The Bureau of Meteorology (BoM) and the general public in Australia most commonly adhere to the meteorological calendar. This definition splits the year into four seasons of three full months each, based on annual temperature cycles.
The dates between April 1 and April 30 are pure alchemy. Days are mild (18–24°C in most capitals), nights are crisp but not cold, and the sun is gentle enough to sit in without sunscreen—almost. The autumn foliage peaks mid-to-late April in places like the Blue Mountains, Mount Macedon, and the Yarra Valley. Beech forests in Tasmania turn burnt orange; Canberra’s avenues become tunnels of liquid gold. autumn dates australia