December in Erfurt is the rainiest, the windiest, and the cloudiest month of the year. In December, the weather in Erfurt is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Erfurt has 16 cloudy, 12 rainy, and 3 sunny days in December. The rains are usually light. December as well as January, February, and November is considered the most uncomfortable time to visit Erfurt.