April in Kajaani is the rainiest month of the year. In April, the weather in Kajaani is typically cold. Average daily high temperature in April is about 3 degrees above zero. On average, Kajaani has 17 rainy, 9 cloudy, 3 sunny, and 1 partly cloudy day in April. The rains are usually light. April as well as June, September, and October is considered the most uncomfortable time to visit Kajaani.