August in Plainfield averages a daily high of 29.9°C with nights around 17.7°C. Expect roughly 10.4 wet days totalling 122.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Plainfield is May–June.
Based on CANOE BROOK, NJ US (13km), 1995–2024. 27 years of August data.