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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

53°F

12°C

Humidity 82%
Wind Speed S 3 mph
Barometer 30.38 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 18 Sep 7:35 pm MDT
Extended Forecast for

LONG'S PEAK CO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 37. Breezy, with a west southwest wind 8 to 16 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Slight Chance
    T-storms then
    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: Snow showers likely, mainly between 1pm and 5pm. Some thunder is also possible. Partly sunny, with a high near 40. Breezy, with a west southwest wind 10 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 40 °F

    Chance Snow
    Showers and
    Breezy then
    Snow Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of snow showers before 9pm, then a chance of snow showers after 3am. Some thunder is also possible. Partly cloudy, with a low around 31. West southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: A 30 percent chance of snow showers, mainly before noon. Some thunder is also possible. Partly sunny, with a high near 36. Breezy, with a west wind 11 to 18 mph, with gusts as high as 26 mph. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29. West wind 8 to 11 mph, with gusts as high as 17 mph.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers before 9pm, then a chance of rain showers between 9pm and midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 37. Breezy, with a west southwest wind 8 to 16 mph, with gusts as high as 25 mph.
Saturday
Snow showers likely, mainly between 1pm and 5pm. Some thunder is also possible. Partly sunny, with a high near 40. Breezy, with a west southwest wind 10 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday Night
A chance of snow showers before 9pm, then a chance of snow showers after 3am. Some thunder is also possible. Partly cloudy, with a low around 31. West southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday
A 30 percent chance of snow showers, mainly before noon. Some thunder is also possible. Partly sunny, with a high near 36. Breezy, with a west wind 11 to 18 mph, with gusts as high as 26 mph. New snow accumulation of less than a half inch possible.
Sunday Night
Partly cloudy, with a low around 29. West wind 8 to 11 mph, with gusts as high as 17 mph.
Monday
Sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
A chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 43.
Tuesday Night
A chance of rain and snow showers before 9pm, then a chance of rain showers between 9pm and midnight. Mostly cloudy, with a low around 35.
Wednesday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 42.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 36.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 43.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 37.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
LONG'S PEAK CO
 40.27°N 105.62°W (Elev. 12999 ft)
Last Update:
12:46 pm MDT Sep 18, 2026
Forecast Valid:
8pm MDT Sep 18, 2026-6pm MDT Sep 25, 2026
 
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Additional Resources

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Chance of Precipitation