July in Passaic averages a daily high of 30.5°C with nights around 20.1°C. Expect roughly 10 wet days totalling 117.9mm. Generally workable, with some weather to plan around.
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 July data.