Planning for the weather is a good way to make your trip to Tenggarong relaxing and enjoyable, especially when you're splurging. The hottest months are usually October and September, with an average temperature of 27°C, while the coldest months are July and January, with an average of 26°C. The rainiest months in Tenggarong are April, March, November and December, with each month seeing an average of 349 mm of rainfall.