Planning for the weather is an important factor for making your trip to Ang Thong a success, especially when you're splurging. The hottest months are usually May and June with an average temp of 84°F, while the coldest months are January and February with an average of 81°F. The rainiest months in Ang Thong are November, October, September, and December, with each month seeing an average of 11 inches of rainfall.