Greater Sydney in summer 2023-24

Rainfall

  • Rainfall was close to its summer average at all sites across Greater Sydney, ranging between 85% at Cooranbong (Lake Macquarie) and Holsworthy Aerodrome to 138% at Mount Boyce.

Temperature

Sydney (Observatory Hill)

  • Total rainfall for Sydney (Observatory Hill) is estimated to be 389 mm.
  • The estimated summer total rainfall includes around 35 mm (based on nearby sites) on 20 February, missed due to an equipment fault caused by a lightning strike.
  • The mean daily maximum temperature for Sydney (Observatory Hill) was 28.2 °C.
  • The warmest day was 40.0 °C on 9 December, and the coolest day was on 20 December when the temperature reached 18.5 °C.
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 20.1 °C.
  • The coldest morning was 15.6 °C on 3 December, and the warmest morning was on 26 January when the minimum temperature was 24.0 °C.

Extremes in summer 2023-24
Hottest day 44.0 °C at Badgerys Creek AWS on 9 Dec 2023
Warmest days on average 30.4 °C at Penrith Lakes AWS
Coolest days on average 24.5 °C at Mount Boyce AWS
Coldest day 14.0 °C at Katoomba (Farnells Rd) on 15 Jan 2024
Coldest night 8.6 °C at Mount Boyce AWS on 23 Dec 2023
Coolest nights on average 14.0 °C at Mount Boyce AWS
Warmest nights on average 20.7 °C at Sydney Harbour (Wedding Cake West)
Warmest night 24.7 °C at Terrey Hills AWS on 26 Jan 2024
24.7 °C at Sydney Olympic Park AWS (Archery Centre) on 5 Feb 2024
Warmest on average overall 24.7 °C at Penrith Lakes AWS
Coolest on average overall 19.2 °C at Mount Boyce AWS
Wettest overall 578.5 mm at Bilpin Post Office
Wettest day 136.4 mm at Kurrajong Heights (Bells Line of Road) on 15 Jan 2024
Strongest wind gust 91 km/h at Wattamolla AWS on 19 Dec 2023
91 km/h at Wattamolla AWS on 21 Jan 2024

Record highest summer mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Norah Head AWS 27.6 = 27.6 in 2016 28 25.9



Record highest summer mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Parramatta North (Masons Drive) 19.5 19.1 in 2016 56 17.2
Norah Head AWS 20.5 20.4 in 2009 28 19.4



Record highest summer mean temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Norah Head AWS 24.1 24.0 in 2016 28 22.7



Summary statistics for summer 2023-24
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
summer
2023-24
Diff
from
average
Highest for
summer
2023-24
Mean for
summer
2023-24
Diff
from
average
Lowest for
summer
2023-24
Total for
summer
2023-24
Average
for
summer
Rank of
summer
2023-24
Fraction of
summer
average
Badgerys Creek AWS 30.0 +0.8 44.0 9 Dec 2023 18.2 +1.6 12.7 3 Dec 2023 294.2 248.1 average 119%
Bankstown Airport AWS 29.4 +1.4 42.5 9 Dec 2023 19.3 +1.6 14.5 3 Dec 2023 263.0 272.4 average 97%
Camden Airport AWS 29.7 +0.7 42.5 9 Dec 2023 17.9 +1.5 12.0 25 Feb 2024 279.2 248.3 average 112%
Campbelltown (Mount Annan) 29.3 +0.3 41.9 9 Dec 2023 17.5 +1.1 11.8 25 Feb 2024 287.6 247.9 average 116%
Canterbury Racecourse AWS 28.0 +0.8 41.6 9 Dec 2023 19.0 +1.1 14.1 3 Dec 2023 327.0 273.7 average 119%
Cooranbong (Lake Macquarie AWS) 28.7 +0.7 40.9 26 Jan 2024 18.3 +1.3 12.6 5 Dec 2023 286.2 336.2 average 85%
Gosford AWS 28.3 +0.9 41.4 9 Dec 2023 19.3 +1.0 13.7 6 Jan 2024 273.0
Holsworthy Aerodrome AWS 29.0 +0.5 42.6 9 Dec 2023 18.5 +1.0 13.1 3 Dec 2023 216.8 255.2 average 85%
Holsworthy Defence AWS 28.6   43.8 9 Dec 2023 17.7   12.4 25 Feb 2024 285.4
Horsley Park Equestrian Centre AWS 29.2 +0.3 42.6 9 Dec 2023 18.4 +1.1 13.6 3 Dec 2023 305.0 264.2 average 115%
Mangrove Mountain AWS 28.6 +1.8 40.3 9 Dec 2023 17.4 +1.0 11.7 6 Jan 2024 286.4 334.1 average 86%
Mount Boyce AWS 24.5 +1.2 34.3 9 Dec 2023 14.0 +1.3 8.6 23 Dec 2023 480.4 349.0 high 138%
Norah Head AWS 27.6 +1.7 39.6 26 Jan 2024 20.5 +1.1 16.8 21 Dec 2023 263.0 271.9 average 97%
Parramatta North (Masons Drive) 28.9 +0.9 40.5 9 Dec 2023 19.5 +2.3 15.0 3 Dec 2023 359.4 308.6 average 116%
Penrith Lakes AWS 30.4 +0.3 43.9 9 Dec 2023 19.0 +1.0 14.7 3 Dec 2023 324.8 275.3 average 118%
Richmond RAAF 30.2 +0.7 43.8 9 Dec 2023 18.8 +1.5 13.6 3 Dec 2023 249.8 275.4 average 91%
Sydney (Observatory Hill) 28.2   40.0 9 Dec 2023 20.1   15.6 3 Dec 2023
Sydney Airport AMO 28.0 +1.6 43.5 9 Dec 2023 20.0 +1.4 15.4 25 Dec 2023 356.0 285.7 high 125%
Sydney Harbour (Wedding Cake West) 25.6 +1.3 37.7 23 Feb 2024 20.7 +0.8 15.6 3 Dec 2023
Sydney Olympic Park AWS (Archery Centre) 28.8 +0.7 42.5 9 Dec 2023 19.6 +1.1 14.3 3 Dec 2023 315.4 351.0 average 90%
Terrey Hills AWS 26.6 +0.6 40.7 9 Dec 2023 18.7 +1.0 14.3 3 Dec 2023 356.0 342.4 average 104%

Notes

The Seasonal climate summary, usually published in the first week of the following month, lists the main features of the weather in Greater Sydney using the most timely and accurate information available on the date of publication; it will generally not be updated.

This summary includes data from observing sites in or near the Greater Sydney “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to represent a socio-economic definition of each capital city. This means the greater capital city boundary includes people who regularly socialise, shop or work within the capital city, but live in the small towns and rural areas surrounding the capital city. It does not define the built up edge of the capital city.

This statement has been prepared based on information available at 10 am on Friday 1 March 2024. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.


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