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Denver's Monthly Weather Summary for September 2026

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

64°F

18°C

Humidity	26%
Wind Speed	SE 3 mph
Barometer	30.41 in
Dewpoint	28°F (-2°C)
Visibility	10.00 mi
Last update	5 Oct 7:15 pm MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

5 Miles SW LONG'S PEAK CO

Tonight
Low: 39 °F
Mostly Clear
Tuesday
High: 53 °F
Mostly Sunny
then Slight
Chance
Showers
Tuesday Night
Low: 37 °F
Slight Chance
Showers then
Mostly Cloudy
Wednesday
High: 52 °F
Mostly Sunny
then Chance
Showers
Wednesday Night
Low: 35 °F
Chance
Showers then
Mostly Clear
Thursday
High: 50 °F
Sunny
Thursday Night
Low: 35 °F
Partly Cloudy
Friday
High: 50 °F
Sunny
Friday Night
Low: 35 °F
Mostly Clear
and Breezy

Detailed Forecast

Tonight

Mostly clear, with a low around 39. West northwest wind 7 to 9 mph, with gusts as high as 15 mph.

Tuesday

A 20 percent chance of showers after noon. Partly sunny, with a high near 53. West northwest wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

Tuesday Night

A slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 37. East wind around 7 mph becoming west after midnight. Chance of precipitation is 20%.

Wednesday

A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 52. West northwest wind 6 to 9 mph becoming south southeast in the afternoon. Chance of precipitation is 30%.

Wednesday Night

A 30 percent chance of showers before midnight. Partly cloudy, with a low around 35. West wind 6 to 9 mph, with gusts as high as 15 mph.

Thursday

Sunny, with a high near 50.

Thursday Night

Partly cloudy, with a low around 35.

Friday

Sunny, with a high near 50.

Friday Night

Mostly clear, with a low around 35. Breezy.

Saturday

Sunny, with a high near 48. Windy.