10 Facts About the Autumnal Equinox 2025

Arab Weather - The autumnal equinox for this year (2025) in the northern hemisphere falls on Monday, September 22, which is the astronomical/official beginning of the fall season.

Autumnal equinox date 2025

The importance of the autumnal equinox:

In addition to the fact that day and night are equal on the day of the autumnal equinox in all regions of the globe, the importance of this astronomical date and the autumn season lies in other matters, which are:

A very long night begins in the Arctic region, lasting for a full 6 months, until the vernal equinox in 2026.

In the Antarctic region, a very long day begins, lasting for a full 6 months, until March 2026.

Astronomically, autumn begins in the northern hemisphere, while spring begins in the southern hemisphere.

On this date, the sun is directly overhead on the equator, and no shadows form at noon in the places through which this equator passes.

The sun rises exactly in the east and sets exactly in the west.

Everyone on Earth can determine their directions accurately on this day.

After this date, the night becomes longer and the day becomes shorter in the northern hemisphere.

Autumn is considered the actual beginning of the rainy season in many Arab countries.

Autumn lasts 91 days until the winter solstice in December.

Finally, temperatures decrease in the northern hemisphere and increase in the southern hemisphere.