May in Inverness is the sunniest month of the year. In May, the weather in Inverness is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Inverness has 12 rainy, 8 cloudy, 6 partly cloudy, and 5 sunny days in May. The rains are usually light. May as well as January, February, March, and April is considered the most uncomfortable time to visit Inverness.