Other facts from our historical weather data: Which is the warmest month in Haukadalur? July has an average maximum temperature of 15°C (59°F) and is the warmest month of the year. Which is the coldest month in Haukadalur? The coldest month is December with an average maximum temperature of 1°C (34°F). Which is the wettest month in Haukadalur? February tops the wettest month list with 204mm (8 in) of rainfall. Which is the driest month in Haukadalur? June is the driest month with 100mm (3.9 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.