In September, Chapel Hill typically sees daytime highs of 27.8°C and overnight lows around 15.3°C. Compared to the annual average high of 21.4°C, September runs +6.4°C.
September in Chapel Hill averages a daytime high of 27.8°C and an overnight low of 15.3°C.
September runs +6.4°C compared to Chapel Hill's annual average high of 21.4°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 27.8°C and cooler evenings around 15.3°C.