What's the climate and air quality in Lanzhou?

Lanzhou is surrounded by mountains in the north and south, and the Yellow River in the east and west passes through the city. It has the characteristics of a banded basin city, located in the upper reaches of the Yellow River, and has a temperate continental climate. The annual average temperature is 65438 00.3℃. There is no heat in summer and no cold in winter. This is a famous summer resort. The annual average sunshine hours are 2446 hours, the frost-free period is 180 days, and the annual average precipitation is 327mm, mainly from June to September.

The air quality of Lanzhou, the capital of Gansu Province, has been ranked among the top ten polluted cities in China for many years. Since 20 14, the ultimate revenge has been used to control smog and achieved remarkable results. As of June 5438+ 10, the weather with excellent air quality has reached 290 days, accounting for 80% of the total days of the year, and it is a city with air quality standards. Recently, many places in central and eastern China have been shrouded in smog, and the air quality in Lanzhou is "the only good scenery here".