Planning for the weather is a good way to make your trip to Foshan relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 85°F, while the coldest months are January and December with an average of 64°F. The rainiest months in Foshan are May, June, August, and September, with each month seeing an average of 12 inches of rainfall.