In February, the weather in Trondheim is typically cold. Average daily high temperature in February is about 1 degree above zero. On average, Trondheim has 8 cloudy, 8 partly cloudy, 6 rainy, 4 sunny, and 3 snowy days in February. The rains are usually heavy. February as well as January, March, April, and May is considered the most uncomfortable time to visit Trondheim.