Other facts from our historical weather data: Which is the warmest month in Haines Junction? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Haines Junction? The coldest month is January with an average maximum temperature of -16°C (3°F). Which is the wettest month in Haines Junction? October tops the wettest month list with 74mm (2.9 in) of rainfall. Which is the driest month in Haines Junction? April is the driest month with 23mm (0.9 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.