Other facts from our historical weather data: When is winter in Vopnafjörður? The coldest season / winter is in the following months: January, February, March and December. Which is the warmest month in Vopnafjörður? August has an average maximum temperature of 12°C (54°F) and is the warmest month of the year. Which is the coldest month in Vopnafjörður? The coldest month is February with an average maximum temperature of 2°C (36°F). Which is the wettest month in Vopnafjörður? October tops the wettest month list with 158mm (6.2 in) of rainfall. Which is the driest month in Vopnafjörður? June is the driest month with 72mm (2.8 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.