Weather will likely play an important role when you plan your trip to Wuxi, and keep 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 temp of 79°F, while the coldest months are January and February with an average of 45°F. The rainiest months in Wuxi are June, July, August, and May, with each month seeing an average of 8 inches of rainfall.