Other facts from our historical weather data: Which is the warmest month in Vestmannaeyjar? August has an average maximum temperature of 13°C (55°F) and is the warmest month of the year. Which is the coldest month in Vestmannaeyjar? The coldest month is February with an average maximum temperature of 7°C (45°F). Which is the wettest month in Vestmannaeyjar? February tops the wettest month list with 201mm (7.9 in) of rainfall. Which is the driest month in Vestmannaeyjar? June is the driest month with 90mm (3.5 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.