January weather forecast in Galveston

January in Galveston is the cloudiest and the coldest month of the year. In January, the weather in Galveston is typically warm. Average daily high temperature in January is about 17 degrees above zero. On average, Galveston has 9 rainy, 8 partly cloudy, 7 sunny, and 7 cloudy days in January. The rains are usually heavy.