In September, Brentwood typically sees daytime highs of 29.7°C and overnight lows around 13.0°C. Compared to the annual average high of 22.6°C, September runs +7.1°C.
September in Brentwood averages a daytime high of 29.7°C and an overnight low of 13.0°C.
September runs +7.1°C compared to Brentwood's annual average high of 22.6°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 29.7°C and cooler evenings around 13.0°C.