July in Phetchaburi is the cloudiest month of the year. In July, the weather in Phetchaburi is typically hot. Average daily high temperature in July is about 31 degrees above zero. On average, Phetchaburi has 28 rainy and 3 cloudy 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 Phetchaburi.