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

66°F

19°C

Humidity 40%
Wind Speed N 3 mph
Barometer 30.52 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 20 Aug 10:55 pm MDT
Extended Forecast for

3 Miles NNW Arapahoe Peak CO

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 50. South wind around 7 mph becoming west after midnight.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 66. West wind 7 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.

    High: 66 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 47. Northeast wind 6 to 9 mph becoming southwest after midnight. Winds could gust as high as 15 mph.

    Low: 47 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 62. Light and variable wind becoming south southeast 8 to 13 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 70%.

    High: 62 °F

    Mostly 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. West wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely then
    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 60. Breezy.

    High: 60 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a steady temperature around 50. South wind around 7 mph becoming west after midnight.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 66. West wind 7 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 47. Northeast wind 6 to 9 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Saturday
Showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 62. Light and variable wind becoming south southeast 8 to 13 mph in the morning. Winds could gust as high as 18 mph. 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. West wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 60. Breezy.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Monday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 60.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43.
Tuesday
A slight chance of showers, then showers and thunderstorms likely after noon. Partly sunny, with a high near 59.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 60.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 43.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 59. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Arapahoe Peak CO
 40.06°N 105.66°W (Elev. 12014 ft)
Last Update:
12:46 pm MDT Aug 20, 2026
Forecast Valid:
11pm MDT Aug 20, 2026-6pm MDT Aug 27, 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