During the summer (June, July and August) in China, the length of day and night and weather changes in most parts of China are () A. The days are getting longer and the weather is getting worse.

When the sun shines directly at the equator, it is the vernal equinox (the date is around March 2 1 day) or the autumn equinox (the date is around September 23) in the northern hemisphere. At this time, the length of day and night in the world is: day and night are equal; When the sun shines directly on the Tropic of Cancer, it is the summer solstice in the northern hemisphere (the date is around June 22). At this time, the length of day and night in the northern hemisphere is as follows: the day is the longest and the night is the shortest; When the sun directly hits the tropic of Capricorn, it is the winter solstice in the northern hemisphere (the date is around 65438+February 22). At this time, the length of day and night in the northern hemisphere is: the shortest day and the longest night.

In June, July and August, it lies between the vernal equinox, summer solstice and autumn equinox. The direct point of the sun first moves from the equator to the tropic of cancer, and then from the tropic of cancer to the equator. The change of day and night length in the area north of the Tropic of Cancer (the main northern temperate zone in China) is that the day first becomes longer and then shorter; Because the solar altitude angle first increases (gains more heat) and then decreases (gains less heat), the temperature first increases and then decreases.

Therefore, choose: d.