If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Tuban: The hottest months are usually March and April with an average temp of 81°F, while the coldest months are August and September with an average of 78°F. The rainiest months in Tuban are December, January, November, and February, with each month seeing an average of 10 inches of rainfall.