January in Kilkenny is the coldest month of the year. In January, the weather in Kilkenny is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Kilkenny has 15 rainy, 10 cloudy, 4 sunny, and 2 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Kilkenny.