Planning for the weather is an important factor for making your trip to Chun’an a success, especially when you’re splurging. The hottest months are usually August and July with an average temp of 80°F, while the coldest months are January and December with an average of 47°F. The rainiest months in Chun’an are June, July, May, and August, with each month seeing an average of 9 inches of rainfall.