Other facts from our historical weather data: When is the rainy season in Calén? Rainy season in Calén occurs in the months of May, June, July, August and September. Which is the warmest month in Calén? February has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Calén? The coldest month is July with an average maximum temperature of 11°C (52°F). Which is the wettest month in Calén? June tops the wettest month list with 250mm (9.8 in) of rainfall. Which is the driest month in Calén? January is the driest month with 78mm (3.1 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.