Planning for the weather is a good way to make your trip to Arouca relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July with an average temp of 68°F, while the coldest months are January and February with an average of 50°F. The rainiest months in Arouca are December, October, January, and November, with each month seeing an average of 8 inches of rainfall.