April in Trenton averages a daily high of 17.3°C with nights around 5.8°C. Expect roughly 11.6 wet days totalling 97.6mm. 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 April data.