January in Rockingham is the windiest and the sunniest month of the year. In January, the weather in Rockingham is typically warm. Average daily high temperature in January is about 23 degrees above zero. On average, Rockingham has 25 sunny, 4 partly cloudy, and 2 rainy days in January. The rains are usually light. January as well as February, March, and December is considered the most comfortable time to visit Rockingham.