August in Mamaroneck is the sunniest month of the year. In August, the weather in Mamaroneck is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Mamaroneck has 16 sunny, 10 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 Mamaroneck.