Weather is probably a major factor when you plan your trip to Changlun, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and February, with an average temperature of 26°C, while the coldest months are January and February, with an average of 25°C. The rainiest months in Changlun are November, October, May and April, with each month seeing an average of 320 mm of rainfall.