Weather is probably a major factor when you plan your trip to Huai Khrai, 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 80°F, while the coldest months are January and December with an average of 68°F. The rainiest months in Huai Khrai are August, July, September, and June, with each month seeing an average of 13 inches of rainfall.