Weather is probably a major factor when you plan your trip to Thong Chai, but bear in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually April and May, with an average temperature of 28°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Thong Chai are September, October, July and May, with each month seeing an average of 252 mm of rainfall.