If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Balikpapan: 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.