In September, Mandurah typically sees daytime highs of 18.8°C and overnight lows around 10.7°C. Compared to the annual average high of 22.1°C, September runs -3.3°C.
September in Mandurah averages a daytime high of 18.8°C and an overnight low of 10.7°C.
September runs -3.3°C compared to Mandurah's annual average high of 22.1°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 18.8°C and cooler evenings around 10.7°C.