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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Saint Marys Glacier CO

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 66. Breezy, with a west northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 66 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West northwest wind 6 to 9 mph becoming southwest in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 40%.

    Low: 47 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 63. Breezy, with a west northwest wind 9 to 15 mph, with gusts as high as 28 mph.

    High: 63 °F

    Sunny then
    Chance
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. West wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67. West wind 7 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66.

    High: 66 °F

    Sunny then
    Showers
    Likely

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 66. Breezy, with a west northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West northwest wind 6 to 9 mph becoming southwest in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 63. Breezy, with a west northwest wind 9 to 15 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly clear, with a low around 48. West wind 7 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 67. West wind 7 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50. Breezy.
Sunday
Showers and possibly a thunderstorm. Partly sunny, with a high near 64. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
Monday
Showers and possibly a thunderstorm. Partly sunny, with a high near 63.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
4:21 am MDT Aug 18, 2026
Forecast Valid:
6am MDT Aug 18, 2026-6pm MDT Aug 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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