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

47°F

8°C

Humidity 78%
Wind Speed Calm
Barometer 30.52 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 24 Aug 3:35 am MDT
Extended Forecast for

2 Miles NW Saint Marys Glacier CO

  • Overnight

    Overnight: Partly cloudy, with a low around 46. West wind around 11 mph, with gusts as high as 18 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 64. West northwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 64 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday 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 45. West southwest wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 61. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 61 °F

    Mostly Sunny
    then Chance
    T-storms

  • 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 43. Northwest wind 6 to 9 mph becoming south southwest in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 40%.

    Low: 43 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 62. Chance of precipitation is 70%.

    High: 62 °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. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.

    Low: 44 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 46. West wind around 11 mph, with gusts as high as 18 mph.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 64. West northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Monday 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 45. West southwest wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 61. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
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 43. Northwest wind 6 to 9 mph becoming south southwest in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 40%.
Wednesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 62. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Friday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64. Breezy.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 64. Breezy.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 62. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Saint Marys Glacier CO
 39.87°N 105.66°W (Elev. 10620 ft)
Last Update:
12:46 am MDT Aug 24, 2026
Forecast Valid:
3am MDT Aug 24, 2026-6pm MDT Aug 30, 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