Weather is probably a major factor when you plan your trip to Bakun, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and April with an average temp of 72°F, while the coldest months are January and February with an average of 70°F. The rainiest months in Bakun are July, August, September, and June, with each month seeing an average of 28 inches of rainfall.