Australia’s seasons are the antithesis for those in Europe and the USA. Summer starts in December (when the weather and longer daylight hours are perfect for swimming and other outdoor activities), autumn in March, winter in June and spring in September. The climate in New South Wales varies depending on the location, but the rule of thumb is that the further north you go the warmer and more humid it’ll be. It’s also hotter and drier the further west you go.
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Sydney is lovely for much of the year. The temperature rarely falls below 10°C except overnight in winter, and although temperatures can hit 40°C during summer, the average summer maximum is 25°C. The average monthly rainfall ranges from 75mm to 130mm. Much the same can be said for the climate on the coast, although the swimming season starts earlier by a month or more towards Byron Bay.
Canberra is cold in winter and scorching in summer, so spring and autumn are the best times to visit the Australian Capital Territory.
Inland, it gets hot soon after winter and just keeps getting hotter the further you get from the coast and highlands. The outback regularly stays above 40°C.
This temperature variation equates to varying high seasons throughout the state. Along the coast, summer and school and public holidays equals high season. During the Christmas period in particular you’ll find yourself competing with hordes of determined Aussie holidaymakers.
In the southeast snowfields, July to October encompasses high season. Similarly winter is the best (and high) season to visit the Back O’ Bourke.