August in Vyazma is the sunniest month of the year. In August, the weather in Vyazma is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Vyazma has 14 sunny, 9 partly cloudy, 7 rainy, and 1 cloudy day 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 Vyazma.