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.

Partly Cloudy

48°F

9°C

Humidity 74%
Wind Speed Calm
Barometer 30.53 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 20 Aug 7:15 am MDT
Extended Forecast for

Grand Lake CO

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. North wind 5 to 8 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 82 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 46. North northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 46 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 82. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 70%.

    High: 82 °F

    Sunny then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely then
    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 78.

    High: 78 °F

    Sunny then
    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Tonight
Mostly clear, with a low around 46. North wind 5 to 8 mph becoming calm in the evening.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 46. North northeast wind 5 to 7 mph becoming calm after midnight.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 82. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Sunday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.
Monday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 78.
Monday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 42.
Tuesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 77.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 40.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Lake CO
 40.25°N 105.85°W (Elev. 8599 ft)
Last Update:
4:33 am MDT Aug 20, 2026
Forecast Valid:
7am MDT Aug 20, 2026-6pm MDT Aug 26, 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