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

55°F

13°C

Humidity 92%
Wind Speed N 3 mph
Barometer 30.53 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 23 Aug 12:15 am MDT
Extended Forecast for

Grand Lake CO

  • Overnight

    Overnight: A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 47. Light south southwest wind.

    Low: 47 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 79. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 22 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday 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 46. West southwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 79. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 79 °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. Mostly cloudy, with a low around 43. West southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

    Low: 43 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.

    High: 79 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 47. Light south southwest wind.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 79. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Sunday 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 46. West southwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Monday
A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 79. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.
Monday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 43. West southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Tuesday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.
Wednesday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.
Thursday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 43.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 80. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Lake CO
 40.25°N 105.82°W (Elev. 8386 ft)
Last Update:
12:46 pm MDT Aug 22, 2026
Forecast Valid:
12am MDT Aug 23, 2026-6pm MDT Aug 29, 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