May in Zeltweg is the rainiest and the windiest month of the year. In May, the weather in Zeltweg is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Zeltweg has 24 rainy, 6 sunny, and 1 partly cloudy day in May. The rains are usually heavy. May as well as March, April, June, and July is considered the most uncomfortable time to visit Zeltweg.