The climate of nierji town.

nierji town is located in the inland, in the north of middle temperate zone, with a continental climate of middle temperate zone. Due to the latitude restriction and the alternating influence of high and low pressure and monsoon in inland ocean, the climate changes significantly in the four seasons. According to local specific conditions and actual agricultural production, April to May is generally designated as spring, June to August as summer, September to October as autumn, and November to March of the following year as winter. The climate characteristics of the four seasons are as follows: in spring, the temperature rises rapidly, the wind is strong, and there is little rain; Summer is warm and rainy, but short; In autumn, the temperature drops sharply and the frost is early; Winter is long, cold and windy. The average annual total solar radiation is 5284.4 MJ/m2, with the highest in May and the lowest in December. The photosynthetic effective radiation amount is 2695. MJ/m2, the effective radiation amount is 1216.68 MJ/m2 at the beginning and end of ≥1℃, the annual sunshine hours are 2728.4 hours, and the longest is 2997.5 hours (1967). The sunshine hours in the growing season are 1582.1 hours. Sunshine hours are the most in May and June, and the least in December. Although the sun shines for a long time after entering the midsummer season, due to the rainy season, the rainy weather increases, but the sunshine hours decrease, accounting for about 5 ~ 6% of the sunshine hours. Because nierji town is located in the south of Moqi, the total amount of solar radiation is more than that in the middle and north, and it is rich in light energy resources, which can fully meet the light energy needed for the growth and maturity of crops in one year, and is one of the favorable natural conditions for the development of agriculture and animal husbandry. The annual average temperature is 2.1℃, which varies greatly from year to year, and the highest year can reach 3.6℃(1995). The annual variation of temperature shows obvious periodicity, with the highest average temperature in July and the highest year reaching 23.8℃. The lowest in January, generally between-25.4℃ and 21.6℃. The extreme maximum temperature is 39.5℃ (July 22, 1968), the extreme minimum temperature is-4.4℃ (January 16, 198), the maximum and minimum temperature range is 79.9℃, and the frost-free period is generally 1 ~ 134.5 days. Precipitation varies greatly from year to year, with an average annual precipitation of 49.9 mm and the longest annual precipitation of 838.9 mm (1998). The precipitation in a year is the most in July, with an average of more than 1 mm, accounting for 23 ~ 35% of the annual precipitation; The annual average wind speed is 2.8m/s, the smallest in winter and the largest in spring, which can reach more than 5m/s, the maximum wind speed can reach 3m/s, and the average number of windy days is 8.5 days. During the day, the wind is strong during the day and weak at night. The wind direction is generally northwest or southwest, and northeast wind is more in summer. July-August is the wet period, September is the semi-wet period, April-May is the dry period, and June is between the latter two. The annual average relative humidity is 61-68%, with the minimum humidity in spring, which is 4-5% in April-May. 6 ~ 8% in summer; Although there is little precipitation in winter, the relative humidity can still reach 65 ~ 75% because of the small evaporation.