How long does the cold spring usually last?

A cold in late spring usually lasts 3-5 days, but sometimes it can last as long as 2 weeks. Due to the frequent attacks of strong cold air, the temperature dropped rapidly. Late spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring (generally refers to March) and the temperature in late spring cold (generally refers to April or May) is lower than normal. This kind of weather, which is warm before spring and cold after spring, is called cold after beginning of spring. The climate is changeable in early spring. If the cold air is strong, the temperature can drop to below 10℃.

Late spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring (generally refers to March in the northern hemisphere), but the temperature is lower than normal in late spring cold (generally refers to April or May). It is mainly caused by long-term rainy weather or frequent invasion of cold air, or by strong radiation cooling in sunny nights under the control of cold anticyclone. If the average temperature in late spring is more than 2℃ lower than normal, it is considered as cold weather in late spring, which can cause harm to agricultural production, especially in the early stage of late spring, which is higher than normal, and in the later stage, the temperature is lower. Simply put, in spring, the weather gets warmer, and the temperature drops obviously due to the invasion of cold air, which is harmful to crops. This kind of "warm before spring, cold after spring" weather is called late spring cold.

cause

In meteorology, spring is the season with the greatest changes in meteorological elements such as temperature, airflow and air pressure. Entering March means the beginning of spring, and the temperature rises rapidly. The real average temperature in spring should exceed 10℃. The climate in spring is changeable. Although it is gradually warming up, it is still cold in the morning and evening, and the number of cold air activities is also frequent. Long-term rainy weather or frequent cold air attacks, or under the control of continuous cold and high pressure, strong radiation cooling on sunny nights will lead to the temperature drop. If the cold air is strong, the temperature will drop sharply below 10℃, and even rain and snow will occur, thus forming the phenomenon of "late spring cold".

Cold in late spring and pre-cold method:

1, when the temperature drops suddenly, pay attention to add clothes to keep warm, especially to keep warm hands, mouth and nose;

2. Strengthen physical exercise and improve physical fitness;

3. Pay attention to rest, maintain emotional stability, and avoid excessive fatigue and mental stress;

4. Eat more garlic, onion, celery and other foods during the cold spring.