January in Nags Head is the coldest month of the year. In January, the weather in Nags Head is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Nags Head has 12 sunny, 11 partly cloudy, and 8 rainy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Nags Head.