Weather will likely play an important role when you plan your trip to Thai Dong, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 82°F, while the coldest months are January and December with an average of 76°F. The rainiest months in Thai Dong are August, July, May, and September, with each month seeing an average of 18 inches of rainfall.