May in Ballater is the sunniest month of the year. In May, the weather in Ballater is typically cold. Average daily high temperature in May is about 10 degrees above zero. On average, Ballater has 25 rainy, 3 sunny, and 3 cloudy days in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Ballater.