Annual precipitation in Beijing

The annual precipitation in Beijing reaches 698.4 mm.

According to the statistics of Beijing Meteorological Observatory, from June 1 flood season to 8: 00 on August 22nd this year, the accumulated precipitation in the whole city reached 392.2 mm, which was more than 355.7 mm 1% and 30% less than 597.6 mm in the same period last year. From 65438+1 October1to 8: 00 on August 22nd this year, the accumulated precipitation in the whole city was 44 1.5mm, which was similar to that of 431.

The rainstorm centers in Beijing are distributed in the piedmont windward zone of Yanshan and Xishan Mountains, and the annual precipitation is mostly 650 mm ~ 700 mm, among which jujube trees and Shuiman River are the places where heavy rainstorms occur. Thus gradually reduced to about 500 mm in front of the mountain and behind the mountain.

Climatic characteristics of Beijing

Beijing is located on the channel where the dry and cold air mass in the mainland moves to the southeast. From June to May of the following year, it was almost completely controlled by the dry and cold air mass from Siberia, and it was only affected by the warm and humid air mass from June to September for more than three months. So precipitation is mainly concentrated in summer, especially in July and August. Due to the influence of warm and humid air mass and dry and cold air mass, the annual precipitation changes greatly, and the rainfall in wet year and dry year is very different.

The special terrain of "Beijing Bay" makes the mountain and valley wind in Beijing obvious. The plain area is south in the afternoon and turns north at midnight. Nankou, Gubeikou and other places, along the ravine, form a tuyere whose wind speed is obviously greater than the surrounding area. Beijing has four distinct seasons, winter is the longest, followed by summer, and spring and autumn are short.