November in Opatija is the rainiest month of the year. In November, the weather in Opatija is typically warm. Average daily high temperature in November is about 10 degrees above zero. On average, Opatija has 16 rainy, 8 sunny, 4 partly cloudy, and 2 cloudy days in November. The rains are usually heavy. November as well as January, February, and December is considered the most uncomfortable time to visit Opatija.