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延庆县地处首都西北,是北京的一个远郊县,该县在气候条件上与本市其它区县比较,在八九月淡季蔬菜生产方面具有较好的自然优势,主要表现在延庆地区海拔高。山区一般五百米左右,气温较近郊偏低,年平均气温为8.5℃,冬季气温最低(一月份)平均为-8.8℃,夏季最高气温(七月份)平均为
Yanqing County, located in the northwestern capital of the country, is an outlying county in Beijing. Compared with other districts and counties in the city, the county has better natural advantages in terms of vegetable production in August and September, mainly in the elevation of Yanqing area . The mountainous area is generally about 500 meters in height, with a relatively low temperature, with an average annual temperature of 8.5 ° C. The lowest temperature in January (January) is -8.8 ° C on average, and the highest in summer (July) is