Other facts from our historical weather data: Which is the warmest month in Kajaani? July has an average maximum temperature of 21°C (70°F) and is the warmest month of the year. Which is the coldest month in Kajaani? The coldest month is February with an average maximum temperature of -5°C (23°F). Which is the wettest month in Kajaani? July tops the wettest month list with 97mm (3.8 in) of rainfall. Which is the driest month in Kajaani? April is the driest month with 39mm (1.5 in) of precipitation. Which is the sunniest month in Kajaani? July is the sunniest month with an average of 267 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.