If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Thong Pha Phum: 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.