Why is 202 1 not hot this year?

The reason why the weather is not hot now, it should be said that it is not yet time, and it is only hot every June 1 day. ?

There are still many unknown changes in nature. Earth plate movement, sudden change of weather, hot and cold, and large temperature difference between day and night. It shows that the weather has changed a lot, and it is not surprising that such changeable and unstable weather has appeared this year.

Maybe the high temperature is still behind. As the saying goes, summer in beginning of autumn is just summer, and neither summer nor summer is summer. This fully shows that even if beginning of autumn enters summer in July, there is still the possibility of high temperature, and the heat of "autumn tiger" is even more amazing. Maybe this summer's high temperature is yet to come.

The dog days, which appear between the summer heat and the summer heat, are the period with the highest temperature, the highest humidity and the most severe sultry heat in a year.

"V" means being forced to hide underground. There are three kinds of fu: initial fu, middle fu and final fu, and their dates are determined by the solar terms and dates of the dry branch calendar. After "entering the volt", many places in the country will enter the continuous high temperature mode.

The traditional almanac stipulates that "counting from the third Geng day in summer", that is to say, "counting down from the summer day until the third Geng day" is about to begin to dormant. The "Geng Day" here refers to the days prefixed with "Geng" in the ancient "Ganzhi Jiri Law".

The length of dog days mainly lies in the difference between middle and next days. Because the third Geng day (the first autumn) after the summer solstice solar term occurs at different times every year, the number of days in the middle autumn is also different. The incubation time is long or short, which may be 10 day or 20 days. So there are two situations: some years are 30 days in dog days, and some years are 40 days.