Weather
December is Summer in Australia and the temperature can be quite hot in Perth, WA.
The historical average temperature for the first week of December is a maximum of ~28 degrees C (82 degrees F) and an overnight minimum of ~14 degrees C (57 degrees F).
The type of heat is dry (not humid) and attendees are encouraged to be sun-smart (wearing a hat and sunscreen during travel to and from the venue).
More information on Perth Weather can be found here: Perth Weather Forecast