August in Rach Gia is the windiest month of the year. In August, the weather in Rach Gia is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Rach Gia has 29 rainy and 2 partly cloudy days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Rach Gia.