February in Koper is the windiest month of the year. In February, the weather in Koper is typically cold. Average daily high temperature in February is about 7 degrees above zero. On average, Koper has 12 rainy, 9 sunny, and 8 partly cloudy days in February. The rains are usually heavy. February as well as January, November, and December is considered the most uncomfortable time to visit Koper.