Planning for the weather is an important factor for making your trip to Nai Mueang a success, especially when you’re splurging. The hottest months are usually April and March with an average temp of 86°F, while the coldest months are January and December with an average of 77°F. The rainiest months in Nai Mueang are September, August, July, and May, with each month seeing an average of 9 inches of rainfall.