January weather forecast in Dundalk

January in Dundalk is the windiest and the coldest month of the year. In January, the weather in Dundalk is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Dundalk has 20 rainy, 7 cloudy, and 4 sunny days in January. The rains are usually moderate. January as well as February, March, April, and May is considered the most uncomfortable time to visit Dundalk.