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 23 rainy, 4 snowy, 2 sunny, and 2 cloudy 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.