Visiting local bars in Chiang Khan is more fun when you know what the weather holds. These temperatures and rainfall averages can help you determine the best time for bar-hopping. The hottest months are usually April and March, with an average temperature of 27°C, while the coldest months are January and December, with an average of 22°C. The rainiest months in Chiang Khan are August, September, July and June, with each month seeing an average of 251 mm of rainfall.