In September, Wilmington typically sees daytime highs of 27.7°C and overnight lows around 19.4°C. Compared to the annual average high of 21.9°C, September runs +5.8°C.
September in Wilmington averages a daytime high of 27.7°C and an overnight low of 19.4°C.
September runs +5.8°C compared to Wilmington's annual average high of 21.9°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 27.7°C and cooler evenings around 19.4°C.