July in Waterbury averages a daily high of 29.2°C with nights around 17.4°C. Expect roughly 11.4 wet days totalling 98.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Waterbury is August–October.
Based on MERIDEN MARKHAM MUNICIPAL AIRPORT, CT US (19.4km), 1995–2024. 25 years of July data.