March in Reykyavik is the sunniest month of the year. In March, the weather in Reykyavik is typically cold. Average daily high temperature in March is about 2 degrees above zero. On average, Reykyavik has 10 cloudy, 9 rainy, 5 sunny, 5 partly cloudy, and 2 snowy days in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Reykyavik.