Philadelphia is located in southeastern Pennsylvania, USA. It is the fourth largest city in the United States and the largest city in Pennsylvania. Located at the intersection of the Delaware River and the Skulkir River, it is 42km from the eastern Atlantic Ocean/kloc-0. The total area is 9202 square kilometers. Historic city, built in 168 1. From 1790 to 1800, this city is the capital of the United States. The downtown area is centered on this square, which is located in the middle of the river. The city hall tower standing in the square is the commanding height of the city. Climate Philadelphia is located in the northern edge of subtropical humid climate, with four distinct seasons. It is cold in winter, with the average temperature of 0.2℃ in June 5438+ 10, but the temperature sometimes drops to 10℃. The average snowfall is 49 cm, but the snowfall varies greatly. Summer is sultry. The average temperature in July is 25.3℃, and the highest temperature can sometimes reach 35℃. Thunderstorms are common. The annual precipitation is about 1070mm, which is also evenly distributed. The extreme high temperature was 4 1℃, which occurred on August 7, 2008 1965438. The extreme low temperature is -24℃, which appeared on February 9 1934. It reaches 32℃ for 26 days every year.