July in Prachuap Khiri Khan is the cloudiest month of the year. In July, the weather in Prachuap Khiri Khan is typically hot. Average daily high temperature in July is about 29 degrees above zero. On average, Prachuap Khiri Khan has 18 rainy and 13 cloudy days in July. The rains are usually moderate. July as well as May, September, and October is considered the most uncomfortable time to visit Prachuap Khiri Khan.