The month of September begins today, marking the beginning of the fall semester 2021 in meteorology

Arab weather - the four seasons occur mainly due to the Earth's rotation around the sun, and the tilt of the Earth's axis during rotation. every chapter.

Beginning of fall 2022

Today (in the northern hemisphere) we bid farewell to summer and receive autumn in September (1) according to the division of seasons in meteorology, which is the unofficial start of autumn, which was determined by relying on the annual temperature cycle, climatic patterns, and season Autumn in meteorology includes the three months; September-October-November.

As for the official start of the autumn season this year, it will be on Friday (September 23, 2022), and it will last 89 days until Wednesday (December 21, 2022), as the official start of the summer season depends on the astronomical position of the Earth in relation to the sun.

Why were different dates set for the beginning of seasons in meteorology?

Determining dates for the four seasons in meteorology was due to the difference in the length of the seasons astronomically, which ranges from 89 to 93 days, so it was difficult for experts to compare statistics from one year to another. Each semester 3 months in total.

Meteorology and meteorology remain important in studying the beginnings of the seasons based on annual temperature rates, due to their proximity to what is actually happening on the ground.

More: The Four Seasons .. How does it happen? Is it witnessed in all parts of the globe?