Weather is probably a major factor when you plan your trip to Wanzai, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 27°C, while the coldest months are January and December, with an average of 10°C. The rainiest months in Wanzai are June, May, April and July, with each month seeing an average of 309 mm of rainfall.