January in Herceg Novi is the rainiest and the coldest month of the year. In January, the weather in Herceg Novi is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Herceg Novi has 14 rainy, 11 sunny, and 6 partly cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Herceg Novi.