In April, the weather in Posadnikov Ostrov is typically cold. Average daily high temperature in April is about 8 degrees above zero. On average, Posadnikov Ostrov has 17 rainy, 6 cloudy, 5 sunny, and 2 partly cloudy days in April. The rains are usually moderate. April as well as March, October, and November is considered the most uncomfortable time to visit Posadnikov Ostrov.