Other facts from our historical weather data: Which is the warmest month in Hlíðarendi? 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 Hlíðarendi? The coldest month is December with an average maximum temperature of 3°C (37°F). Which is the wettest month in Hlíðarendi? February tops the wettest month list with 232mm (9.1 in) of rainfall. Which is the driest month in Hlíðarendi? June is the driest month with 106mm (4.2 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.