Asunción is located between the parallels 25º 15′ and 25º 20′ of south latitude and between the meridians 57º 40′ and 57º 30′ of west longitude. The city sits on the left bank of the Paraguay River, almost at the confluence of this river with the River Pilcomayo. The Paraguay River and the Bay of Asunción separates the city in the north-west from the Occidental Region of Paraguay and Argentina in the south part of the city. The rest of the city is surrounded by the Central Department.
Since the location is right next to the Paraguay River the city offers beautiful landscapes and spreads out on gentle hills in a pattern of rectangular blocks. Places like Cerro Lambaré (a hill) located in Lambaré offer a spectacular show in the spring because of the lapacho trees in the area. Parks like Parque Independencia and Parque Carlos Antonio López offer big areas of typical Paraguayan nature and are often frequented by tourists. There are several slightly elevated areas throughout the city (small hills) such as Cabará, Clavel, Tarumá, Cachinga, Tacumbú, among others.
The climate of Asunción can be described as warm and humid for most of the year. The average temperature of the city is 24.0 °C (75.2 °F). The average maximum is 29.4 °C (84.9 °F) and the average minimum is 19.2 °C (66.6 °F). In 2002, the registered level of rain was 1,420 millimeters. Usually, October is the month with the most precipitation, while September is the month with the least.
Because the Paraguay River runs right next to Asunción the city is served by a river terminal in the downtown area and in the Sajonia neighbourhood. The ‘terminal fluvial’ is almost opposite the Argentine city of Clorinda. Public transportation is used heavily and is served through buses that reach all the regions of the city. The main long-distance bus terminal is on the Avenida Republica Argentina and its bus services connect all of the Departments of Paraguay, as well as international routes to nearby countries such as Argentina, Brazil, Bolivia and Uruguay. Asunción is served by the Silvio Pettirossi International Airport located in the city of Luque.