Other facts from our historical weather data: Which months have the greatest rainfall in Jiuzhaigou? Most rainfall (rainy season) is seen in May, June, July, August and September. When is winter in Jiuzhaigou? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Jiuzhaigou? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Jiuzhaigou? The coldest month is January with an average maximum temperature of -3°C (27°F). Which is the wettest month in Jiuzhaigou? July tops the wettest month list with 177mm (7 in) of rainfall. Which is the driest month in Jiuzhaigou? December is the driest month with 20mm (0.8 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.