January in Louth is the coldest month of the year. In January, the weather in Louth is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Louth has 11 rainy, 9 partly cloudy, 8 cloudy, and 3 sunny days in January. The rains are usually light. January as well as February, March, April, and May is considered the most uncomfortable time to visit Louth.