Weather is probably a major factor when you plan your trip to Tha Pho, but bear 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 temperature of 30°C, while the coldest months are December and January, with an average of 26°C. The rainiest months in Tha Pho are August, September, July and June, with each month seeing an average of 325 mm of rainfall.