The five characteristics of summer are: the weather is hot in summer, sometimes it rains heavily, the morning is early, the night is late, the day is long and the night is short; There are many animal activities in summer; Plants grow luxuriantly in summer; Summer is the busiest period for farmers, who have to work in three summers (summer harvest, summer sowing and summer management); In summer, people wear light-colored and thin clothes.

Summer, the second of the four seasons, is the hottest season in a year in the northern hemisphere. China is used to taking long summer as the beginning of summer, and the summer in meteorology will be postponed to about 25 days after long summer. The ancients regarded April, May and June of the lunar calendar as "summer", while today people regard June, July and August of the Gregorian calendar as "summer", while westerners generally call summer solstice and autumn as summer.