Taking into account the local weather in Giaoag is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually March and November with an average temp of 80°F, while the coldest months are August and September with an average of 77°F. The rainiest months in Giaoag are January, February, December, and March, with each month seeing an average of 11 inches of rainfall.