Winters in Rio de Mouro are cool and wet, with temperatures ranging from -4°C to 18°C, averaging around 10°C. Spring brings mild temperatures, gradually warming up to an average of 16°C by April, with highs occasionally reaching up to 25°C. Summer is warm and sunny, with July being the hottest month, often reaching highs of 38°C and averaging 21°C. Autumn is similar to spring, with temperatures cooling down gradually, ranging from 6°C to 31°C in October. The coldest months are January, November, and December, while the warmest months are June, July, and August.