Though weather is just one factor, it can really affect your travel plans, especially when you’re planning an extended stay in Jian’ou. The hottest months are usually July and August with an average temp of 80°F, while the coldest months are January and December with an average of 53°F. The rainiest months in Jian’ou are June, May, March, and April, with each month seeing an average of 11 inches of rainfall.