July in Parsippany averages a daily high of 29.9°C with nights around 18.1°C. Expect roughly 10.9 wet days totalling 127.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Parsippany is May–June.
Based on BOONTON 1 SE, NJ US (4.5km), 1995–2024. 24 years of July data.