August in Atlantic City is the sunniest month of the year. In August, the weather in Atlantic City is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Atlantic City has 19 sunny, 7 partly cloudy, 4 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as June, July, and September is considered the most comfortable time to visit Atlantic City.