Planning for the weather is a good way to make your trip to Khlong Yai relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and March with an average temp of 81°F, while the coldest months are January and February with an average of 78°F. The rainiest months in Khlong Yai are September, July, August, and June, with each month seeing an average of 20 inches of rainfall.