August in Waterbury averages a daily high of 28.4°C with nights around 16.6°C. Expect roughly 11.5 wet days totalling 94.1mm. 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. 23 years of August data.