When will Shanghai enter winter 202 1

165438+1around the end of October. 202 1 year The solar term in beginning of winter is 202 1 year1month 7/Gregorian calendar.

Astronomical Winter: Winter is a solar term in beginning of winter. From beginning of winter's point of view, "Li" also means the beginning, so beginning of winter is the beginning of winter. At this time, except for some areas in the north, it is still winter, and many places in the south are still autumn scenery, where the temperature is neither high nor low, and it is refreshing and comfortable.

For the coastal areas of South China, beginning of winter is still crisp in autumn and even a little hot. This "winter" is not "winter". On the contrary, in the northeast and northwest, it is already a snowy scene, which naturally belongs to winter. So in order to meet the actual situation, there is a second winter standard.

Climate in winter: defined by reaching a certain temperature standard, that is, the average temperature is lower than 10 degrees Celsius for five consecutive days. According to this standard, the area north of Huaihe River in Qinling Mountains in China generally reached the standard in 1 1 and 65438+February, and some areas south of Huaihe River also reached the standard, but less. In Hainan and beginning of winter, Guangdong, it was definitely not up to standard.

Geographical differences

Li also means to establish and start; Winter means "end", that is to say, the crops should be harvested before harvesting. Beginning of winter, together with beginning of spring, Changxia and beginning of autumn, is called "Sili", which is a seasonal solar term. Four seasons alternate throughout the year, and "four stands" means the rotation of four seasons, reflecting the changing laws of phenology and climate, such as spring, long summer, autumn harvest and winter storage.

In the south of China (low latitude area), it is rainy, rainstorm, sunny and humid, and the rainfall changes obviously when the seasons change. There is little rain and dryness in the northern region, and the precipitation does not change obviously when the season changes, but the temperature changes obviously. The northern region (mid-latitude region) has a large temperature difference between winter and summer, and the temperature changes obviously in four seasons.