August in Armonk is the sunniest month of the year. In August, the weather in Armonk is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Armonk has 16 sunny, 9 partly cloudy, and 6 rainy 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 Armonk.