Planning for the weather is a good way to make your trip to Kengtung relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and May, with an average temperature of 24°C, while the coldest months are January and December, with an average of 17°C. The rainiest months in Kengtung are August, July, September and June, with each month seeing an average of 359 mm of rainfall.