If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Mae Sot: The hottest months are usually March and April, with an average temperature of 27°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Mae Sot are August, July, June and September, with each month seeing an average of 625 mm of rainfall.