In September, Brentwood typically sees daytime highs of 22.8°C and overnight lows around 14.0°C. Compared to the annual average high of 15.1°C, September runs +7.7°C.
September in Brentwood averages a daytime high of 22.8°C and an overnight low of 14.0°C.
September runs +7.7°C compared to Brentwood's annual average high of 15.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.8°C and cooler evenings around 14.0°C.