Planning for the weather is a good way to make your trip to Príncipe Island relaxing and enjoyable, especially when you’re splurging. The hottest months are usually March and April with an average temp of 82°F, while the coldest months are July and August with an average of 77°F. The rainiest months in Príncipe Island are November, October, December, and April, with each month seeing an average of 10 inches of rainfall.