Weather will likely play an important role when you plan your trip to Chom Thong, 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 83°F, while the coldest months are January and December with an average of 73°F. The rainiest months in Chom Thong are September, August, July, and October, with each month seeing an average of 8 inches of rainfall.