August in Zurich is the sunniest month of the year. In August, the weather in Zurich is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Zurich has 19 sunny, 6 rainy, and 6 partly cloudy days in August. The rains are usually heavy. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Zurich.