In September, Brookhaven typically sees daytime highs of 28.3°C and overnight lows around 16.6°C. Compared to the annual average high of 22.1°C, September runs +6.2°C.
September in Brookhaven averages a daytime high of 28.3°C and an overnight low of 16.6°C.
September runs +6.2°C compared to Brookhaven's annual average high of 22.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 28.3°C and cooler evenings around 16.6°C.