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

2 Miles SW Saint Marys Glacier CO

  • Overnight

    Overnight: Partly cloudy, with a low around 48. West northwest wind around 14 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 61. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 61 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: 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 wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    Low: 47 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 59. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 59 °F

    Breezy. Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. West wind 8 to 14 mph, with gusts as high as 24 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Thursday Night

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

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

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

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 48. West northwest wind around 14 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 61. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
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 wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Wednesday
A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 59. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 48. West wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 62.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Breezy.
Sunday
Showers and possibly a thunderstorm. Partly sunny, with a high near 60. 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 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Saint Marys Glacier CO
 39.82°N 105.66°W (Elev. 10981 ft)
Last Update:
12:46 am MDT Aug 18, 2026
Forecast Valid:
3am MDT Aug 18, 2026-6pm MDT Aug 24, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation