Weather will likely play an important role when you plan your trip to Mengmao, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 22°C, while the coldest months are January and December, with an average of 16°C. The rainiest months in Mengmao are July, August, June and September, with each month seeing an average of 492 mm of rainfall.