If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Balikpapan: The hottest months are usually October and April, with an average temperature of 27°C, while the coldest months are January and February, with an average of 27°C. The rainiest months in Balikpapan are April, March, December and January, with each month seeing an average of 301 mm of rainfall.