If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Chongqing: 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 12°C. The rainiest months in Chongqing are June, July, May and September, with each month seeing an average of 176 mm of rainfall.