April in Zell am Ziller is the rainiest month of the year. In April, the weather in Zell am Ziller is typically cold. Average daily high temperature in April is about 4 degrees above zero. On average, Zell am Ziller has 26 rainy, 3 sunny, and 1 cloudy day in April. The rains are usually heavy. April as well as May, June, July, and August is considered the most uncomfortable time to visit Zell am Ziller.