December in Kalmar is the windiest month of the year. In December, the weather in Kalmar is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Kalmar has 13 rainy, 13 cloudy, 3 partly cloudy, and 2 sunny days in December. The rains are usually light. December as well as January, February, March, and October is considered the most uncomfortable time to visit Kalmar.