January 2020 has entered the 29th day, why is it raining and thundering?

In winter, due to the cold and dry air and weak solar radiation, convection is not easy to form in the air, so thunder and lightning are rare. But sometimes the temperature is high in winter, the warm and humid air is stronger, when the north occasionally has a strong cold air to the south, the warm and humid air is forced to rise, and the convection intensifies, it forms thunderstorm clouds, produces thunder and lightning, and there is rain and snow weather, the convection is particularly strong, and hail can also be formed, which will produce the so-called "winter thunder" weather phenomenon.

Ever since I was a child (referring to the late 70s and early 80s), I heard an old man tell a proverb about farming"Nine days of thunder and 100 days of cloud"。It means that if there is thunder for nine days in winter, it will be rainy for a long time.

On January 7, 2020, at 2:12 a.m., thunder was heard!

Just look at this year's new crown, there is an old saying: thunder in winter, piles of human bones.

We all know that there will be different weather phenomena in different months of the year, and with the end of the dog days in July and August, the summer heat weather is also coming to an end, and people are starting to enter autumn, and the weather will slowly get cooler. So will it rain in September 2020? Let's take a closer look!

Autumn is crisp and the chance of rain is high, and the chance of heavy rain is very small. Weather conditions vary from region to region, with some places likely to rain more and others less depending on the weather conditions in each region.

Autumn is the best of the four seasons. The sun is shining, the sun is shining, the sky is as blue as the sea, the clouds are white and seren, and the breeze is gentle and soothing, and the breeze brings the fragrance of flowers and fruits in the garden.

During the Bailu period, the cold air brought by the Mongolian high pressure had a certain intensity. In general, the strength is not very strong. It mainly affects the northern part of China and the middle and lower reaches of the Yangtze River.

The north is under its control, with reduced precipitation, light clouds, light winds, and temperatures that are neither hot nor cold. This is the ** season for climbing and looking far away in autumn.

1. Large temperature difference.

In September, the sun turns to a yellow longitude position of 165 degrees, and the daylight begins to decrease and the intensity of ultraviolet rays decreases. After being affected by the cold air, the temperature at night drops rapidly, and the gap between the maximum and minimum temperatures gradually widens and begins to appear. The temperature difference between day and night is obvious.

2. It's getting colder and colder.

After September, the sun no longer shines directly on the ground, and the winter monsoon comes to our country instead of the summer monsoon. The cold air began to rage and the warm air retreated. As the cold air blows south, the weather gets colder and colder. This is the weather change of the Hakuro solar term.

Shortly after the beginning of autumn in September, so there is a large daily temperature difference, t-shirts, shorts, skirts, morning and evening coats, light-colored clothes at noon; Short sleeves, trousers, skirts, light jackets, dark or light warm colors are preferred; At the end of September, you need to add a coat, long sleeves and pants. If you are a girl, keep warm, boys should make an effort to learn color matching.

The climate changes until September.

For example, the average temperature in Beijing in September is 15 -26 and the average daytime temperature is 26. It is recommended to wear cotton shirts, light t-shirts and other clothing. The average nighttime temperature is 15. It is recommended to wear warm clothing such as suits, windbreakers, jackets, and light sweaters.

As in the northern regions, the weather doesn't drop so quickly, and it's usually around mid-October when long-sleeved clothes are worn. In the south, it's around mid-November. However, it also depends on the physical fitness of the individual.

In short, the most beautiful season is autumn, blue skies, September to October, wear short sleeves, three-quarter sleeves, long shirts, jackets, sweaters, etc.