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

Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Mostly Cloudy

39°F

4°C

Humidity 81%
Wind Speed Calm
Barometer 30.41 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 22 Sep 8:35 am MDT
Extended Forecast for

Arapahoe Peak CO

  • Today

    Today: A chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 47. West wind 8 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 47 °F

    Sunny then
    Chance
    Rain/Snow

  • Tonight

    Tonight: A 40 percent chance of showers before 9pm. Mostly cloudy, with a low around 36. South southwest wind 8 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.

    Low: 36 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow showers before 1pm, then a slight chance of rain and snow showers after 3pm. Some thunder is also possible. Mostly cloudy, with a high near 44. Breezy, with a west wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 44 °F

    Chance
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain likely, possibly mixed with snow showers, mainly after midnight. Mostly cloudy, with a low around 34. Southwest wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: Rain and snow showers likely before 3pm, then a chance of rain showers. Some thunder is also possible. Mostly cloudy, with a high near 37. East northeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 37 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain showers, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.

    Low: 34 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Friday

    Friday: A chance of rain and snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 47. Breezy. Chance of precipitation is 40%.

    High: 47 °F

    Partly Sunny
    then Chance
    Rain/Snow and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 34. Breezy.

    Low: 34 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 47. Breezy.

    High: 47 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Today
A chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 47. West wind 8 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tonight
A 40 percent chance of showers before 9pm. Mostly cloudy, with a low around 36. South southwest wind 8 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.
Wednesday
A chance of rain and snow showers before 1pm, then a slight chance of rain and snow showers after 3pm. Some thunder is also possible. Mostly cloudy, with a high near 44. Breezy, with a west wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday Night
Rain likely, possibly mixed with snow showers, mainly after midnight. Mostly cloudy, with a low around 34. Southwest wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Rain and snow showers likely before 3pm, then a chance of rain showers. Some thunder is also possible. Mostly cloudy, with a high near 37. East northeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday Night
A chance of rain showers, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.
Friday
A chance of rain and snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 47. Breezy. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 34. Breezy.
Saturday
Mostly sunny, with a high near 47. Breezy.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
A slight chance of snow showers. Some thunder is also possible. Mostly sunny, with a high near 48.
Sunday Night
A slight chance of rain and snow showers. Partly cloudy, with a low around 36.
Monday
Snow showers likely. Some thunder is also possible. Mostly cloudy, with a high near 43. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe Peak CO
 40.02°N 105.65°W (Elev. 12680 ft)
Last Update:
2:49 am MDT Sep 22, 2026
Forecast Valid:
8am MDT Sep 22, 2026-6pm MDT Sep 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation