August in Zamboanga is the windiest and the coldest month of the year. In August, the weather in Zamboanga is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Zamboanga has 29 rainy and 2 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Zamboanga.