May in Aviemore is the sunniest month of the year. In May, the weather in Aviemore is typically cold. Average daily high temperature in May is about 9 degrees above zero. On average, Aviemore has 24 rainy, 5 cloudy, and 2 sunny days in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Aviemore.