The Bureau of Meteorology reported that in 2021, New South Wales experienced its sixth wettest year on record, with rainfall 30% above average. It was also the coolest year since 1996 with temperatures only 0.15°C above the long-term climate average.
The wet and cool conditions in New South Wales in 2021 would have contributed to the improved air quality experienced across the state, by reducing the frequency and intensity of dust storms, bushfires and wind erosion events. Winter minimum temperatures were warmer than average, reducing smoky nights in regional areas from domestic wood heaters.