July in Green Bay averages a daily high of 26.9°C with nights around 15.2°C. Expect roughly 9.8 wet days totalling 95mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Green Bay is May–September.
Based on GREEN BAY BOTANICAL, WI US (6.4km), 1995–2024. 23 years of July data.