In September, Brighton typically sees daytime highs of 17.7°C and overnight lows around 11.2°C. Compared to the annual average high of 13.0°C, September runs +4.7°C.
September in Brighton averages a daytime high of 17.7°C and an overnight low of 11.2°C.
September runs +4.7°C compared to Brighton's annual average high of 13.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.7°C and cooler evenings around 11.2°C.