October in Denver averages a daily high of 20.1°C with nights around 2.9°C. Expect roughly 5.6 wet days totalling 26.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Denver is September–October.
Based on DENVER WATER DEPARTMENT, CO US (2.3km), 1995–2024. 27 years of October data.