Weather will likely play an important role when you plan your trip to Sipadan Island, but bear 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 temperature of 28°C, while the coldest months are February and January, with an average of 27°C. The snowiest months in Sipadan Island are May, April, January and February, with each month seeing an average of 64 cm of snowfall.