Other facts from our historical weather data: Which is the warmest month in Cape Dyer? July has an average maximum temperature of 5°C (41°F) and is the warmest month of the year. Which is the coldest month in Cape Dyer? The coldest month is February with an average maximum temperature of -21°C (-6°F). Which is the wettest month in Cape Dyer? September tops the wettest month list with 77mm (3 in) of rainfall. Which is the driest month in Cape Dyer? February is the driest month with 22mm (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.