What is the four seasons method of climate? Section five.

The climate has four seasons, divided by the average temperature (every five days). After the vernal equinox, the average temperature is above 10 degrees, that is, it enters spring; When it reaches 15 degrees, it enters summer; After beginning of autumn, it falls below 15 degrees, that is, it enters autumn, and falls below 10 degrees, that is, it enters winter.

The division of five districts is found in junior high school textbooks. The tropic of cancer and the polar circle are the dividing lines. The tropic of cancer on both sides of the equator with direct sunlight is tropical, the extreme polar regions in day and night are polar regions (north and south poles), and the area between the tropic of cancer and the polar circle is south and north temperate zones.