Weather is probably a major factor when you plan your trip to Thong Pha Phum, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 26°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Thong Pha Phum are July, August, September and June, with each month seeing an average of 319 mm of rainfall.