June in Biella is the rainiest and the cloudiest month of the year. In June, the weather in Biella is typically warm. Average daily high temperature in June is about 17 degrees above zero. On average, Biella has 25 rainy, 4 partly cloudy, and 1 sunny day in June. The rains are usually heavy. June as well as April, May, July, and August is considered the most uncomfortable time to visit Biella.