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

50°F

10°C

Humidity 90%
Wind Speed Calm
Barometer 30.49 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 15 Aug 4:35 am MDT
Extended Forecast for

6 Miles WNW Arapahoe Peak CO

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 45. Southwest wind around 5 mph.

    Low: 45 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 62. West southwest wind 3 to 8 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    High: 62 °F

    Slight Chance
    Showers then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 47. West wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 40%.

    Low: 47 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 66. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday 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 46. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 67. Breezy.

    High: 67 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 45. Southwest wind around 5 mph.
Saturday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 62. West southwest wind 3 to 8 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 47. West wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 40%.
Sunday
A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 66. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 20 mph.
Sunday 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 46. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Partly sunny, with a high near 67. Breezy.
Tuesday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Wednesday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 67.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 49.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WNW Arapahoe Peak CO
 40.06°N 105.74°W (Elev. 10095 ft)
Last Update:
12:46 am MDT Aug 15, 2026
Forecast Valid:
4am MDT Aug 15, 2026-6pm MDT Aug 21, 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