June in Zug is the rainiest month of the year. In June, the weather in Zug is typically warm. Average daily high temperature in June is about 18 degrees above zero. On average, Zug has 19 rainy, 10 sunny, and 1 partly cloudy day in June. The rains are usually heavy. June as well as January, February, March, and April is considered the most uncomfortable time to visit Zug.