Though weather is just one factor, it can really affect your travel plans, especially when you are planning a longer stay in Yan Ta Khao. The hottest months are usually March and April with an average temp of 81°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Yan Ta Khao are September, October, November, and May, with each month seeing an average of 12 inches of rainfall.