June in Waterbury averages a daily high of 26.2°C with nights around 14°C. Expect roughly 12.2 wet days totalling 109.8mm. Comfortable conditions for being outdoors all day.
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 June data.