In September, Guaiba typically sees daytime highs of 21.9°C and overnight lows around 12.3°C. Compared to the annual average high of 24.8°C, September runs -2.9°C.
September in Guaiba averages a daytime high of 21.9°C and an overnight low of 12.3°C.
September runs -2.9°C compared to Guaiba's annual average high of 24.8°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 21.9°C and cooler evenings around 12.3°C.