The summer solstice, as the 10th of the 24 solar terms, is unique in that it marks the arrival of a hot summer. Although many people think that the beginning of summer is also a sign of summer, in fact, the weather at the beginning of summer is still cool, and the summer solstice is the beginning of the real arrival of summer.
On the day of the summer solstice, the sun hits the earth at the northernmost point of the year, near the Tropic of Capricorn. At this time, the Northern Hemisphere has the longest daylight hours of the year, making the summer solstice a solar term of special significance. Because of this, the folk have the saying that "if the dog days are not hot, it depends on the summer solstice festival".
In addition, "the summer solstice will be ambushed", which indicates that the time of the annual ambush is determined according to the summer solstice solar terms. The third "Geng day" after the summer solstice is the day of ambush, which shows the close connection between the two.
Regarding the question of whether the dog days are hot this year, this article will be discussed in depth in combination with relevant agricultural proverbs, and I believe you will get a satisfactory answer after reading it.
First of all, the agricultural proverb "no rain on the summer solstice" tells us that if there is no rain on the day of the summer solstice, then the dog days will be unusually hot. This is because the summer solstice is a key node in summer, the ancients found that if there is no rain on the summer solstice, the rain on dog days is scarce, and the air humidity decreases, resulting in a rapid rise in surface temperature, coupled with strong sunlight radiation, the temperature continues to rise, thus forming a dog day with unbearable heat.
Second, the agricultural proverb "rain on the summer solstice should be early in autumn" suggests that if there is rain on the day of the summer solstice, autumn may come early, thus reducing the heat of dog days. This is because after the summer solstice rains, the subsequent rain will increase accordingly, and the air humidity will increase, which will help to alleviate the high temperatures of the summer, so that the heat of dog days will be relieved.
It is worth noting that the phrase "thunder and cold on the summer solstice" mentioned in the agricultural proverb does not refer to the colder climate, but to the relatively light heat of the dog days. In addition, if a westerly wind blows on the day of the summer solstice, it indicates that dog days are likely to be hotter.
In general, after the summer solstice, the amount of rainfall gradually increases, and usually, thunder is often accompanied by rain. This is consistent with the saying that "rain on the summer solstice should be early in autumn", indicating that if there is rain on the day of the summer solstice, the dog days of the year will not be too hot.
As for the wind, from a meteorological point of view, a westerly wind on the day of the summer solstice may indicate that the subtropical high system in the atmospheric circulation is strengthening. These weather conditions are characterized by clear skies, few clouds, strong sunlight, high temperatures, and relatively high heat during the dog days.
In summary, if there are clear skies on the day of the summer solstice (the so-called "big sunny day"), it may mean that later dry and hot weather will follow.