July in Phitsanulok is the rainiest month of the year. In July, the weather in Phitsanulok is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Phitsanulok has 31 rainy days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Phitsanulok.