Weather is probably a major factor when you plan your trip to Tha Song Yang, 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 29°C, while the coldest months are January and December, with an average of 27°C. The rainiest months in Tha Song Yang are July, August, June and September, with each month seeing an average of 959 mm of rainfall.