March in Norwalk averages a daily high of 10.3°C with nights around -1.3°C. Expect roughly 9.1 wet days totalling 116.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Norwalk is August–October.
Based on STAMFORD 5 N, CT US (11.7km), 1995–2024. 19 years of March data.