In September, Gualeguaychu typically sees daytime highs of 20.4°C and overnight lows around 8.4°C. Compared to the annual average high of 23.4°C, September runs -3.1°C.
September in Gualeguaychu averages a daytime high of 20.4°C and an overnight low of 8.4°C.
September runs -3.1°C compared to Gualeguaychu's annual average high of 23.4°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 20.4°C and cooler evenings around 8.4°C.