December in Kinsale is the windiest month of the year. In December, the weather in Kinsale is typically warm. Average daily high temperature in December is about 9 degrees above zero. On average, Kinsale has 14 rainy, 7 cloudy, 5 sunny, and 5 partly cloudy days in December. The rains are usually heavy. December as well as January, February, March, and May is considered the most uncomfortable time to visit Kinsale.