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.

Overcast

56°F

13°C

Humidity 53%
Wind Speed Calm
Barometer 30.34 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 Sep 6:35 pm MDT
Extended Forecast for

LONG'S PEAK CO

  • Tonight

    Tonight: A chance of rain and snow showers before 9pm, then a slight chance of snow showers after 3am. Some thunder is also possible. Partly cloudy, with a low around 32. West southwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 32 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Sunday

    Sunday: A 40 percent chance of snow showers, mainly before noon. Some thunder is also possible. Partly sunny, with a high near 42. Breezy, with a west wind 13 to 20 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance Snow
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30. West wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 46. West wind 7 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph.

    High: 46 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32. Southeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 49. Chance of precipitation is 20%.

    High: 49 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 48. Breezy.

    High: 48 °F

    Partly Sunny
    and Breezy
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain and snow showers before 9pm, then a slight chance of snow showers after 3am. Some thunder is also possible. Partly cloudy, with a low around 32. West southwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday
A 40 percent chance of snow showers, mainly before noon. Some thunder is also possible. Partly sunny, with a high near 42. Breezy, with a west wind 13 to 20 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly clear, with a low around 30. West wind 6 to 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 46. West wind 7 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph.
Monday Night
Partly cloudy, with a low around 32. Southeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 15 mph.
Tuesday
A slight chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 49. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.
Wednesday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 48. Breezy.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 48.
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 48.
Friday Night
A chance of showers. Mostly cloudy, with a low around 38. Breezy.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 49. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
LONG'S PEAK CO
 40.24°N 105.62°W (Elev. 12064 ft)
Last Update:
12:46 pm MDT Sep 19, 2026
Forecast Valid:
7pm MDT Sep 19, 2026-6pm MDT Sep 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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