Climatic characteristics of Qingdao in winter

Characteristics of urban climate in Qingdao

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1, temperature

Although there is no intense heat in Qingdao, it is very cold in winter, and the annual average temperature in Qingdao is 12.3℃, which is quite suitable. The coldest month in a year is 65438+ 10, with an average temperature of -0.9℃. August is the hottest, with an average temperature of 25.3℃. The extreme minimum temperature in the last century was-193 1 year 1 month 1 day, and the extreme maximum temperature appeared on July 15, 2002, and the maximum temperature reached 38.9℃. The daily temperature difference in Qingdao is very small. Characterized by a maritime climate.

Step 2 precipitate

The average annual rainfall in Qingdao is 680.5mm, the annual rainfall is concentrated in July and August, and the average rainfall in February is 303. 1mm, accounting for 45% of the total annual rainfall. The average rainfall in the whole winter is 34mm, and the rainfall in 65438+February is the least, only 9.8 mm In the past hundred years, there have been two years (19 1 1 and 1926) with extremely heavy rainfall, with the former being 1272.7mm and the latter being. 1899 and 1920 have the least rainfall, both below 400mm, which is only half of the annual rainfall. Drought and flood years in Qingdao are rare, but the rainfall in each season is obviously uneven in time and space. Or the lack of spring rain affects the wheat harvest, or the summer rainstorm causes flash floods.

The rainfall in 1899 is less than 25mm in the whole spring, while in 1926, there are frequent rainstorms in July and August, and the rainfall in two months is 78 1.3mm, which exceeds the annual average rainfall, which is an obvious example of less spring rain and more summer rain.

The rainstorm in Qingdao is rare. On September 1928+07, the daily rainfall of typhoon rainstorm was 225.4mm, and the maximum rainfall 1 hour reached 60.6mm, all of which set a record.

Even rainy weather is extremely rare in Qingdao. On July 19 10-23, 2007, it rained continuously for 14 days, which is the longest continuous rainy period in a hundred years.

3. Pressure and wind

Qingdao has a maritime monsoon climate, which is influenced by the cold high from Siberia in winter and controlled by the western Pacific subtropical high in summer. They are semi-permanent heights with different properties. Since mid-March, due to the cold and high pressure staying at sea, the city has maintained a stable southeast flow field, mainly southeast wind. Since autumn, the polar cold air has been active, and the northbound wind is dominant again.

Affected by the terrain, there are two kinds of winds in southeast and northwest all the year round in our city. The annual average wind speed is 4.9m/s, and the monthly average wind speed is 5.6m/s in March and 4. 1m/s in September. The strongest average wind speed in the last century 1923,165438+1October 24th, the west wind in the northwest was 32.4m/s, and the instantaneous maximum wind speed was pushed to the east wind in the northeast first 1939. The former was affected by the cold wave, and the latter was a typhoon.