August in Charlotte Amalie is the hottest month of the year. In August, the weather in Charlotte Amalie is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Charlotte Amalie has 15 rainy, 15 sunny, and 1 partly cloudy day in August. The rains are usually moderate. August as well as September, October, and November is considered the most uncomfortable time to visit Charlotte Amalie.