Other facts from our historical weather data: Which is the warmest month in Hnífsdalur? July has an average maximum temperature of 11°C (52°F) and is the warmest month of the year. Which is the coldest month in Hnífsdalur? The coldest month is March with an average maximum temperature of 1°C (34°F). Which is the wettest month in Hnífsdalur? December tops the wettest month list with 153mm (6 in) of rainfall. Which is the driest month in Hnífsdalur? June is the driest month with 52mm (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.