January in Galway is the coldest month of the year. In January, the weather in Galway is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Galway has 15 rainy, 8 partly cloudy, 6 cloudy, and 2 sunny 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 Galway.