In September, Cape Town typically sees daytime highs of 19.2°C and overnight lows around 10.4°C. Compared to the annual average high of 21.2°C, September runs -2.0°C.
September in Cape Town averages a daytime high of 19.2°C and an overnight low of 10.4°C.
September runs -2.0°C compared to Cape Town's annual average high of 21.2°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 19.2°C and cooler evenings around 10.4°C.