You might spend a lot of your vacation inside, but if you want to see more of the area, looking at local weather trends is a good idea. The hottest months are usually March and April with an average temp of 80°F, while the coldest months are July and August with an average of 79°F. The rainiest months in General Santos are June, May, July, and November, with each month seeing an average of 13 inches of rainfall.