Visiting local bars in Tarakan is more fun in good weather. These rainfall averages and temperatures can help you choose the best time for bar hopping. The hottest months are usually May and June with an average temp of 82°F, while the coldest months are February and January with an average of 81°F. The rainiest months in Tarakan are December, November, January, and May, with each month seeing an average of 13 inches of rainfall.