August in Fairfield averages a daily high of 27.6°C with nights around 19.5°C. Expect roughly 9.2 wet days totalling 92.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Fairfield is June–September.
Based on IGOR I SIKORSKY MEMORIAL AIRPORT, CT US (11.8km), 1995–2024. 30 years of August data.