July in Norwalk averages a daily high of 29.6°C with nights around 17.3°C. Expect roughly 8.8 wet days totalling 92.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Norwalk is August–October.
Based on STAMFORD 5 N, CT US (11.7km), 1995–2024. 20 years of July data.