Australia - weather in September

September is the first month of spring in Australia, and is a very hot month in the far north, hot during the day in the center (but with cool nights), and mild in the south, but with cold and windy periods. Rainfall is rare or very rare in the center-north, and more frequent in the south.

In the tropical north, September is a very hot and dry month in the Top End of the Northern Territory (see Darwin), and a little less hot on the north-east facing coast of northern Queensland (see Cairns).
On the east coast (see Brisbane, Sydney), it is a pleasantly warm month during the day, but with cool nights, and gradually cooler as you proceed south. We are in the driest period of the year, which goes from July to September.
In the Outback, the vast arid or desert inland area (see Alice Springs, Oodnadatta), the days are hot and the sun shines, while the nights are still cool. As generally happens in the tropical areas of the southern hemisphere, in spring the temperature already increases significantly, especially during the day.
In the south, in the areas where the climate is Mediterranean (see Perth, Adelaide), it is a very mild month, with rainfall gradually decreasing.
In the south-east, in the areas where the climate is oceanic (see Melbourne, Tasmania), the temperature is mild and the weather is variable, sometimes cold and windy, with quite frequent rain.

As regards to the temperatures, the daily average is 28 °C (82.5 °F) in the Top End of the Northern Territory (see Darwin) and 24 °C (75 °F) in northern Queensland (see Cairns), while it drops to 18 °C (64.5 °F) in Brisbane, on the east coast, and to 19/20 °C (66/68 °F) in the desert areas south of the Tropic (see Oodnadatta, Meekatharra), it is 15 °C (59 °F) in Perth and Sydney, while it drops to 12.5 °C (54.5 °F) in Melbourne, in the south-east, and to 11 °C (52 °F) in Hobart, Tasmania.
In the desert it can get very hot in fact the temperature can exceed 35 °C (95 °F).
Instead, in the south and in the central-southern inland areas, air masses of Antarctic origin can bring cold at night, with minimum temperatures close to 0 °C (32 °F), and below freezing in the capital, Canberra.

As for the rain, September is on average the driest month of the year in Australia. Rainfall is very rare in the Top End of the Northern Territory (see Darwin) and in the inland arid and desert areas (see Alice Springs, Oodnadatta).
On the east coast (see Brisbane, Sydney), which has a fairly rainy climate for most of the year, the rains are not very frequent, in fact, as mentioned, we are at the end of the driest period of the year.
In the vast arid areas of the Outback, rainfall is very rare.
In the south, in the areas where the climate is Mediterranean (see Perth, Adelaide), the rains are decreasing, however, they are still relatively abundant in the south-west, ie in Perth and in the area south of the city.
In the south-east, with an oceanic climate (see Melbourne, Tasmania), the rains are quite frequent, and in the western part of Tasmania they are also abundant.

In September, the sea in Australia is warm enough for swimming in the area north of the Tropic of Capricorn.




See also: Australia, the weather in August - October
The climate of Australia