What are the characteristics of subtropical climate?

Features: warm winters and hot summers, distinct four seasons, abundant precipitation, and relatively even seasonal distribution.

There are two types of subtropical climate:

The east coast of the continent has a subtropical monsoon climate: high temperatures and rainy summers, and mild and drier winters;

The west coast of the continent has a Mediterranean climate: summers Hot and dry, with mild and rainy winters.

The subtropical region is rich in heat resources. The annual average temperature is between 13℃~20℃, and the accumulated temperature of ≥10℃ is 4000℃~6500℃. The average temperature in January is above 0℃, 0℃~2℃ north of the Yangtze River, 2℃~10℃ south of the Yangtze River, and 10℃~12℃ in the Nanling area.

Due to the low temperatures in winter, the latitude of China's subtropical zone is more southerly, and its northern limit is 4 to 5 latitudes southward than the theoretical limit. Compared with the Mediterranean area, it is 10 to 11 latitudes south.

However, China’s subtropical zone, especially in Central China, generally experiences high temperatures in summer. The average temperature in July reaches around 28°C, and in some areas exceeds 29°C. From May to September, extremely hot weather with temperatures above 35°C often occurs.

Extended information:

The average annual precipitation in this region is generally between 800 mm and 1600 mm, which is 1 to 2 times more than in North China and richer than in Southwest China. Precipitation distribution decreases from southeast to northwest. The annual precipitation in the hills of Zhejiang ranges from 1200 mm to 1800 mm, in the Nanling Mountains and Jiangnan hills around 1500 mm, and in the plains of the middle and lower reaches of the Yangtze River from 1000 mm to 1200 mm.

Topography also has a significant impact on precipitation. Generally, there are more mountainous areas than flat areas, and more windward slopes than leeward slopes. For example, Tunxi and Huangshan in Anhui are very close to each other, but the precipitation in Huangshan is 700 mm more than that in Tunxi (1507.8 mm in Tunxi and 2263.9 mm in Huangshan). The annual precipitation in Luoxiao Mountain and Xuefeng Mountain can exceed 1800 mm.

Summer rains are the most common, followed by spring rains, autumn rains, and winter rains are the least. However, winter rains can also account for more than 10% of the annual precipitation. The middle and lower reaches of the Yangtze River are areas with the highest winter rain ratio and the most abundant spring rain in the country. This characteristic of seasonal distribution of precipitation is closely related to the geographical location of the middle and lower reaches of the Yangtze River and the atmospheric circulation process.

Baidu Encyclopedia - Subtropical Climate