Planning for the weather is an important factor for making your trip to Yancheng a success, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 25°C, while the coldest months are January and February, with an average of 5°C. The rainiest months in Yancheng are July, August, June and September, with each month seeing an average of 194 mm of rainfall.