What is the relationship between solar terms and temperature?

The division of solar terms is based on the weather, and the changes of natural phenomena such as seasons, climate and phenology are fully considered.

Among them, beginning of spring, Changxia, beginning of autumn, beginning of winter, vernal equinox, autumnal equinox, summer solstice and winter solstice are used to reflect the seasons. The vernal equinox, autumnal equinox, summer solstice and winter solstice are divided from an astronomical point of view, reflecting the turning point of solar height change.

Since the Qin and Han Dynasties, China has named the 24 solar terms:

Beginning of spring, rain, sting, vernal equinox, Qingming, Grain Rain.

Long summer, small full, boundless, summer solstice, small Shu, big Shu.

Beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost.

Beginning of winter, light snow, heavy snow, winter solstice, slight cold, severe cold.