August in West Haven averages a daily high of 27.9°C with nights around 18.8°C. Expect roughly 9.8 wet days totalling 87.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit West Haven is May–June.
Based on NEW HAVEN TWEED AIRPORT, CT US (5km), 1995–2024. 23 years of August data.