Planning for the weather is a good way to make your trip to Isla del Sol relaxing and enjoyable, especially when you're splurging. The hottest months are usually November and October with an average temp of 47°F, while the coldest months are June and July with an average of 42°F. The rainiest months in Isla del Sol are January, February, December, and March, with each month seeing an average of 8 inches of rainfall.