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

22°C

71°F

Humidity 28%
Wind Speed SW 20 G 28 km/h
Barometer 30.32 in
Dewpoint 2°C (36°F)
Visibility 16 km
Last update 15 Sep 3:55 pm MDT
Extended Forecast for

3 Miles W Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 9. Southwest wind 14 to 16 km/h, with gusts as high as 29 km/h.

    High: 9 °C

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 3. West southwest wind 13 to 23 km/h, with gusts as high as 39 km/h. Chance of precipitation is 40%.

    Low: 3 °C

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 10. Breezy, with a west wind 19 to 24 km/h becoming south southeast 11 to 16 km/h in the afternoon. Winds could gust as high as 42 km/h. Chance of precipitation is 70%.

    High: 10 °C

    Slight Chance
    Showers and
    Breezy then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 3. East southeast wind around 14 km/h becoming south southwest after midnight. Winds could gust as high as 27 km/h. Chance of precipitation is 70%.

    Low: 3 °C

    Showers
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after noon. High near 7. South southwest wind 11 to 16 km/h becoming north in the afternoon. Winds could gust as high as 29 km/h. Chance of precipitation is 90%.

    High: 7 °C

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 3. Chance of precipitation is 40%.

    Low: 3 °C

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Showers and possibly a thunderstorm after noon. High near 9. Chance of precipitation is 80%.

    High: 9 °C

    Partly Sunny
    then Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 2.

    Low: 2 °C

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 8.

    High: 8 °C

    Mostly Sunny
    then Showers
    Likely

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 9. Southwest wind 14 to 16 km/h, with gusts as high as 29 km/h.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 3. West southwest wind 13 to 23 km/h, with gusts as high as 39 km/h. Chance of precipitation is 40%.
Wednesday
A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 10. Breezy, with a west wind 19 to 24 km/h becoming south southeast 11 to 16 km/h in the afternoon. Winds could gust as high as 42 km/h. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 3. East southeast wind around 14 km/h becoming south southwest after midnight. Winds could gust as high as 27 km/h. Chance of precipitation is 70%.
Thursday
A chance of showers, then showers and possibly a thunderstorm after noon. High near 7. South southwest wind 11 to 16 km/h becoming north in the afternoon. Winds could gust as high as 29 km/h. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 3. Chance of precipitation is 40%.
Friday
Showers and possibly a thunderstorm after noon. High near 9. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 2.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 8.
Saturday Night
A slight chance of rain showers, mixing with snow after 9pm, then gradually ending. Some thunder is also possible. Partly cloudy, with a low around -1.
Sunday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 7.
Sunday Night
A slight chance of rain and snow showers. Partly cloudy, with a low around -1.
Monday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 7.
Monday Night
A slight chance of rain and snow showers. Partly cloudy, with a low around -1.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 8.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 m)
Last Update:
12:46 pm MDT Sep 15, 2026
Forecast Valid:
4pm MDT Sep 15, 2026-6pm MDT Sep 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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