Question: when will the weather cool down sydney?
Answer: Winter (June – August) Sydney's winter months are June to August when average temperatures drop between 8.8 - 17°C (47.8 - 62.6°F). Sydney's rainfall is generally highest in June, with an average of 132 mm (5.2 inches), while July is the coolest month when average daytime temperatures reach just 13°C (55°F).