Beijing is at 39.4°-41.6° N latitude.
Beijing is located at longitude 115.7°-117.4°E, latitude 39.4°-41.6°N, and centered at latitude 39°54′20″N, longitude 116°25′29″E, with a total area of 16,410.54 square kilometers. It is located in the northern part of the North China Plain, adjacent to the Bohai Bay, up against the Liaodong Peninsula and down against the Shandong Peninsula.
Beijing is adjacent to Tianjin and, together with Tianjin, is surrounded by Hebei Province.
Beijing's climate is a typical semi-humid continental monsoon climate of the northern temperate zone, with hot and rainy summers, cold and dry winters, and short springs and autumns. The annual frost-free period is 180 to 200 days, with shorter periods in the western mountainous regions. 2007 saw an average rainfall of 483.9 millimeters, one of the highest in North China. The seasonal distribution of precipitation is very uneven, 80% of the annual precipitation is concentrated in the summer months of June, July and August, with heavy rainfall in July and August.
Expanded Information:
Beijing's mountainous areas cover 10,200 square kilometers, or about 62% of the total area, and the plains cover 6,200 square kilometers, or about 38% of the total area. Beijing's topography is high in the northwest and low in the southeast. The average elevation of Beijing is 43.5 meters above sea level. The elevation of Beijing's plains ranges from 20 to 60 meters above sea level, while the mountains are generally 1,000 to 1,500 meters above sea level.
The western part of Beijing is the Xishan Mountains, which are part of the Taihang Mountains; the northern and northeastern part is the Jundu Mountains, which are part of the Yanshan Mountains. The highest peak is Dongling Mountain in Mentougou District in the west of Beijing, with an elevation of 2,303 meters. The lowest ground is the southeastern border of Tongzhou District.
The two mountains intersect in the Nankouguan ditch, forming a semicircular southeastward unfolding of the mountain bend, people call it "Beijing Bend", which is surrounded by a small plain that is the Beijing small plains. As the ancients said: "Youzhou land, left around the Canghai, right embraced the Taihang, the north pillow Juyong, the south lapel Heji, sincere heavenly capital of the country".
Reference:
Baidu Encyclopedia-Beijing