In August, the weather in Sankt Johann in Tirol is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Sankt Johann in Tirol has 18 rainy, 6 sunny, 4 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Sankt Johann in Tirol.