Other facts from our historical weather data: Which is the warmest month in Hammerfest? July has an average maximum temperature of 14°C (57°F) and is the warmest month of the year. Which is the coldest month in Hammerfest? The coldest month is February with an average maximum temperature of -2°C (28°F). Which is the wettest month in Hammerfest? October tops the wettest month list with 118mm (4.6 in) of rainfall. Which is the driest month in Hammerfest? May is the driest month with 75mm (3 in) of precipitation. Which is the sunniest month in Hammerfest? June is the sunniest month with an average of 290 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.