April in Biyavash is the rainiest month of the year. In April, the weather in Biyavash is typically cold. Average daily high temperature in April is about 7 degrees above zero. On average, Biyavash has 20 rainy, 7 cloudy, 2 sunny, and 1 partly cloudy day in April. The rains are usually moderate. April as well as January, February, September, and October is considered the most uncomfortable time to visit Biyavash.