It is hotter at noon than in the morning because the sun shines directly on the ground at noon and obliquely on the ground in the morning. It can be seen that when the sun is in direct sunlight, the ground and the air receive more solar radiation heat at the same time and in the same area than when the sun is oblique in the morning, so they are heated the most. So it is hotter at noon than in the morning.
In fact, the hot and cold weather mainly depends on the temperature. The main factor affecting the temperature is determined by the radiation intensity of the sun, but solar photothermal is not the main reason for directly raising the temperature.
Because the direct absorption of sunlight by air is only a small part of the total solar radiation, most of it is absorbed by the ground. After the ground absorbs the solar radiation heat, it is conducted upward to the air through radiation, convection and other heat transfer methods, which is the main reason for the temperature rise.
Extended data
The earth's orbit around the sun is elliptical. Every year, it is closest to the sun at 1 (called perihelion) and farthest in July (called apohelion), with an average distance of 654.38+496 million kilometers (called 1 astronomical unit in astronomy). According to the average distance, it takes about 8 minutes 19 seconds for light to travel from the sun to the earth.
The energy in sunlight supports the growth of all living things on the earth through photosynthesis, and also dominates the climate and weather of the earth. Humans have always believed that the sun has a great influence on the earth since prehistoric times, and many cultures worship the sun as a god.
The correct scientific understanding of the sun is progressing slowly. Until the beginning of19th century, outstanding scientists had a little understanding of the material composition and energy source of the sun.
Reference materials? Baidu Encyclopedia-Sun