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

35°F

2°C

Humidity 91%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 18 May 9:15 pm MDT
Extended Forecast for

3 Miles SSW East Portal CO

  • Tonight

    Tonight: Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 17. West wind around 8 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than one inch possible.

    Low: 17 °F

    Snow Showers
    Likely then
    Chance Snow
    Showers

  • Tuesday

    Tuesday: Snow showers, mainly after 9am. The snow could be heavy at times. Some thunder is also possible. High near 28. West southwest wind 8 to 10 mph becoming east southeast in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    High: 28 °F

    Slight Chance
    Snow Showers
    then Heavy
    Snow

  • Tuesday Night

    Tuesday Night: Snow showers, mainly before 9pm. Some thunder is also possible. Low around 21. South southeast wind 6 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 21 °F

    Snow Showers
    then Chance
    Snow Showers

  • Wednesday

    Wednesday: Snow showers, mainly after noon. Some thunder is also possible. High near 36. West southwest wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    High: 36 °F

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 20. West northwest wind 5 to 10 mph becoming southwest in the evening. Winds could gust as high as 21 mph.

    Low: 20 °F

    Chance Snow
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Snow showers likely after noon. Some thunder is also possible. Partly sunny, with a high near 41. Chance of precipitation is 60%.

    High: 41 °F

    Mostly Sunny
    then Snow
    Showers
    Likely

  • Thursday Night

    Thursday Night: Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °F

    Snow Showers
    Likely

  • Friday

    Friday: A chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 42. Breezy.

    High: 42 °F

    Chance Snow
    Showers and
    Breezy

  • Friday Night

    Friday Night: A slight chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 24.

    Low: 24 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

Detailed Forecast

Tonight
Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 17. West wind around 8 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than one inch possible.
Tuesday
Snow showers, mainly after 9am. The snow could be heavy at times. Some thunder is also possible. High near 28. West southwest wind 8 to 10 mph becoming east southeast in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Tuesday Night
Snow showers, mainly before 9pm. Some thunder is also possible. Low around 21. South southeast wind 6 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Wednesday
Snow showers, mainly after noon. Some thunder is also possible. High near 36. West southwest wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Wednesday Night
A 30 percent chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 20. West northwest wind 5 to 10 mph becoming southwest in the evening. Winds could gust as high as 21 mph.
Thursday
Snow showers likely after noon. Some thunder is also possible. Partly sunny, with a high near 41. Chance of precipitation is 60%.
Thursday Night
Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Friday
A chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 42. Breezy.
Friday Night
A slight chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 24.
Saturday
A chance of snow showers after noon, mixing with rain after 3pm. Some thunder is also possible. Mostly sunny, with a high near 45. Breezy.
Saturday Night
Mostly clear, with a low around 28.
Sunday
A slight chance of showers and thunderstorms. Sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 33.
Memorial Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW East Portal CO
 39.87°N 105.66°W (Elev. 10620 ft)
Last Update:
12:46 pm MDT May 18, 2026
Forecast Valid:
9pm MDT May 18, 2026-6pm MDT May 25, 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