May in Steinkjer is the rainiest month of the year. In May, the weather in Steinkjer is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Steinkjer has 17 rainy, 7 partly cloudy, 4 sunny, and 3 cloudy days in May. The rains are usually heavy. May as well as March, April, June, and August is considered the most uncomfortable time to visit Steinkjer.