It rains every year during the college entrance examination, which is an interesting phenomenon that attracts a lot of people's attention. Although there is no scientific evidence that it will definitely rain during the college entrance examination, this phenomenon has indeed occurred many times and has been widely spread and recognized.

The college entrance examination is usually held at a certain time in June every year, which coincides with China's rainy season. The plum rain season refers to the rainy season between mid-June and mid-July every year. During this period, the humidity increases, the temperature drops, the air is unstable, and the tropical airflow and the temperate airflow interact to form strong frontal activity and convective cyclone activity. It can easily lead to widespread and sustained rainfall.

In meteorology, the cause of rain is mainly related to the condensation of water vapor. When water vapor encounters rapidly rising warm and moist airflow, it will quickly cool and condense into clouds and fog; when the clouds and fog continue to rise to higher places, they will further condense into raindrops, thus forming rainfall. Therefore, when the rainy season comes, airflow activities become very frequent and air humidity increases, which is conducive to the formation of clouds and fog and the occurrence of rainfall.

In addition, the plum rainy season is also a period of high incidence of heavy rains. Heavy rain refers to a process in which the precipitation reaches 50 mm or more in a short period of time (usually within 6 hours) and causes strong rainfall. Heavy rain weather is mainly affected by convective energy and water vapor content, and the rainy season is the period when these two factors are most abundant. Therefore, the reason why it rains every year in the college entrance examination may be related to such meteorological characteristics.

It should be pointed out that the probability of rain in the college entrance examination every year is not very high, and if it rains, the time and location are also random. However, since the college entrance examination is an event of great significance, it often attracts widespread attention and discussion in society, which also increases the impressiveness and spread of rain every year, thus forming an interesting phenomenon.

In short, the rain in the college entrance examination every year is an interesting phenomenon, and the reason may be related to factors such as the rainy season, convective energy, and water vapor content. However, for candidates taking the college entrance examination, the weather is not a factor they can control. What is important is to review carefully, be fully prepared, maintain a good attitude, and deal with it calmly.