Planning for the weather is a good way to make your trip to Bakun relaxing and enjoyable, especially when you're splurging. 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.