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

50°F

10°C

Humidity 48%
Wind Speed Calm
Barometer 30.45 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 9 Aug 5:55 am MDT
Extended Forecast for

4 Miles W Saint Marys Glacier CO

  • Today

    Today: A 30 percent chance of showers and thunderstorms after 3pm. Areas of smoke. Partly sunny, with a high near 59. Breezy, with a northwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 59 °F

    Areas Smoke
    then Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Areas of smoke. Mostly cloudy, with a low around 47. West southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 47 °F

    Slight Chance
    T-storms then
    Areas Smoke

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 59. West northwest wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 59 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. West southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 59. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 59 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely after noon. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.

    High: 56 °F

    Partly Sunny
    then T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, then showers and thunderstorms after noon. Mostly cloudy, with a high near 51.

    High: 51 °F

    Chance
    Showers then
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms after 3pm. Areas of smoke. Partly sunny, with a high near 59. Breezy, with a northwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Areas of smoke. Mostly cloudy, with a low around 47. West southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Monday
A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 59. West northwest wind 9 to 11 mph, with gusts as high as 22 mph.
Monday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. West southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 59. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Wednesday
Showers and thunderstorms likely after noon. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 42.
Thursday
A chance of showers, then showers and thunderstorms after noon. Mostly cloudy, with a high near 51.
Thursday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 41.
Friday
Showers and thunderstorms. Mostly cloudy, with a high near 50.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 39.
Saturday
Showers and thunderstorms. Partly sunny, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Marys Glacier CO
 39.84°N 105.72°W (Elev. 12260 ft)
Last Update:
12:46 am MDT Aug 9, 2026
Forecast Valid:
6am MDT Aug 9, 2026-6pm MDT Aug 15, 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