January in Gustavia is the windiest and the sunniest month of the year. In January, the weather in Gustavia is typically warm. Average daily high temperature in January is about 26 degrees above zero. On average, Gustavia has 25 sunny, 4 rainy, and 2 partly cloudy days in January. The rains are usually light. January as well as February and March is considered the most comfortable time to visit Gustavia.