Climatic characteristics of solar terms in autumnal equinox What's the weather like in autumnal equinox?

From the day of the autumnal equinox, the climatic characteristics of the autumnal equinox solar terms are mainly manifested in three characteristics:

1, the position of direct sunlight continues to move from the equator to the southern hemisphere, and the phenomenon of shorter days and longer nights in the northern hemisphere will become more and more obvious. The days will gradually shorten and the nights will become longer (until the winter solstice reaches the longest night and the shortest day);

2. The temperature difference between day and night will gradually increase, and the amplitude will be higher than10℃;

The temperature drops day by day, getting colder and colder, and gradually entering the late autumn season. The situation in the southern hemisphere is just the opposite.

Climatic characteristics of the autumnal equinox solar terms: the average daily temperature in autumn is lower than 22℃

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.

Climatic characteristics of solar terms in autumn equinox: more geothermal loss and rapid temperature drop.

After the autumnal equinox, the direct sunlight moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, but the ground lost more heat and the temperature dropped significantly. Agricultural proverbs say: "An autumn rain is a cold", "The white dew is divided into autumn nights, and one night is cold". "In August, the wild goose gate opens, and the foot of the wild goose is frosty." It is not surprising that the temperature in Northeast China drops early and frost appears at the autumnal equinox.

Climatic characteristics of the autumnal equinox solar terms: cold air heading south

On the day of the autumnal equinox, the sun is located at longitude 180 degrees, and the sunlight is almost direct to the equator, and day and night are almost equal. At this time, the waiting temperature in the southern region has generally dropped below 22℃, and it has entered a cool autumn. "An autumn rain and a cold". The cold air from the south meets the warm and humid air that gradually decays, which leads to repeated rainfall and the temperature drops again and again.