Most people are familiar with the astronomical seasons. These are defined by the Earth's position relative to the sun. Because the Earth is tilted on its axis at roughly 23.5 degrees, different parts of the planet receive varying amounts of sunlight throughout the year.
Starts around September 22 or 23 . Like the spring equinox, the sun crosses the equator again, signaling the transition into cooler months.
Understanding the timing of the four seasons requires looking at both the tilt of the Earth and the patterns of our atmosphere. Here is everything you need to know about when the seasons start and end. 1. The Astronomical Approach (Solstices and Equinoxes)
If you’ve ever noticed that it feels like summer in early June, even though the "official" start isn't until the 21st, you’re thinking like a meteorologist.
It is important to remember that seasons are inverted between the Northern and Southern Hemispheres. When the Northern Hemisphere is experiencing the Winter Solstice in December, the Southern Hemisphere (countries like Australia and Brazil) is celebrating the Summer Solstice.