In September, Sao Sebastiao typically sees daytime highs of 21.7°C and overnight lows around 18.9°C. Compared to the annual average high of 24.0°C, September runs -2.3°C.
September in Sao Sebastiao averages a daytime high of 21.7°C and an overnight low of 18.9°C.
September runs -2.3°C compared to Sao Sebastiao's annual average high of 24.0°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 21.7°C and cooler evenings around 18.9°C.