Characteristics of solar terms in autumnal equinox

The equinox solar terms are characterized by equal time between day and night, gradually decreasing temperature, increasing temperature difference between day and night, dryness and lack of rain, first frost and starry sky in autumn.

1, and the time of day and night is equal.

At the autumnal equinox, the sun shines directly on the equator, and the length of day and night is equal, each being 12 hour. This is one of the most striking features of the autumnal equinox.

2. The temperature drops gradually

After the autumnal equinox, the temperature gradually decreased, but the rate of decline was slower than that of cold dew and first frost. The climate of this period is characterized by cool and pleasant.

3. The temperature difference between day and night increases.

As the temperature gradually decreases and the temperature difference between day and night gradually increases, it is necessary to put on some warm clothes to keep the body temperature in the morning and evening.

4. Dry and little rain

In the autumn equinox, the air humidity is low, the weather is dry, and there is little rain. It is necessary to replenish more water to keep healthy.

The first frost phenomenon appeared.

After the autumnal equinox, the first frost will appear in some areas, which is caused by the decrease of temperature and the condensation of water vapor on the surface of plants.

6. Starry sky in autumn

At the autumnal equinox, you can see the Big Dipper facing down at night, which means that the autumn starry sky officially begins. The constellations in the autumn sky are bright and easy to identify.