In February, the weather in Koriyama is typically freezing. Average daily high temperature in February is about zero. On average, Koriyama has 13 snowy, 9 rainy, 3 sunny, 3 cloudy, and 1 partly cloudy day in February. The snowfalls are usually moderate. February as well as March, April, June, and July is considered the most uncomfortable time to visit Koriyama.