August in Sydney is the sunniest and the warmest month of the year. In August, the weather in Sydney is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Sydney has 11 partly cloudy, 10 sunny, 5 rainy, and 5 cloudy days in August. The rains are usually moderate. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Sydney.