In the tropical north, the "Wet Season" roughly corresponds to the southern Summer. The "Build Up" (a period of intense humidity before the rains break) often coincides with the start of the southern summer in November and December.
The sun in Australia is exceptionally harsh due to a thin ozone layer and clean air. The local safety campaign advises: on sun-protective clothing. when does summer start in australia
People often search for “when does summer start” expecting the solstice (Northern Hemisphere bias). But in Australia: In the tropical north, the "Wet Season" roughly