Planning for the weather is an important factor for making your trip to Valle de Bravo a success, especially when you're splurging. The hottest months are usually April and May with an average temp of 66°F, while the coldest months are January and December with an average of 59°F. The rainiest months in Valle de Bravo are July, August, September, and June, with each month seeing an average of 18 inches of rainfall.