March in Riihimaki is the sunniest month of the year. In March, the weather in Riihimaki is typically cold. Average daily high temperature in March is about 1 degree above zero. On average, Riihimaki has 11 partly cloudy, 9 cloudy, 7 sunny, 3 snowy, and 1 rainy day in March. The snowfalls are usually light. March as well as April, October, November, and December is considered the most uncomfortable time to visit Riihimaki.