Is it getting colder after the autumnal equinox?

It will get cold after the autumnal equinox.

On the day of the autumnal equinox, day and night are twelve hours long. From this day on, the days are getting shorter and shorter, the sunshine time is getting less and less, and the weather is getting colder and colder. Since the vernal equinox, the weather has turned cold. After the autumnal equinox, the polar night range near the North Pole and the polar sun range near the South Pole gradually expanded.

Climatic conditions of autumnal equinox

According to the lunar calendar, "beginning of autumn" is the beginning of autumn and ends with "the first frost". The "vernal equinox" is exactly half of the 90 days from beginning of autumn to the first frost. At the autumnal equinox, the Yangtze River basin and its vast northern area have entered autumn, and the daily average temperature has dropped below 22℃.

The cold air mass in the north began to have some influence. In most areas, the rainy season has just ended, with a cool breeze blowing gently, the sky is high and the clouds are light in Wan Liqing, the air is crisp in autumn, the sweet-scented osmanthus is fragrant, the crab is fat and the chrysanthemum is yellow, and the autumn equinox is a beautiful and pleasant season. It is also an important solar term in agricultural production. After the autumnal equinox, the direct sunlight moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, while the ground lost more heat and the temperature dropped significantly.