If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Song Cau: The hottest months are usually June and August with an average temp of 83°F, while the coldest months are January and February with an average of 75°F. The rainiest months in Song Cau are November, October, December, and September, with each month seeing an average of 13 inches of rainfall.