---
title: "Summer Solstice: The Heat Has Yet to Arrive"
url: https://tiercooling.com/posts/summer-solstice-the-heat-has-yet-to-arrive/
date: 2021-06-21
modified: 2026-09-28
lang: en
author: "info@tiercooling.com"
description: "The Summer Solstice is one of the twenty-four solar terms. Each year on June 21 or 22 of the Gregorian calendar, when the sun reaches the celestial longitude of 90..."
categories:
  - "News"
image: https://tiercooling.com/wp-content/uploads/2026/09/RDF-26ABT-0005-2.jpg
word_count: 469
---

# Summer Solstice: The Heat Has Yet to Arrive

**[The Summer Solstice](https://rundongfang.com/)** is one of the twenty-four solar terms. Each year on June 21 or 22 of the Gregorian calendar, when the sun reaches the celestial longitude of 90 degrees, the Summer Solstice arrives. At this time, the sun’s direct rays reach their northernmost point of the year, nearly shining directly on the Tropic of Cancer, and daytime in the Northern Hemisphere is at its longest. After the Summer Solstice, yin energy begins to grow while yang energy starts to decline.
“It is not hot until after the Summer Solstice” and “count the first dog days from the third Geng day after the Summer Solstice.” Although the Summer Solstice marks the arrival of hot summer, it is not yet the hottest time. Temperatures continue to rise for some time after the solstice, and the hottest weather generally comes another twenty to thirty days later.
After the Summer Solstice, the ground heats up intensely and air convection becomes strong, so from afternoon to evening, thunderstorms and rainstorms frequently form; the high-temperature “sauna” weather also appears after this time.

![](https://rundongfang.com/wp-content/uploads/xia-zhi-re-wei-zhi-2.jpg)

The Summer Solstice is divided into three pentads:
The first pentad: deer shed their antlers. Deer antlers grow forward, so they belong to yang. On the Summer Solstice, yin energy arises and yang energy begins to decline, so the yang deer begin to shed their antlers. The elk, however, belongs to yin, so it sheds its antlers on the Winter Solstice (although elks and deer belong to the same family, the ancients believed one belongs to yin and the other to yang).
The second pentad: cicadas begin to sing. After the Summer Solstice, male cicadas, sensing the birth of yin energy, beat their wings and sing.
The third pentad: pinellia sprouts. Pinellia is a shade-loving medicinal herb, named for growing in marshes or paddies in midsummer. This shows that in the hot midsummer, some shade-loving creatures begin to emerge, while yang creatures begin to decline.
Since ancient times, there has been a Chinese folk saying: “dumplings on the Winter Solstice, noodles on the Summer Solstice.” Eating noodles on the Summer Solstice is an important custom in many regions. As new wheat comes into season around the Summer Solstice, eating noodles at this time also carries the meaning of tasting the new harvest.

![](https://rundongfang.com/wp-content/uploads/xia-zhi-re-wei-zhi-1.jpg)

The Summer Solstice generally falls in the fifth lunar month, known in ancient times as the “inauspicious month”—a period of scorching heat and frequent illness. Since the Summer Solstice is a solar term of this month, many taboos and customs naturally arose under such conditions. For example, on the Summer Solstice, many places observe the taboo of “not sitting on the threshold,” believing that doing so would cause “summer fever” (zhuxia). Summer fever is an illness, mostly seen in children, in which prolonged summer heat causes problems with a child’s circulatory system, leading to fever.