June in Denver averages a daily high of 30.1°C with nights around 12.9°C. Expect roughly 7.7 wet days totalling 43.2mm. Generally workable, with some weather to plan around.
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 June data.