In December, the weather in Aviemore is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Aviemore has 12 cloudy, 11 rainy, 6 partly cloudy, 1 snowy, and 1 sunny day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Aviemore.