Weather will likely play an important role when you plan your trip to Zigong, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July with an average temp of 79°F, while the coldest months are January and December with an average of 53°F. The rainiest months in Zigong are July, August, June, and September, with each month seeing an average of 8 inches of rainfall.