If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Bintan: The hottest months are usually May and April with an average temp of 83°F, while the coldest months are January and February with an average of 81°F. The rainiest months in Bintan are December, November, May, and October, with each month seeing an average of 12 inches of rainfall.