January in Petrovac is the rainiest, the windiest, and the coldest month of the year. In January, the weather in Petrovac is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Petrovac has 13 sunny, 12 rainy, and 6 partly cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Petrovac.