In August, the weather in Seiser Alm is typically warm. Average daily high temperature in August is about 19 degrees above zero. On average, Seiser Alm has 17 rainy, 6 partly cloudy, 5 sunny, and 3 cloudy days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Seiser Alm.