Other facts from our historical weather data: Which is the warmest month in Plimmerton? February has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Plimmerton? The coldest month is July with an average maximum temperature of 13°C (55°F). Which is the wettest month in Plimmerton? June tops the wettest month list with 127mm (5 in) of rainfall. Which is the driest month in Plimmerton? March is the driest month with 80mm (3.1 in) of precipitation. Which is the sunniest month in Plimmerton? January is the sunniest month with an average of 234 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.