When does the weather usually get cold?

It gets cold in early autumn. Beginning of autumn is the first solar term in autumn, which marks the official start of the season in Qiu Meng: "Autumn" means that summer becomes cool. When we arrived in beginning of autumn, the phoenix tree began to shed its leaves, so there is an idiom "Autumn is known by falling leaves". Autumn is the transitional season when the weather turns from hot to cold, and then from cold to cold. After beginning of autumn, there are still "crouching" and "autumn tigers" still exist. So we should pay attention to heatstroke prevention. However, a leopard cannot change his spots.

There is a "beautiful day" when it is hot at noon and cool in the morning and evening, and "one autumn rain is cold and ten autumn rains are frost." The temperature difference of more than ten degrees in the morning and evening also makes autumn a season of high incidence of various diseases.

Extended data

Meteorological characteristics:?

1, the temperature will drop gradually in autumn, but it is generally slower than in winter. Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions. ?

2. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost. ?

Astronomical features:

1. In autumn, the direct point of the sun gradually moves south from the northern hemisphere, crosses the equator after the autumnal equinox, and the sun directly shines in the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller.

At the autumnal equinox, the length of day and night is equal. In autumn, the distance between the earth and the sun is from far to near. Seen from the ecliptic plane, the sun is on the background of Leo, Virgo and Libra.