If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Tarakan: The hottest months are usually May and June, with an average temperature of 28°C, while the coldest months are February and January, with an average of 27°C. The snowiest months in Tarakan are May, April, January and February, with each month seeing an average of 64 cm of snowfall.