Taking into account the local weather in Ðiệp Sơn can help you maximize your time at the pool during your trip. 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 Ðiệp Sơn are November, October, December, and September, with each month seeing an average of 13 inches of rainfall.