July in Piscataway 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 Piscataway is May–June.
Based on NEW BRUNSWICK 3 SE, NJ US (3.5km), 1995–2024. 30 years of July data.