August in Trenton averages a daily high of 29.1°C with nights around 18.6°C. Expect roughly 10.3 wet days totalling 110.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Trenton is May–June.
Based on TRENTON MERCER AIRPORT, NJ US (9.1km), 1995–2024. 27 years of August data.