In general, the Australian Bureau of Meteorology defines spring as the period from September 1 to November 30, and autumn as the period from March 1 to May 31. The average maximum temperatures for these periods are:
* Spring: 21.7°C (71°F)
* Autumn: 20.7°C (69°F)
So, on average, spring is about 1°C (2°F) warmer than autumn in Australia.
However, it's important to note that these are just averages, and the actual temperatures can vary significantly from year to year. For example, in some years, spring may be much warmer than autumn, while in other years, the difference may be smaller or even reversed.
Additionally, the temperatures can also vary significantly between different regions of Australia. For example, the northern parts of Australia tend to be warmer than the southern parts, and the coastal regions tend to be warmer than the inland regions.
So, while spring is generally warmer than autumn in Australia, the exact temperatures can vary depending on the region and the specific year.