11 mph becoming southwest in the evening. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 57. Breezy, with a west wind 11 to 17 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 46. Breezy, with a west southwest wind 13 to 15 mph, with gusts as high as 26 mph.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 56. Breezy, with a west wind 15 to 21 mph, with gusts as high as 36 mph.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 40%.
Sunday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 52. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 40.
Monday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 50.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 39.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Marys Glacier CO
 39.84°N 105.72°W (Elev. 12260 ft)
Last Update:
7:53 am MDT Aug 27, 2026
Forecast Valid:
8am MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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