If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Ungaran: The hottest months are usually September and October with an average temp of 80°F, while the coldest months are July and August with an average of 78°F. The rainiest months in Ungaran are January, December, February, and March, with each month seeing an average of 18 inches of rainfall.