Weather will likely play an important role when you plan your trip to Bundu Tuhan, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and May with an average temp of 74°F, while the coldest months are February and January with an average of 71°F. The rainiest months in Bundu Tuhan are May, June, November, and January, with each month seeing an average of 20 inches of rainfall.