Taking into account the local weather in Tenggarong is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually October and September with an average temp of 80°F, while the coldest months are July and January with an average of 80°F. The rainiest months in Tenggarong are April, March, November, and December, with each month seeing an average of 14 inches of rainfall.