Planning for the weather is a good way to make your trip to Carenero Island relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and June with an average temp of 80°F, while the coldest months are January and February with an average of 77°F. The rainiest months in Carenero Island are November, July, December, and October, with each month seeing an average of 16 inches of rainfall.