In December, Rio de Mouro typically sees daytime highs of 14.8°C and overnight lows around 9.1°C. Compared to the annual average high of 18.4°C, December runs -3.6°C.
December in Rio de Mouro averages a daytime high of 14.8°C and an overnight low of 9.1°C.
December runs -3.6°C compared to Rio de Mouro's annual average high of 18.4°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 14.8°C and cooler evenings around 9.1°C.