January in Spa is the coldest month of the year. In January, the weather in Spa is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Spa has 17 rainy, 8 cloudy, 4 sunny, and 2 partly cloudy days in January. The rains are usually moderate. January as well as February, March, June, and November is considered the most uncomfortable time to visit Spa.