Planning for the weather is a good way to make your trip to Balikpapan relaxing and enjoyable, especially when you’re splurging. The hottest months are usually October and April with an average temp of 81°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Balikpapan are April, March, December, and January, with each month seeing an average of 12 inches of rainfall.