Planning for the weather is a good way to make your trip to Pulau Derawan relaxing and enjoyable, especially when you're splurging. The hottest months are usually May and June with an average temp of 82°F, while the coldest months are February and January with an average of 81°F. The snowiest months in Pulau Derawan are May, April, January, and February, with each month seeing an average of 25 inches of snowfall.