March in Trenton averages a daily high of 11°C with nights around 0.7°C. Expect roughly 11.1 wet days totalling 98.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Trenton is May–June.
Based on TRENTON MERCER AIRPORT, NJ US (9.1km), 1995–2024. 26 years of March data.