The weather during a vacation in Vietnam in December will depend on which part of the country you choose. In South Vietnam in December comes the dry season, with air temperatures of +30-33°C. So you will be able to go to Phu Quoc Island, for example, without any problems.
December is a good time to open the beach season in Vietnam. But in the northern regions, a winter vacation in Vietnam gives you the opportunity to see the local sights at comfortable temperatures of +21-23°C. In such weather you can easily see the pagodas in and around Hanoi.
In addition, a tour to Vietnam in December gives you the opportunity to get out to one of the thermal springs, where you can thoroughly improve your health with the help of salt-infused water and mud. But it is better not to go to Central Vietnam in December. Typhoons are still raging there in this month, and you can find yourself in the very storm of the elements.
Holidays in December in Vietnam vary from province to province. For example, in Lam Dong province, you will get to attend a tea ceremony in December, while in Soc Trang province, the Khmer festival of Oc Om Boc is celebrated at the same time. And, if you join in, you can see the launching of paper pigeons by many locals.