Planning for the weather is an important factor for making your trip to Changsha County a success, 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 10°C. The rainiest months in Changsha County are June, May, July and April, with each month seeing an average of 291 mm of rainfall.