Planning for the weather is an important factor for making your trip to Tres Valles a success, especially when you're splurging. The hottest months are usually May and April with an average temp of 82°F, while the coldest months are January and February with an average of 71°F. The rainiest months in Tres Valles are September, August, July, and June, with each month seeing an average of 16 inches of rainfall.