Is the solstice in summer the hottest time?

No, June 2nd1or 22nd is the summer solstice. On the day of summer solstice, the direct position of the sun on the ground reaches the northernmost point of the year, almost directly to the Tropic of Cancer, and the daytime in the northern hemisphere is the longest, and the farther north it is, the longer it is. This is the longest day of the year in the northern hemisphere. Although the summer solstice has the longest day and the highest sun angle, it is not the hottest time of the year. Because the heat is close to the surface, it is still saving at this time and has not reached the maximum.

Summer solstice: Summer solstice is the tenth of the 24 solar terms. The "Twenty-four solar terms" were originally determined by the bucket handle direction of Beidou, which means noon, that is, the summer solstice. The current "twenty-four solar terms" are divided by the method of "constant gas", that is, each solar term corresponds to a certain position reached by the earth every time it runs 15 on the ecliptic, and the summer solstice is when the sun runs to 90 degrees on the ecliptic. Seen from the ecliptic plane, the sun is on the background of Taurus, Gemini and Cancer. The summer solstice is the northernmost day of the sun in a year, the limit of the sun's northward movement and the longest day in the northern hemisphere. The higher the latitude, the longer the days. This is because the "long day and short night effect" caused by the tilt of the earth's rotation axis is more obvious as it approaches two levels. On the day of the summer solstice, except the south pole of the Antarctic circle and the polar night area, the sunrise direction in all parts of the earth starts from the northeast and sets in the northwest. The summer solstice is the northernmost day of the sun in a year and the limit of the sun's northward movement. On this day, the northern hemisphere gets the most solar radiation, almost twice as much as the southern hemisphere. After the summer solstice, the Tropic of Cancer and its northern region, the midday sun height angle also began to decrease.