July in Bad Gastein is the warmest month of the year. In July, the weather in Bad Gastein is typically warm. Average daily high temperature in July is about 18 degrees above zero. On average, Bad Gastein has 21 rainy, 6 sunny, and 4 partly cloudy days in July. The rains are usually heavy. July as well as April, May, June, and August is considered the most uncomfortable time to visit Bad Gastein.