April in Vyazniki is the rainiest month of the year. In April, the weather in Vyazniki is typically cold. Average daily high temperature in April is about 9 degrees above zero. On average, Vyazniki has 16 rainy, 7 cloudy, 5 sunny, and 2 partly cloudy days in April. The rains are usually light. April as well as January, March, October, and November is considered the most uncomfortable time to visit Vyazniki.