Planning for the weather is a good way to make your trip to Wuxi relaxing and enjoyable, especially when you’re splurging. 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.