The geographical environment of Chicago

Chicago is located in Cook County, Illinois, USA, on the southwest bank of Lake Michigan, one of the Great Lakes in the United States. Traditionally, it is divided into three parts: north, west and south, with a length of 40.23km from north to south and a width of 24. 14km from east to west. According to the data of the US Bureau of Investigation, the total area of Chicago is 606. 1㎞? , of which 588.3㎞? Land, 17.8 "? For water. The water area accounts for about 2.94% of the total area.

Chicago is located in the northeast corner of Illinois with geographical coordinates (4153 ′ n, 87 39 ′). Chicago lies on the dividing line between the Mississippi River system and the Great Lakes system. There are two rivers in the territory, the Chicago River runs through the city center and the Kalume River runs through the industrial zone in the south of the city. Both rivers initially flowed into Lake Michigan. At the beginning of the 20th century, in order to prevent the urban sewage from polluting Lake Michigan, the direction of the Chicago River was reversed, and it flowed southward into the Mississippi River system through the canal.

The terrain near Chicago is quite flat, with an average elevation of 176 meters. The lowest elevation of the lakeshore is176m, and the highest elevation of the southern suburb landfill is 224m (4139 ′18 ″ n, 87 34 ′ 44 ″ w).

The climate in Chicago is different all year round. In the hottest July of the year, the average maximum temperature is 29℃, and the average minimum temperature is17℃; ; The coldest 1 month, the average maximum temperature is 2℃, the average minimum temperature is-1 1℃, the historical maximum temperature is 40℃ (1July 24th, 934), and the minimum temperature is -32℃( 1985/kl).

Influenced by Lake Michigan, it is windy in winter in Chicago. The temperature in Chicago is suitable. The average temperature in June 65438+ 10 is 6℃, in April 9℃, in July 22.8℃, and in June 65438+ 10/1.4℃.

There is plenty of rain in Chicago, with an average annual precipitation of 965mm. Summer is the season with the most precipitation, usually in the form of thunderstorms or showers, and there is little continuous precipitation. In winter, the precipitation is the least, usually in the form of snow. The maximum daily precipitation is165438+ 164 mm recorded on August 4, 987.

"windy city"

Visitors to Chicago had better take more clothes to adapt to the climate here. If January happens to encounter a biting cold wind from Lake Michigan in Ma Lukou, you can appreciate the weight of this nickname. Wind is not the only climate feature in Chicago, and its temperature difference is also well known. It is recorded that the temperature in winter will be lower than MINUS 30 degrees Celsius and the temperature in summer will be higher than 40 degrees Celsius. If you happen to encounter particularly warm weather when you come to Chicago in winter, don't mistake it for a spring-like winter in Chicago. The weather here is changeable. You often see bulletin board system on the road. It shows the time above and the temperature below, which changes every minute. I'm afraid it has something to do with this unpredictable weather.