December 2024 Weather. It features all historical weather data series we have available, including the. In general, the average temperature in sydney at the beginning of december is 25.6 ° c.
As the month progressed, temperatures tended to moderately fall, reaching an average of 24.6 ° c by. The 2025 almanac predicts a winter with a “heart of cold,” forecasting big freezes and heavy snowfall in the central provinces.