If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Thap Sakae: The hottest months are usually April and May with an average temp of 82°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Thap Sakae are September, October, July, and May, with each month seeing an average of 10 inches of rainfall.