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.

Mostly Cloudy

72°F

22°C

Humidity 29%
Wind Speed SE 3 mph
Barometer 30.39 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 18 Aug 7:55 pm MDT
Extended Forecast for

3 Miles WNW Saint Marys Glacier CO

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. West wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 58. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 58 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44. West wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59. Breezy, with a west northwest wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 59 °F

    Breezy. Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44. North northwest wind 9 to 11 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59.

    High: 59 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and possibly a thunderstorm after noon. Partly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny
    then T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 44. Breezy.

    Low: 44 °F

    Breezy.
    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. West wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 58. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 44. West wind 8 to 14 mph, with gusts as high as 22 mph.
Thursday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59. Breezy, with a west northwest wind 10 to 15 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around 44. North northwest wind 9 to 11 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.
Friday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Showers and possibly a thunderstorm after noon. Partly sunny, with a high near 58.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 44. Breezy.
Sunday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 56. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 55.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 42.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
Last Update:
12:46 pm MDT Aug 18, 2026
Forecast Valid:
8pm MDT Aug 18, 2026-6pm MDT Aug 25, 2026
 
Forecast Discussion
 
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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