Weather is probably a major factor when you plan your trip to Bretana, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and September with an average temp of 81°F, while the coldest months are February and March with an average of 79°F. The rainiest months in Bretana are January, December, February, and November, with each month seeing an average of 17 inches of rainfall.