July in Port Pirie is the rainiest and the coldest month of the year. In July, the weather in Port Pirie is typically warm. Average daily high temperature in July is about 14 degrees above zero. On average, Port Pirie has 17 sunny, 9 partly cloudy, and 5 rainy days in July. The rains are usually light. July as well as August is considered the most uncomfortable time to visit Port Pirie.