July in Perth Amboy averages a daily high of 30.5°C with nights around 18.7°C. Expect roughly 11 wet days totalling 125.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Perth Amboy is May–June.
Based on NEW BRUNSWICK 3 SE, NJ US (13.8km), 1995–2024. 30 years of July data.