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.

Overcast

50°F

10°C

Humidity 67%
Wind Speed Calm
Barometer 30.60 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 25 Aug 7:55 am MDT
Extended Forecast for

4 Miles S LONG'S PEAK CO

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 71. West wind 6 to 8 mph becoming north northwest in the afternoon.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. North wind 5 to 7 mph becoming west in the evening.

    Low: 46 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 69. West wind 5 to 7 mph becoming light and variable. Chance of precipitation is 60%.

    High: 69 °F

    Sunny then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 45. Light and variable wind becoming west 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 71. West wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 60%.

    High: 71 °F

    Sunny then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. Breezy.

    High: 73 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 71. West wind 6 to 8 mph becoming north northwest in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 46. North wind 5 to 7 mph becoming west in the evening.
Wednesday
A slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 69. West wind 5 to 7 mph becoming light and variable. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 45. Light and variable wind becoming west 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 71. West wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 47.
Friday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74.
Friday Night
Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 73. Breezy.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. Breezy.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 69. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S LONG'S PEAK CO
 40.2°N 105.61°W (Elev. 10141 ft)
Last Update:
12:46 am MDT Aug 25, 2026
Forecast Valid:
8am MDT Aug 25, 2026-6pm MDT Aug 31, 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