January in Fairfield averages a daily high of 3.6°C with nights around -4.1°C. Expect roughly 11.3 wet days totalling 83.4mm. A hard month to visit for comfort alone.
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 January data.