May in Passaic averages a daily high of 22.6°C with nights around 11.5°C. Expect roughly 11.9 wet days totalling 101.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Passaic is May–June.
Based on TETERBORO AIRPORT, NJ US (6.1km), 1995–2024. 30 years of May data.