What months are spring, summer, autumn and winter?
In climate, the four seasons are distinguished by temperature. In the northern hemisphere, generally speaking, March-May is spring, June-August is summer, September-165438+1October is autumn, and12-February is winter. In the southern hemisphere, the time of each season is just the opposite of that in the northern hemisphere. It is summer in the southern hemisphere and winter in the northern hemisphere; It is winter in the southern hemisphere and summer in the northern hemisphere. There is no obvious boundary between seasons, and the change of seasons is gradual.
Beginning of spring, Changchun, beginning of autumn and beginning of winter were the four seasons in ancient China.
On the calendar published in China, next to the date of a year, there is also a lunar calendar, also called the summer calendar, which is what we usually call the "lunar calendar". According to China folk customs, the lunar month is divided into four seasons: January to March is spring, April to June is summer, July to September is autumn, and October to December is winter. Children are looking forward to "Year", which refers to the first day of the first lunar month; This day is not only the first day of the year, but also the beginning of spring in the division of lunar seasons, so it is called the Spring Festival.
2. Astronomically, vernal equinox, summer solstice, autumn equinox and winter solstice are four seasons.
3. Meteorologically, March to May is usually spring, June to August is summer, September to 165438+1October is autumn, and February to165438 is winter.
For example, in late March or the end of March, when the average temperature in Beijing rises to around 10℃, it enters spring. At this time, the peach blossoms and willow buds are green, and it is indeed full of spring; 1 1 year1late October, in Jiangsu and Zhejiang provinces, the leaves of plane trees fell, and the scenery was bleak. The average temperature was just around 10℃, and winter began. Comparing the existence and length of four seasons in different regions of China with this index, we can clearly see the differences of seasonal changes in different regions of China.