During this period, the Arctic Circle transitions from continuous daylight to long periods of darkness, while the Antarctic Circle begins to emerge from its extended night, with the sun rising again after months of darkness.
Residents across the UAE may soon be looking at the end of summer. September is expected to be the last month of the season. Temperatures are set to drop gradually at night, with a further drop in the second half of the month.
Temperatures will start dropping below 25 degrees Celsius at night and 40 degrees Celsius during the day
When the sun is directly proportional to the equator, the northern and southern hemispheres will see an equal amount of rays.
The board chairman of the Emirates Astronomical Society and a member of the Arab Union for Astronomy and Space Sciences, highlighted that following the autumnal equinox, day and night will be of equal length in the UAE. From this point on, the nights will gradually get longer than the days as we move into winter.
In contrast, the polar regions experience much more extreme changes. During this period, the Arctic Circle transitions from continuous daylight to long periods of darkness, while the Antarctic Circle begins to emerge from its extended night, with the sun rising again after months of darkness.
He also noted that early autumn evenings would reveal several prominent star constellations. Notable among them are the Big Dipper and the Great Square of Pegasus, also known as the Square of Aquarius in Arab astronomy, which will be visible in the eastern sky. The following meteor shower peaks occur in the fall: the Orionids from October 20-22, the Leonids from November 16-18 and the Geminids from December 13-15.
Starting from the autumnal equinox, temperatures are expected to drop below 25°C at night and below 40°C during the day, ushering in milder weather. Nighttime coolness will become noticeable when temperatures drop below 20°C, which usually occurs from mid-October to mid-April. On the other hand, daytime cooling will begin when temperatures drop below 30°C, usually occurring from mid-November to mid-March.
Additionally, the winter monsoon season begins in early November and lasts until the end of March. During this period, about 22 percent of the year’s total precipitation occurs, with the latter half of autumn seeing the most significant precipitation. High humidity levels during this time will contribute to morning fog and dew formation, especially from mid-September to mid-November.
In September, residents can expect rain and thunderstorms in some parts of the country, according to the National Center of Meteorology forecast. This is the result of expected cumulonimbus cloud formation in the eastern region. It may also extend inland, bringing rain of varying intensity.
There is also a forecast of fresh air, sometimes blowing dust, resulting in poor visibility This is the effect of the gradual weakening of the Indian monsoon depression and the desert thermal depression over the Arabian Peninsula.
Humidity will increase compared to August, especially in the second half of the month. Chances of mist and fog will increase in some parts of the country, with relative humidity at 49 percent.
The end of high summer was marked on 24 August by the appearance of the star Suhail, also known as the ‘Star of Yemen’.
After the star is seen, there is a period of 40 days when the weather alternates between maximum heat and cool temperatures. This period is also known as ‘Sufriya’.
By mid-October, the weather is expected to gradually stabilize. It is also known as ‘Wasm’ period.
100 days after the rise of Suhail Nakshatra, the cold winter season will begin.
