July in Olongapo is the rainiest and the cloudiest month of the year. In July, the weather in Olongapo is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Olongapo has 31 rainy days in July. The rains are usually heavy. July as well as April, May, June, and August is considered the most uncomfortable time to visit Olongapo.