January weather forecast in Roscommon

January in Roscommon is the windiest, the sunniest, and the coldest month of the year. In January, the weather in Roscommon is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Roscommon has 22 rainy, 4 sunny, 4 cloudy, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Roscommon.