May in Waldshut-Tiengen is the rainiest month of the year. In May, the weather in Waldshut-Tiengen is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Waldshut-Tiengen has 25 rainy, 4 sunny, 1 cloudy, and 1 partly cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Waldshut-Tiengen.