Seasons in China

Lots people from the whole world think China has with a year-round hot climate. However, China is a huge country with ranging climatic conditions. This country combines a diversity of climatic zones. Zhongguo is the most common informal name for China. The term is translated as "Middle Kingdom" what deeply reflects its substance. There are nearly all the existing climates. It is almost impossible to choose the season which would provide you with good weather conditions over the territory of China.
It should be said, sometimes in the spring and autumn months the weather is really hot, although typhoons frequently hits China. Among other things, China has a bright local color. 
Chinese people follow all the customs, keep them up. Chinese are considered to be great workers and yet they widely celebrate holidays. This is why China is so popular with foreign tourists - it is an amazing place to know ancient traditions of the East. 
Seasons:
•    Spring
•    Summer
•    Autumn
•    Winter

Spring 

If you decide to visit this country - spring is the best time for the trip. Temperatures are warming up, but not yet so hot. March is a glorious time, the Cherry Blossom festival in full bloom. But remember the country's size - an average air temperature in different parts of China may be various. In April the temperature warms up.

Southern and Southeastern China
Rainy Season (May to September)
Sometimes the weather becomes hot.

Summer in China

Summer in China is a warm season but several regions usually suffer from the heat. June and July are the hottest months, especially in cities. In August the temperature drops. The biggest disadvantage of this time is a great amount of typhoons and summer rains.
Summer is also full of holidays.
The season begins with the celebrating of Children's Day (June 1st). After that follow very unusual forus holidays: Duanwu Festival or Festival of Dragon Boat, one of the most respected holiday, Father's Day. In August Chinese celebrate Valentine's Day.
In Chinese language it is called Qixi Festival. It is a romantic, tender holiday. Its celebration usually falls on the end of August. On this day girls are used to pray for wisdom, some competitions between girls are held. This festival is a special value to newly-married pairs. Also in summer they celebrate Festival of Ghost. Being a well-knit nation, all Chinese people participate in national celebration.
Autumn in China

In autumn there is plenty of sunshine, temperatures are cooler. The average temperature is around +13 +25 °C (55-77 °F), depending on the region.
Southern and Southeastern China
Dry Season (October to April)
In November the weather becomes colder, in winter there might be freezing.

Autumn holidays start with celebrating Teachers' Day (10th September). However, some Chinese eager to change it to 28 September, believed tobe the birthdate of Confucius, their respectful teacher.
The most important festival for Chinese people is National Day of the Republic of China.
It is usually celebrated on October 1st. Another autumn celebration is Festival of Mid-Autumn, also known as Moon Festival.
Winter in China

In the north of China the climate is very harsh. Winters which last from December to March are cold. The temperature may fell to -20 °C (-4 °F). Itgives an opportunity to see sand dunes of deserts, graced with snow. In the middle part of China winters are shorter but bleak and harsh as in the north. In the south winters are much shorter (about 2 month) and much warmer.

Nowadays Chinese use the official chronology but at the same time they respect the Lunar Calandar and use it in many cases. Numerous festivals are celebrated accoding to the lunar calendar. For example,
Chinese New Year is widely celebrated in Febrary (between January 21 and February 21), while usual New Year (which the whole world celebrate on 1st Janury) is deprived of attention. Another facsinating and colourful festival, celebrated accoding to the Lunar Caledar, is The Lantern Festival.
The customs which Chinese keep up are guessing lantern riddles and lion dances. Also, in winter Chinese celebrate such holiday as Dongzhi Festival.
https://seasonsyear.com/China#content-1