Other facts from our historical weather data: Which is the warmest month in Vestvik? August has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Vestvik? The coldest month is February with an average maximum temperature of 5°C (41°F). Which is the wettest month in Vestvik? October tops the wettest month list with 252mm (9.9 in) of rainfall. Which is the driest month in Vestvik? May is the driest month with 114mm (4.5 in) of precipitation. Which is the sunniest month in Vestvik? May is the sunniest month with an average of 226 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.