Liaocheng meteorological conditions

Temperature Liaocheng annual average temperature 13. 1℃, Linqing lowest 12.9℃, Dong 'e highest 13.4℃. In the change of geographical location, the temperature gradually rises from northwest to southeast. The seasonal variation of temperature is obvious, and the winter temperature is the lowest. The average temperature of 65438+ 10 is -2.5℃, which is the coldest month in the whole year. The highest temperature is in summer, and the average temperature in July is 26.7℃, which is the hottest month in the whole year. Annual variation characteristics of temperature: the temperature rises rapidly in spring, drops rapidly in autumn, and it is prone to continuous high temperature weather in summer. In spring, the monthly average temperature rose by 7.5℃ in March and April, and in autumn, the monthly average temperature dropped by 8.0℃ from 10 to1. The average extreme maximum temperature in the city is 4 1. 1℃, and the highest observed temperature is 4 1.6℃ (Yanggu and Shenxian). The average extreme minimum temperature in the city is -2 1.4℃, and the lowest observed temperature is -22.7℃ (Shenxian, 197 1). (See attached table for perennial data. ) This article comes from the precipitation of www.Lc365.net, the gateway of Liaocheng. The average annual precipitation in Liaocheng is 578.4mm, which is unevenly distributed in time and space. Among them, the winter precipitation is the least, which is 17.9mm, accounting for 3.1%of the annual precipitation; The summer precipitation is the highest, which is 37 1.8mm, accounting for 64.3% of the annual precipitation; The precipitation in spring and autumn accounts for 32.6% of the annual precipitation. Judging from the combination of precipitation and temperature change, it belongs to the same season of rain and heat. There is little difference in precipitation between county and urban areas. The average annual precipitation is the highest in East Afghanistan, which is 6 14.3mm, and the lowest in Linqing, which is 557.1mm. The annual precipitation in the whole city varies greatly from year to year. In wet years, the maximum annual precipitation is as high as 1004.7mm (chiping, 196 1) and the minimum annual precipitation is 187.2mm (Linqing, 1992). The maximum daily precipitation is 328.7mm (Dongchangfu District, 1985.7.24). The city has plenty of solar radiation and sunshine. The annual total solar radiation is120.1-127.1kcal/cm2, and the effective radiation is 58.9-62.3 kcal/cm2, which is in the middle and high value area in the whole province. Solar radiation is the most in summer, followed by spring, obviously weakened in autumn and the smallest in winter. The average annual sunshine hours in the city are 2567 hours. The maximum sunshine hours in May is 274 hours, and the minimum sunshine hours in June is 170 hours. There is a slight difference between counties and urban areas, with more in chiping and Gaotang in the northeast and less in Shenxian and Yanggu in the southwest. Humidity and Evaporation The annual average relative humidity in Liaocheng is 67%, with the highest relative humidity of 80-82% in July and August, the lowest relative humidity of 58-60% in March and May in spring, and 60-80% in other months. The difference of relative humidity in different parts of the city is small. The annual average relative humidity is between 65% and 69%, which is a relatively stable meteorological factor. The annual average evaporation of the whole city is1.882mm, with the maximum value of1.994mm (chiping) and the minimum value of1.688mm (sunshine valley). In all the years, the evaporation in June is the largest, with an average of 344mm, and the evaporation in 65438+1October is the smallest, with an annual average wind speed of 3.4 m/s in Liao Feng. The monthly average wind speed changes with the seasons as follows: the wind speed in spring is larger, and the monthly average wind speed in April is the largest, with 4.5 m/s; The wind speed in summer is relatively small, and the average monthly wind speed in August is 2.5 m/s, but there will also be short-term strong winds when there is strong convective weather in the local area. The geographical variation of average wind speed is larger in the north and smaller in the south. The most common wind directions in the whole year are southerly winds and southerly winds, with a frequency of 44%, and the highest frequency is in spring; Followed by the north wind and northerly wind, the frequency of occurrence is 30%, and the frequency of occurrence is higher in winter; The frequency of easterly winds and westerly winds is low throughout the year.

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