In September, Rock Hill typically sees daytime highs of 28.2°C and overnight lows around 16.2°C. Compared to the annual average high of 22.1°C, September runs +6.1°C.
September in Rock Hill averages a daytime high of 28.2°C and an overnight low of 16.2°C.
September runs +6.1°C compared to Rock Hill's annual average high of 22.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 28.2°C and cooler evenings around 16.2°C.