If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Kaeng Khoi: The hottest months are usually April and March with an average temp of 86°F, while the coldest months are December and January with an average of 79°F. The rainiest months in Kaeng Khoi are September, August, July, and October, with each month seeing an average of 9 inches of rainfall.