Why is the temperature high in Beijing and Guangzhou?

The temperature is mainly determined by geographical location and terrain environment, and the geographical location and terrain of Beijing and Guangzhou determine the temperature. Details are as follows:

Beijing is located in the northern part of North China Plain, backed by Yanshan Mountains, and adjacent to Tianjin and Hebei Province. Beijing's climate is a typical semi-humid continental monsoon climate in the north temperate zone, with high temperature and rainy summer, cold and dry winter and short spring and autumn. The frost-free period of the whole year is 180 ~ 200 days, which is shorter in the western mountainous area. In 2007, the average rainfall was 483.9 mm, which is one of the most rainy areas in North China. The seasonal distribution of precipitation is very uneven. 80% of the annual precipitation is concentrated in June, July and August in summer, and there are heavy rains in July and August.

The annual average solar radiation in Beijing is 1 12 ~ 136 kcal/cm. The two high-value areas are distributed in Yanqing basin and the northwest of Miyun county to the east of Huairou, with annual radiation above 135 kcal/cm. The low-value area is located near Xiayunling in Fangshan District, and the annual radiation is 1 12 kcal/cm. The average annual sunshine hours in Beijing are between 2000 and 2800 hours.

Guangzhou is located in the subtropical coast, and the Tropic of Cancer passes through the south-central, belonging to the maritime subtropical monsoon climate, which is characterized by warm and rainy, sufficient light and heat, long summer and short frost period. With an average annual temperature of 20-22 degrees Celsius, it is one of the smallest cities in China. The hottest month in a year is July, with an average monthly temperature of 28.7℃. The highest temperature in Leng Yue is 65438+ 10 month, and the monthly average temperature is 9 ~ 16℃. The average relative humidity is 77%, and the annual rainfall in urban areas is about 1720mm. April-June is the rainy season, and there are many typhoons in July-September. The temperature is moderate in June 5438+ 10, June 5438+10, March, and it is cool in June 5438+February to February. The same period of water and heat throughout the year, abundant rainfall, is conducive to plant growth. It is a "Flower City" with evergreen seasons and numerous flowers.