Weather · Denver, United States
Denver Weather in September
September in Denver averages 27°C by day and 18°C at night, with about 79mm of rain. That makes it one of the best months to visit.
Avg high
27°C
81°F
Avg low
18°C
64°F
Rainfall
79mm
#9 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Denver builds it around the season for you.