Other facts from our historical weather data: Which is the warmest month in Port Appin? August has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Port Appin? The coldest month is February with an average maximum temperature of 7°C (45°F). Which is the wettest month in Port Appin? January tops the wettest month list with 246mm (9.7 in) of rainfall. Which is the driest month in Port Appin? April is the driest month with 132mm (5.2 in) of precipitation. Which is the sunniest month in Port Appin? May is the sunniest month with an average of 189 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.