June in Wanganui is the cloudiest month of the year. In June, the weather in Wanganui is typically warm. Average daily high temperature in June is about 12 degrees above zero. On average, Wanganui has 14 rainy, 6 sunny, 5 cloudy, and 5 partly cloudy days in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Wanganui.