January in Saint-Tropez is the coldest month of the year. In January, the weather in Saint-Tropez is typically warm. Average daily high temperature in January is about 11 degrees above zero. On average, Saint-Tropez has 14 sunny, 13 partly cloudy, and 4 rainy days in January. The rains are usually moderate. January as well as February and December is considered the most uncomfortable time to visit Saint-Tropez.