Taking into account the local weather in Hermilio Valdizán is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and October with an average temp of 72°F, while the coldest months are June and July with an average of 69°F. The rainiest months in Hermilio Valdizán are February, December, January, and March, with each month seeing an average of 21 inches of rainfall.