Where do you think the four seasons are most distinct in our country? Tell us your reasons.

The climate of Harbin is characterized by four distinct seasons, with long and cold winter, short and hot summer, and spring and autumn temperatures

which rise and fall rapidly and are transitional seasons with short duration. Affected by the geographical environment, the alternation of sea and land air masses and monsoons, the city's climate varies significantly among seasons. In winter, the climate is cold and dry under the control of polar continental air masses; in summer, influenced by

subtropical ocean air masses, precipitation is abundant and the climate is warm; in spring and autumn, due to the alternating influence of winter and summer monsoons, the climate

Variable, with strong winds, low precipitation, and prone to drought in spring; severe cooling in autumn, often with frost hazards.

Spring climate

Spring (March-May) is the transition season between winter and summer. The temperature rises quickly, there is less precipitation, there are many strong winds, the air is dry, and the weather is changeable.

The temperature changes greatly. Temperature changes strongly from month to month, generally around 8 to 10°C. The city's annual average spring temperature is 5.1°C.

The low temperature centers are in Shangzhi, Yanshou and Tonghe, with the average spring temperature over the years being below 4.4℃; the high temperature centers are around Shuangcheng, Acheng and Bin County, with the average spring temperature over the years being above 5.6℃. The city's spring precipitation averages 80.2 mm over the years, with 39.0 mm in wet years (1989) and 127.9 mm in wet years (1976). There is more spring precipitation in the south and east, which are prone to spring floods; there is less precipitation in the west, which is prone to spring drought. The wind speed is the highest in spring, with the maximum wind speed ranging from 22 to 37 meters/second from April to May. The maximum wind speed in the past years is 37 meters/second (Acheng on May 3, 1974); the average number of windy days is 25 , the maximum number of windy days in Yilan is 63

days. The last frost varies greatly among counties in the city, with the average last frost over the years being May 10th; Shuangcheng, Acheng and Binxian are on May 5th; Wuchang, Fangzheng and Yilan are in early to late May; Bayan, Mulan, Tonghe and Yanshou are in mid-May; only Shangzhi is in late May or early May.

The final frost varies greatly from year to year, and can sometimes be about 10 days earlier or later than normal. The delay in the final frost will cause late frost, which is also a major disaster for agricultural production.

Summer climate

The climate in summer (June-August) is warm, with abundant rainfall and sunlight and hot water in the same season, which is conducive to agricultural production. The city's annual average summer temperature

is 20.8℃, varying between 19.4-22.4℃; the lowest value of 19.4℃ occurred in 1983, and the highest value of 22.4℃ occurred in 1994

. Although the change in average summer temperature is very small, with a difference of only 3°C, it has a great impact on agriculture. In summer

The temperature is also higher in the west and lower in the east. July is the month with the highest temperature in the whole year. The city's average temperature over the years is 22.3℃; among them, Shangzhi

, Yanshou, Tonghe and Yilan are less than 22℃. The monthly difference in temperature is very small, generally only 2-3℃, which is the smallest in each season. Summer precipitation

The city's average annual precipitation is 379 mm; the annual variation ranges from 197.5 to 633.7 mm, with a difference of more than 2 times. Season

Shangzhi, Wuchang and Bayan have annual average precipitation greater than 400 mm. The intensity of precipitation is not great, with an average of 1 to 2 rainstorm days

and extremely heavy rainstorms are rare. Generally, heavy rains mostly occur in the eastern mountainous and hilly areas, which can easily cause flash floods or waterlogging.

Autumn climate

Autumn (September to October) is the transition season from summer to winter. Due to the influence of cold air from the north, the climate changes from warm to cold. Cyclone activity

Second only to spring, the weather is changeable. Whenever a cold front passes, the temperature drops sharply. The temperature varies from month to month by 8 to 9℃

. The city's annual seasonal average temperature is 9.4°C; the inter-annual variation range is between 7.9 and 11.1°C, with little change. The first frost in the city is on September 23 on average every year; the earliest occurrence is September 7 (Shang Zhi and Yanshou 1976). Since frost is greatly affected by terrain,

the first frost dates differ between plains and mountainous areas. After autumn, precipitation decreases significantly, but is more than in spring. The city's average precipitation over the years is 94.3 mm; the inter-annual variation ranges from 46.2 to 167.1 mm; the precipitation in Shangzhi, Yanshou, Fangzheng and Tonghe in the eastern mountainous areas is greater than 100 mm. The wind speed is higher in autumn, second only to spring, and the wind direction is mainly southerly.

Winter climate

In winter (November to February of the following year), controlled by the dry and cold polar continental air masses, the temperature is very low, precipitation is very little, and the climate is cold and dry

< p>Dry. The average temperature in winter is -14.2℃. January is the coldest month, with the city’s annual average temperature being -19.6°C. The city's average precipitation (snow) in winter is 23.6 mm over the years; the inter-annual variation ranges from 6.6 to 35.4 mm, a difference of nearly 5 times. In winter

The southwesterly wind prevails in the city and the wind speed is very small. Blizzard weather sometimes occurs.