Other facts from our historical weather data: Which is the warmest month in Borkum? August has an average maximum temperature of 21°C (70°F) and is the warmest month of the year. Which is the coldest month in Borkum? The coldest month is February with an average maximum temperature of 6°C (43°F). Which is the wettest month in Borkum? August tops the wettest month list with 116mm (4.6 in) of rainfall. Which is the driest month in Borkum? April is the driest month with 53mm (2.1 in) of precipitation. Which is the sunniest month in Borkum? May is the sunniest month with an average of 218 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.