July in Christchurch is the coldest month of the year. In July, the weather in Christchurch is typically cold. Average daily high temperature in July is about 9 degrees above zero. On average, Christchurch has 11 sunny, 11 partly cloudy, 5 rainy, and 4 cloudy days in July. The rains are usually light. July as well as May, June, and August is considered the most uncomfortable time to visit Christchurch.