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

82°F

28°C

Humidity 20%
Wind Speed W 10 mph
Barometer 30.52 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 22 Aug 12:15 pm MDT
Extended Forecast for

3 Miles WSW East Portal CO

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a temperature falling to around 53 by 5pm. East wind around 8 mph becoming south southwest. Chance of precipitation is 60%.

    High: 63 °F⇓

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Mostly cloudy, with a low around 46. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%.

    Low: 46 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 60. Breezy, with a west northwest wind 14 to 18 mph, with gusts as high as 30 mph.

    High: 60 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 59. West northwest wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%.

    High: 59 °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 43. Chance of precipitation is 50%.

    Low: 43 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 58. Chance of precipitation is 70%.

    High: 58 °F

    Mostly Sunny
    then T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Partly 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 58.

    High: 58 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a temperature falling to around 53 by 5pm. East wind around 8 mph becoming south southwest. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Mostly cloudy, with a low around 46. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 60. Breezy, with a west northwest wind 14 to 18 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 45. West wind 10 to 14 mph, with gusts as high as 24 mph.
Monday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 59. West northwest wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%.
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 43. Chance of precipitation is 50%.
Tuesday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 58. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 42.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 58.
Wednesday Night
A slight 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 59.
Thursday Night
Partly cloudy, with a low around 43.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW East Portal CO
 39.89°N 105.7°W (Elev. 11722 ft)
Last Update:
2:15 am MDT Aug 22, 2026
Forecast Valid:
12pm 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