Other facts from our historical weather data: Which months have the greatest rainfall in Cerf Island? Most rainfall (rainy season) is seen in January, February, May, November and December. Which is the hottest month in Cerf Island? April has an average maximum temperature of 30°C (86°F) and is the hottest month of the year. Which is the coolest month in Cerf Island? The coolest month is August with an average maximum temperature of 27°C (81°F). Which is the wettest month in Cerf Island? January tops the wettest month list with 241mm (9.5 in) of rainfall. Which is the driest month in Cerf Island? July is the driest month with 70mm (2.8 in) of precipitation. Which is the sunniest month in Cerf Island? May is the sunniest month with an average of 254 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.