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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

37°F

3°C

Humidity	66%
Wind Speed	E 3 mph
Barometer	30.49 in
Dewpoint	27°F (-3°C)
Visibility	10.00 mi
Last update	7 Oct 7:15 am MDT

More Information:

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

Extended Forecast for

3 Miles NE Arapahoe Peak CO

Today
High: 60 °F
Sunny then
Chance
Showers
Tonight
Low: 39 °F
Slight Chance
Showers then
Partly Cloudy
Thursday
High: 59 °F
Sunny then
Slight Chance
Showers
Thursday Night
Low: 38 °F
Mostly Clear
Friday
High: 58 °F
Sunny
Friday Night
Low: 39 °F
Mostly Clear
and Breezy
Saturday
High: 55 °F
Mostly Sunny
and Breezy
Saturday Night
Low: 38 °F
Partly Cloudy
then Partly
Cloudy and
Breezy
Sunday
High: 52 °F
Partly Sunny
then Chance
Showers

Detailed Forecast

Today

A 30 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 60. Northwest wind 5 to 7 mph becoming southeast in the afternoon.

Tonight

A 20 percent chance of showers before 9pm. Partly cloudy, with a low around 39. South wind 5 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph.

Thursday

A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 59. West wind 5 to 13 mph, with gusts as high as 21 mph.

Thursday Night

Mostly clear, with a low around 38. West wind 5 to 14 mph, with gusts as high as 18 mph.

Friday

Sunny, with a high near 58. West wind 8 to 14 mph, with gusts as high as 23 mph.

Friday Night

Mostly clear, with a low around 39. Breezy.

Saturday

Mostly sunny, with a high near 55. Breezy.

Saturday Night

Partly cloudy, with a low around 38. Breezy.