Data confidence level:
This FACT indicates the amount of rainfall in each Australian capital city during the winter of 2015. In wintertime, the regions that are usually very dry for the remainder of the year, experience heavier rainfall than usual. From June to August, Sydney, Perth and Adelaide (the southernmost cities with the exception of Hobart), which are the driest in summer, are the wettest in winter due to the southern cold troughs bringing a cool change and rain. All of the tropical cities experience less rainfall in this season due to the El Nino weather system that instigates a cool water change, as the winds bring the warm water to the other side of the Pacific.