Planning for the weather is a good way to make your trip to Chiang Khong relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and March, with an average temperature of 26°C, while the coldest months are January and December, with an average of 21°C. The rainiest months in Chiang Khong are August, July, September and May, with each month seeing an average of 280 mm of rainfall.