Other facts from our historical weather data: Which is the warmest month in Vuonislahti? July has an average maximum temperature of 22°C (72°F) and is the warmest month of the year. Which is the coldest month in Vuonislahti? The coldest month is February with an average maximum temperature of -5°C (23°F). Which is the wettest month in Vuonislahti? July tops the wettest month list with 98mm (3.9 in) of rainfall. Which is the driest month in Vuonislahti? April is the driest month with 41mm (1.6 in) of precipitation. Which is the sunniest month in Vuonislahti? July is the sunniest month with an average of 259 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.