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

57°F

14°C

Humidity 86%
Wind Speed Calm
Barometer 30.55 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 23 Aug 9:15 am MDT
Extended Forecast for

2 Miles W Saint Marys Glacier CO

  • Today

    Today: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 57. Breezy, with a west northwest wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 57 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 44. Breezy, with a west wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 44 °F

    Slight Chance
    T-storms and
    Breezy then
    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 57. West wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 57 °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 41. West wind 8 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    Low: 41 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 55. West northwest wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 70%.

    High: 55 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

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

    Low: 40 °F

    Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 56. Chance of precipitation is 60%.

    High: 56 °F

    Mostly Sunny
    then T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 56. Breezy.

    High: 56 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 57. Breezy, with a west northwest wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Tonight
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 44. Breezy, with a west wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 57. West wind 8 to 11 mph, with gusts as high as 18 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 41. West wind 8 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 55. West northwest wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 40. Chance of precipitation is 40%.
Wednesday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 56. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41.
Thursday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 56. Breezy.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 42.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 57. Breezy.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 42.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 57. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
Last Update:
2:19 am MDT Aug 23, 2026
Forecast Valid:
9am MDT Aug 23, 2026-6pm MDT Aug 29, 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