Sydney is the largest city in Australia with a population of 22,000 in central Sydney and 4 million people in greater Sydney. The working population in central Sydney is around 10 times the residential population at 235,000. The CBD is quite small in comparison to other cosmopolitan cities occupying an area of less than 6.2 square kilometres, greater Sydney on the other hand, comprises over 600 suburbs and localities and occupies an area of 2,500 square kilometres.
Sydney is located 33 degrees 55' south of the equator sharing a similar latitude to Buenos Aires and Cape Town in the Southern Hemisphere, and Casablanca, Los Angeles and Beirut in the North. The city is located on the southern coast of New South Wales between the smaller coastal cities of Woolongong and Newcastle. The CBD is situated on the southern bank of Sydney Harbour, 10 kms west from the mouth of Port Jackson.
The temperature averages a warm 23 ° C (72° F) in summer and averages around 13° C (55° F) in winter. Sydney is bathed in sunshine for around 342 days of the year and has an average annual rainfall of approximately 1220 millimetres (48 inches).