July in Flagstaff averages a daily high of 27.9°C with nights around 11.1°C. Expect roughly 12.4 wet days totalling 71.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Flagstaff is May–June.
Based on FLAGSTAFF AIRPORT, AZ US (6.1km), 1995–2024. 30 years of July data.