August in Greenwich is the sunniest month of the year. In August, the weather in Greenwich is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Greenwich has 15 sunny, 11 partly cloudy, and 5 rainy days in August. The rains are usually light. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Greenwich.