why is Australian summer in December?

Australian summer falls in December, January, and February because Australia is in the Southern Hemisphere. The Earth rotates around its axis, which is tilted at an angle of about 23.5 degrees relative to its orbital plane around the Sun. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to seasonal changes.

As Australia is south of the equator, when it’s summer in the Northern Hemisphere (around June, July, and August), the Southern Hemisphere is tilted towards the Sun, exposing Australia to more direct sunlight. Consequently, Australia experiences warmer temperatures and longer days during this time, which corresponds to December, January, and February.

This opposite seasonality between the hemispheres ensures that while it’s winter in the United States and Europe, it’s summer in Australia and vice versa.

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