In September, Trenton typically sees daytime highs of 25.6°C and overnight lows around 13.2°C. Compared to the annual average high of 17.6°C, September runs +8.0°C.
September in Trenton averages a daytime high of 25.6°C and an overnight low of 13.2°C.
September runs +8.0°C compared to Trenton's annual average high of 17.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 25.6°C and cooler evenings around 13.2°C.