In September, Petropolis typically sees daytime highs of 27.0°C and overnight lows around 16.6°C. Compared to the annual average high of 28.2°C, September runs -1.2°C.
September in Petropolis averages a daytime high of 27.0°C and an overnight low of 16.6°C.
September runs -1.2°C compared to Petropolis's annual average high of 28.2°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 27.0°C and cooler evenings around 16.6°C.