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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

33°F

1°C

Humidity 49%
Wind Speed E 6 mph
Barometer 30.47 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 18 Oct 12:15 am MDT
Extended Forecast for

11 Miles SSE Williams Fork Reservoir CO

  • Overnight

    Overnight: Mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 60. Calm wind becoming northwest around 6 mph.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Southeast wind around 6 mph becoming calm in the evening.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 60. Calm wind becoming west northwest around 5 mph.

    High: 60 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38. South southeast wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Partly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 32. Calm wind.
Sunday
Mostly sunny, with a high near 60. Calm wind becoming northwest around 6 mph.
Sunday Night
Partly cloudy, with a low around 37. Southeast wind around 6 mph becoming calm in the evening.
Monday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 60. Calm wind becoming west northwest around 5 mph.
Monday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 40.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 63.
Thursday Night
Showers likely. Mostly cloudy, with a low around 41.
Friday
Showers likely. Mostly cloudy, with a high near 57.
Friday Night
Rain and snow showers likely. Mostly cloudy, with a low around 37.
Saturday
A chance of rain and snow showers. Partly sunny, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSE Williams Fork Reservoir CO
 39.9°N 106.1°W (Elev. 8573 ft)
Last Update:
12:46 pm MDT Oct 17, 2026
Forecast Valid:
12am MDT Oct 18, 2026-6pm MDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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