The best time to go to Campo Maior is during the dry season, which runs from June to December. You'll find the weather more comfortable for exploring during these months.
During the dry season, the weather is generally sunny with lower humidity, making it ideal for outdoor activities like visiting the Sete Cidades National Park or exploring the local craft markets. This period is particularly good for travelers who prefer consistent pleasant weather for sightseeing and day trips.
The wet season, from January to May, brings higher temperatures and more rainfall.