When you're dreaming of a stay in Kok Tum, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually April and March with an average temp of 84°F, while the coldest months are January and December with an average of 74°F. The rainiest months in Kok Tum are August, July, September, and May, with each month seeing an average of 14 inches of rainfall.