July in Palmerston North is the coldest month of the year. In July, the weather in Palmerston North is typically cold. Average daily high temperature in July is about 9 degrees above zero. On average, Palmerston North has 16 rainy, 7 sunny, 5 partly cloudy, and 3 cloudy days in July. The rains are usually moderate. July as well as May, June, August, and September is considered the most uncomfortable time to visit Palmerston North.