The graph and table below show the average monthly temperatures and the average number of hours of sunshine per year in three major cities

The monthly temperatures in London and New York experienced dramatically rise in the beginning, while Sydney started the period decreasing, and all of them have a little fluctuating.
It is clear that in January, London and New York were nearby 8 degree and 4 degree respectively. London's rate considerably rised until July almost 23 degree, however after the period it witnessed noticeably decline until at the end of the period 10 degree. New York witnessed the period 4 degree, and after that it moderately growing until July and it was nearby 29 degree, and this period finished with dropping until December it was 5 degree. Sydney encountered almost 25 degree in January, and continued levle off untill March. However it saw noticeably decline nearby 16 degree up to July, and then it experienced dramatically rise until end of the period 25 degree.