October in Fairfield averages a daily high of 18.1°C with nights around 9.2°C. Expect roughly 9.8 wet days totalling 99.6mm. Generally workable, with some weather to plan around.
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 October data.