National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Light Snow

34°F

1°C

Humidity 95%
Wind Speed SE 7 mph
Barometer 29.90 in
Dewpoint 33°F (1°C)
Visibility 3.00 mi
Wind Chill28°F (-2°C)
Last update 18 May 1:35 pm MDT
Extended Forecast for

2 Miles NNE Devils Thumb Park CO

Winter Weather Advisory May 18, 01:57pm until May 18, 09:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory May 18, 01:57pm until May 18, 09:00pm

    NOW until 9:00pm Mon

    Winter Weather Advisory

  • This Afternoon

    High: 33 °F

    Heavy Snow

  • Tonight

    Tonight: Snow showers, mainly before midnight. Low around 22. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 22 °F

    Snow Showers
    then Chance
    Snow Showers

  • Tuesday

    Tuesday: Snow showers likely, mainly after 3pm. Some thunder is also possible. Increasing clouds, with a high near 36. Light and variable wind becoming south southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 36 °F

    Partly Sunny
    then Snow
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Snow showers, mainly before 9pm. Low around 25. East southeast wind 3 to 7 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 25 °F

    Snow Showers
    then Chance
    Snow Showers

  • Wednesday

    Wednesday: Snow showers before 3pm, then snow showers, possibly mixed with rain. Some thunder is also possible. High near 42. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 80%.

    High: 42 °F

    Chance Snow
    Showers then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 24.

    Low: 24 °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 47. Chance of precipitation is 60%.

    High: 47 °F

    Mostly Sunny
    then Snow
    Showers
    Likely

  • Thursday Night

    Thursday Night: Rain and snow showers likely before midnight, then a chance of snow showers. Some thunder is also possible. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers

Detailed Forecast

This Afternoon
Snow showers. The snow could be heavy at times. Some thunder is also possible. High near 33. Northeast wind around 7 mph becoming west. Chance of precipitation is 100%. Total daytime snow accumulation of 4 to 8 inches possible.
Tonight
Snow showers, mainly before midnight. Low around 22. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Tuesday
Snow showers likely, mainly after 3pm. Some thunder is also possible. Increasing clouds, with a high near 36. Light and variable wind becoming south southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Snow showers, mainly before 9pm. Low around 25. East southeast wind 3 to 7 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Wednesday
Snow showers before 3pm, then snow showers, possibly mixed with rain. Some thunder is also possible. High near 42. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 80%.
Wednesday Night
A 30 percent chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 24.
Thursday
Snow showers likely after noon. Some thunder is also possible. Partly sunny, with a high near 47. Chance of precipitation is 60%.
Thursday Night
Rain and snow showers likely before midnight, then a chance of snow showers. Some thunder is also possible. Mostly cloudy, with a low around 27.
Friday
A chance of snow showers before 3pm, then a chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 48.
Friday Night
A slight chance of rain and snow showers before 9pm, then a slight chance of snow showers between 9pm and midnight. Some thunder is also possible. Partly cloudy, with a low around 26.
Saturday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 52.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Devils Thumb Park CO
 39.99°N 105.74°W (Elev. 10052 ft)
Last Update:
12:46 pm MDT May 18, 2026
Forecast Valid:
1pm MDT May 18, 2026-6pm MDT May 24, 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