Other facts from our historical weather data: Which is the warmest month in Juankoski? 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 Juankoski? The coldest month is February with an average maximum temperature of -5°C (23°F). Which is the wettest month in Juankoski? July tops the wettest month list with 93mm (3.7 in) of rainfall. Which is the driest month in Juankoski? March is the driest month with 42mm (1.7 in) of precipitation. 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.