July in Arvada averages a daily high of 31.7°C with nights around 14.1°C. Expect roughly 8.6 wet days totalling 47.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Arvada is May–June.
Based on WHEAT RIDGE 2, CO US (3.9km), 1995–2024. 27 years of July data.