I would like to know what the altitude and atmospheric pressure are in Hangzhou

The center of the map of Hangzhou is located at 39 degrees north latitude and 116 degrees east longitude

The west, north and northeast of Hangzhou are surrounded by mountains, and the southeast slopes gently towards the Bohai Sea. The altitude of the Hangzhou plain ranges from 20 to 60 meters, and the mountains generally range from 1,000 to 1,500 meters above sea level. Dongling Mountain at the border with Hebei has an altitude of 2,303 meters, making it the highest peak in Hangzhou.

Annual average air pressure

According to the records of the Hangzhou Meteorological Observatory from 1961 to 1980, the multi-year average air pressure in Hangzhou urban area is 1011.6 hPa, which is lower than the standard atmospheric pressure of 1013.25 hPa. The highest annual average pressure was 1016.5 hPa in 1953 and 1970, and the lowest average pressure was 1010.9 hPa in 1974. The maximum inter-annual mean air pressure difference is 5.6 hPa.

Monthly average air pressure. Throughout the year, the monthly average air pressure in Hangzhou urban area changes with the monthly average temperature. The lowest monthly average air pressure appears in July, which is 999.2 hPa, and the highest monthly average air pressure appears in December and January, which is 1021.6 hPa.

Extreme changes in air pressure. Affected by the cold high pressure (strong cold wave) in Siberia in winter, the air pressure reached a maximum value. On December 2, 1981, the urban Hangzhou was affected by the cold high pressure, and the air pressure rose sharply to 1038.2 hPa; at the turn of autumn and summer, affected by a strong typhoon, the air pressure A minimum value appeared. On the morning of August 2, 1956, the urban area of ​​Hangzhou was affected by a strong typhoon, and the air pressure dropped sharply to 958.7 hPa. These extreme values ​​were unprecedented in 40 years.