August in Ostrovnoye is the sunniest month of the year. In August, the weather in Ostrovnoye is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Ostrovnoye has 17 sunny, 10 partly cloudy, and 4 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 Ostrovnoye.