Weather will likely play an important role when you plan your trip to Calbayog, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and June, with an average temperature of 28°C, while the coldest months are February and January, with an average of 26°C. The rainiest months in Calbayog are July, September, June and October, with each month seeing an average of 333 mm of rainfall.