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.

Mostly Cloudy

80°F

27°C

Humidity 21%
Wind Speed W 15 mph
Barometer 30.25 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 13 Sep 2:35 pm MDT
Extended Forecast for

Grand Lake CO

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76. Southwest wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 43. South wind 5 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, with thunderstorms also possible after noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. Breezy, with a west southwest wind 8 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely then
    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 38. West southwest wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 50%.

    Low: 38 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 69. Light and variable wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers 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. Mostly cloudy, with a low around 36. Chance of precipitation is 50%.

    Low: 36 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 70.

    High: 70 °F

    Partly Sunny
    then Showers

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76. Southwest wind 11 to 13 mph, with gusts as high as 21 mph.
Tonight
A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 43. South wind 5 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Monday
Showers likely, with thunderstorms also possible after noon. Cloudy, then gradually becoming mostly sunny, with a high near 69. Breezy, with a west southwest wind 8 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 38. West southwest wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Tuesday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 69. Light and variable wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 50%.
Wednesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 71.
Wednesday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 38.
Thursday
Showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 70.
Thursday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 37.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 69.
Friday Night
A chance of showers. Partly cloudy, with a low around 34.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 67.
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Forecast Area
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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 Sep 13, 2026
Forecast Valid:
2pm MDT Sep 13, 2026-6pm MDT Sep 19, 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