January in La Romana is the sunniest and the coldest month of the year. In January, the weather in La Romana is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, La Romana has 23 sunny, 6 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 La Romana.