Weather is probably a major factor when you plan your trip to Playa Grande, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and February with an average temp of 83°F, while the coldest months are December and January with an average of 81°F. The rainiest months in Playa Grande are October, September, June, and May, with each month seeing an average of 15 inches of rainfall.