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

56°F

13°C

Humidity 53%
Wind Speed N 3 mph
Barometer 30.59 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 25 Aug 8:55 am MDT
Extended Forecast for

3 Miles WSW Saint Marys Glacier CO

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 63. Northwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 63 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 44. Northwest wind around 8 mph becoming west southwest after midnight.

    Low: 44 °F

    Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Sunny during the morning, then mostly cloudy during the afternoon, with a high near 63. West wind around 8 mph becoming east northeast in the afternoon. Chance of precipitation is 60%.

    High: 63 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 43. East wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 43 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62. West wind 7 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 62 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Breezy. Chance of precipitation is 20%.

    Low: 44 °F

    Slight Chance
    T-storms then
    Partly Cloudy
    and Breezy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. Breezy.

    High: 63 °F

    Mostly Sunny
    and Breezy
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46. Breezy.

    Low: 46 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 63. Breezy.

    High: 63 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 63. Northwest wind 8 to 11 mph, with gusts as high as 18 mph.
Tonight
A 30 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 44. Northwest wind around 8 mph becoming west southwest after midnight.
Wednesday
A slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Sunny during the morning, then mostly cloudy during the afternoon, with a high near 63. West wind around 8 mph becoming east northeast in the afternoon. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 43. East wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62. West wind 7 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Breezy. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. Breezy.
Friday Night
Mostly cloudy, with a low around 46. Breezy.
Saturday
A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 63. Breezy.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46. Breezy.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 59. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Saint Marys Glacier CO
 39.82°N 105.69°W (Elev. 10909 ft)
Last Update:
12:46 am MDT Aug 25, 2026
Forecast Valid:
9am MDT Aug 25, 2026-6pm MDT Aug 31, 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