Planning for the weather is a good way to make your trip to Yiyang relaxing and enjoyable, especially when you’re splurging. 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 9°C. The rainiest months in Yiyang are June, May, July and April, with each month seeing an average of 235 mm of rainfall.