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

83°F

28°C

Humidity 19%
Wind Speed SW 12 G 18 mph
Barometer 30.47 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 22 Aug 1:55 pm MDT
Extended Forecast for

3 Miles SW East Portal CO

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 63. South southeast wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 46. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 46 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 60. Breezy, with a west northwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    High: 60 °F

    Breezy.
    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 46. West wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 60. West northwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 60 °F

    Mostly Sunny
    then Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Chance of precipitation is 30%.

    Low: 44 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 63. South southeast wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 70%.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 46. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Sunday
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 60. Breezy, with a west northwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 46. West wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Monday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 60. West northwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Chance of precipitation is 30%.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 58. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59.
Wednesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 60.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 44.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 60. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW East Portal CO
 39.89°N 105.7°W (Elev. 11722 ft)
Last Update:
12:46 pm MDT Aug 22, 2026
Forecast Valid:
2pm MDT Aug 22, 2026-6pm MDT Aug 28, 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