In September, Rio de Mouro typically sees daytime highs of 22.1°C and overnight lows around 16.1°C. Compared to the annual average high of 18.4°C, September runs +3.7°C.
September in Rio de Mouro averages a daytime high of 22.1°C and an overnight low of 16.1°C.
September runs +3.7°C compared to Rio de Mouro's annual average high of 18.4°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 22.1°C and cooler evenings around 16.1°C.