Visiting local bars in Arcos de Valdevez is more fun when you know what the weather holds. These temperatures and rainfall averages can help you decide the best time for bar-hopping. The hottest months are usually August and July, with an average temperature of 20°C, while the coldest months are February and January, with an average of 10°C. The rainiest months in Arcos de Valdevez are October, December, November and January, with each month seeing an average of 231 mm of rainfall.