Monday, 1 June 2020 - Seasonal Climate Summary for Greater Sydney - Product code IDCKGC25L0

Greater Sydney in autumn 2020: near average rainfall, below average temperature

Autumn 2020 was fairly typical with rainfall being close to average throughout. Mean maximum temperatures were a little cooler than usual inland, but near average along the coast. Minimum temperatures were slightly below average in most areas.

Near average rainfall

• Greater Sydney recorded near average rainfall for autumn, ranging from 72% of average at Springwood (Valley Heights) to 117% of average at Horsley Park Equestrian Centre
• Autumn began with wetter than average conditions in March, followed by below average rainfall in April and near to above average rainfall in May
• The wettest period for autumn was from 4 to 6 March, as an inland trough drew in tropical moisture from Ex-Tropical Cyclone Esther; most sites recorded three day totals of 50 mm to 100 mm
• Sydney (Observatory Hill) had 46 rain days in autumn, compared to the average of 39 days
• Sydney Airport recorded on average 6.1 hours of bright sunshine per day in autumn, below the average of 6.7 hours

Cooler than average days and nights

• Mean maximum temperatures for autumn were generally up to 1 °C cooler than average inland and close to average along the coastal fringe, ranging from 1.0 °C below average at Campbelltown (Mount Annan) to 1.0 °C above average at Sydney (Observatory Hill)
• There were 30 days where the maximum temperature reached 25 °C or higher at Sydney (Observatory Hill), which is above the average of 21 days, and 3 days in March where the temperature exceeded 30 °C
• Mean minimum temperatures were up to 1 °C cooler than average, with the exception of Sydney (Observatory Hill) and Sydney Airport, which were 0.3 °C and 0.6 °C above average respectively
• Katoomba had its lowest autumn mean daily minimum temperature since 1917

Sydney (Observatory Hill)

• Total rainfall was 306.8 mm, which is 82% of the long-term average of 375.5 mm
• The mean daily maximum temperature was 23.3 °C, which is 1.0 °C above the long-term average of 22.3 °C
• The warmest day was 37.6 °C on 2 March, and the coolest day was on 15 May when the temperature reached 15.6 °C
• The mean daily minimum temperature was 15.0 °C, which is 0.3 °C above the long-term average of 14.7 °C
• The coldest morning was 7.8 °C on 11 May, and the warmest morning was on 6 March when the minimum temperature was 20.9 °C

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top