Weather is probably a major factor when you plan your trip to Casisang, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May with an average temp of 72°F, while the coldest months are February and March with an average of 71°F. The rainiest months in Casisang are July, June, September, and August, with each month seeing an average of 18 inches of rainfall.