Sydney in December 2013: A sunny end to the year

  • Driest, warmest and sunniest December since 2005
  • Cool, wet Christmas

Rainfall

Sydney Observatory Hill recorded just 31.0 mm of rain during December, well below the historical average of 77.6 mm and the driest December since 2005. The rain fell over seven rain days (average 12 days), with only one day recording more than 5 mm. Most of the rain was recorded over Christmas, with 21 mm to 9 am on the 26th at Observatory Hill and up to 34.4 mm at Springwood. Isolated showers also caused locally heavy rain in southern Sydney on the 15th and 16th, reaching 46.4 mm at Randwick.

Temperature

The mean maximum temperature at Sydney Observatory Hill during December was 26.4 °C, 1.2 °C above the historical average and the warmest December since 2005, with well above average temperatures across the city. There were three days that reached at least 30 °C, which is average for December, reaching 36 °C on the 23rd, while temperatures exceeded 40 °C at Penrith on the 20th and 22nd. No days dropped below 20 °C, with the coldest day reaching 21.5 °C on the 25th.

The mean minimum temperature at Sydney Observatory Hill during December was 18.6 °C, 1.1 °C above the historical average. Eight nights exceeded 20 °C during the month (average 4 nights), while eighteen consecutive nights exceeded 18 °C between the 9th and 26th, the fifth such spell on record for December and the first since 2000. The mean temperature for December was 22.5 °C, 1.2 °C above the historical average.

Other phenomena

The prevailing wind direction during December was northeasterly, with 65% of 3 pm winds between NNE and ENE, while 23% of winds were between S and SE. There were eight strong wind days during the month, with gusts reaching 94 km/h at the airport and 106 km/h in western Sydney during a cool change on the 5th, as well as 89 km/h at the airport and 98 km/h at Port Botany on the 29th.

There was an average of 9.4 hours of bright sunshine during the month, well above the historical average of 7.9 hours and the sunniest December since 2005. There was only one thunderstorm reported at the airport during December, which is below the historical average of 3 storms.

Further information

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(03) 9669 4057
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Extremes in December 2013
Hottest day 41.9 °C at Penrith Lakes AWS on the 20th
Warmest days on average 30.8 °C at Penrith Lakes AWS
Coolest days on average 25.6 °C at Terrey Hills AWS
Coldest day 19.1 °C at Terrey Hills AWS on the 25th
Coldest night 7.5 °C at Camden Airport AWS on the 7th
7.5 °C at Campbelltown (Mount Annan) on the 7th
Coolest nights on average 14.9 °C at Campbelltown (Mount Annan)
Warmest nights on average 18.7 °C at Sydney Airport AMO
Warmest night 24.1 °C at Sydney Airport AMO on the 10th
Warmest on average overall 23.9 °C at Penrith Lakes AWS
Coolest on average overall 21.1 °C at Terrey Hills AWS
Wettest overall 77.4 mm at Randwick Bowling Club
Wettest day 46.4 mm at Randwick Bowling Club on the 15th
34.4 mm at Springwood (Valley Heights) on the 26th
Highest wind gust 106 km/h at Camden Airport AWS on the 5th
106 km/h at Richmond RAAF on the 5th

Summary statistics for December 2013
Maximum temperatures
for December
(°C)
Minimum temperatures
for December
(°C)
Rainfall
for December
(millimetres)
Mean for
December
2013
Diff
from
average
Highest for
December
2013
Mean for
December
2013
Diff
from
average
Lowest for
December
2013
Total for
December
2013
Average
for
December
Rank of
December
2013
Fraction of
December
average
Badgerys Creek AWS 29.6   41.0 22nd 15.7   8.9 7th 28.8
Bankstown Airport AWS 28.6 +1.3 40.1 20th 16.8 +0.2 10.5 7th 31.4 66.7 low 47%
Camden Airport AWS 29.6 +1.2 40.9 22nd 15.0 -0.1 7.5 7th 35.0 54.4 average 64%
Campbelltown (Mount Annan) 28.8   40.6 20th 14.9   7.5 7th 35.2
Canterbury Racecourse AWS 26.7   38.4 20th 16.4   9.8 7th 1.2
Holsworthy Aerodrome AWS 28.4   41.2 20th 16.2   8.9 7th 34.4
Holsworthy Control Range 28.1   40.1 20th 15.5   9.2 7th 28.2
Horsley Park Equestrian Centre AWS 29.1   40.3 20th 16.0   9.9 6th 33.6
Parramatta North (Masons Drive) 28.3 +0.9 40.2 20th 16.4 +0.2 9.6 6th 35.6 70.2 low 51%
Penrith Lakes AWS 30.8   41.9 20th 17.1   11.0 7th 36.6
Prospect Reservoir 29.3 +1.9 40.2 22nd 16.3 0.0 9.7 6th 32.3 74.9 low 43%
Richmond RAAF 29.5 +1.0 39.8 20th 15.8 -0.2 9.1 7th 29.0
Springwood (Valley Heights) 28.3   38.5 20th 15.4   10.0 6th 50.4 101.3 low 50%
Sydney (Observatory Hill) 26.4 +1.2 36.0 23rd 18.6 +1.1 12.7 6th 31.0 77.3 low 40%
Sydney Airport AMO 27.3 +1.6 37.8 20th 18.7 +1.2 13.1 6th 56.2 73.5 average 76%
Terrey Hills AWS 25.6   36.9 20th 16.6   9.3 6th 33.6

Daily rainfall
Hunter (61)12345678910111213141516171819202122232425262728293031
Webbs Ck-Wisemans Ferry (Hawkesbury Rive 0.2 - - - 12.2 0.2 - - - - - - - - - - - - - - - - - 0.4 0.8 19.8 - - - - -
Central Tablelands (South) (63)12345678910111213141516171819202122232425262728293031
North Richmond (Hospital) - - - - 1.0 - - - - - - - - - - - - - - - - - - - 1.0 31.0 3.0 - - - -
Springwood (Valley Heights) - - - - 1.6 0.4 - - - - - - - - 0.4 4.0 - - - - - - - 1.8 3.0 34.4 4.8 - - - -
Metropolitan (East) (66)12345678910111213141516171819202122232425262728293031
Abbotsford (Blackwall Point Rd) - - - - 4.5 - - - - - - - - - - - 1.0 - - - 1.5 - - - - - - 28.0 - - -
Auburn (Rosnay Golf Club) 1.0 - - - 4.0 - - - - - - - - - - - - - - - - - - - - 19.0 5.0 - - - -
Audley (Royal National Park) - - - - 5.0 - - - - - - - - - - 6.0 1.0 - - - - - - - 1.0 21.0 3.0 - - - -
Avalon (Wollstonecraft Ave) - - - - 1.0 - - - - - - - - - - - - - - - 3.0 - - - 1.0 25.0 1.0 - - - -
Avalon Beach (Avalon (Palmgrove Rd)) - - - - - - - - - - - - - - - - - - - - 4.2 - - 0.6






Bankstown Airport AWS - - - - 4.6 - - - - - - - - - - 2.2 0.4 - - 0.4 - - - - 0.2 19.6 4.0 - - - -
Belrose (Evelyn Place) 0.4 - - - 5.8 - - - - 0.2 - 0.2 - - 0.2 1.4 - - - - 2.0 - - - 2.2 24.6 3.8 - - - -
Campbelltown (Ingleburn (Long Point)) - - - - 9.0 - - - - - - - - - - - - - - - - - - - - 18.0 3.0 - - - -
Canterbury Racecourse AWS - - - - 0.2 0.2 - - - - - - - - - 0.2 - - - - - - - - - - 0.4 0.2 - - -
Castle Cove (Rosebridge Ave) - - - - 5.0 - - - - 1.0 - - - - - - - - - - - - - - 4.0 25.0 4.0 - - - -
Chatswood Bowling Club - - - - 5.0 - - - - 2.0 - - - - - 1.0 - - - - - - - - - 25.0 2.0 - - - -
Collaroy (Long Reef Golf Club)



4.2



















21.6 0.8



Concord (Brays Rd) - - - - 4.6 - - - - - - - - - 0.1 2.8 - - - - - - - - 0.4 21.2 4.2 - - - -
Concord Golf Club - - - - 4.8 - - - - - - - - - - - - - - - - - - - - 18.8 5.2



Cronulla South Bowling Club













»» 15.4 7.4













Frenchs Forest (Frenchs Forest Rd) 1.0 - - - 5.0 1.0 - - - - - - - - - 3.0 - - - - - - - - 2.0 25.0 4.0 - - - -
Guildford (Woodville Golf Club) - - - - 4.0 - - - - - - - - - - - - - - - - - - - - 18.0 6.0 - - - -
Holsworthy Aerodrome AWS 0.2 - - - 7.6 0.2 - - - - - - - - - 0.2 0.4 - - - 0.2 - - - 0.2 21.0 4.4 - - - -
Holsworthy Control Range
- - - 6.8 - - - - - - - - - - - 0.6 - - - - - - - - 17.6 3.2 - - - -
Lidcombe (Carnarvon Golf Club) - - - - 4.0 - - - - - - - - - - 1.0 - - - - - - - - - 19.0 5.0 - - - -
Liverpool-Scrivener St (Georges River) - - - - 5.0 - - - - - - - - - - 6.0 1.0 - - - - - - - - 16.0 7.0 - - - -
Lucas Heights (ANSTO)



6.2








1.0 7.4














Marrickville Golf Club - - - - 4.0 - - - - - - - - - 1.0 4.0 9.0 - - - - - - - - 7.0 4.0 1.0 1.0 - -
Milperra Bridge (Georges River) - - - - 5.0 - - - - - - - - - - 4.0 - - - - - - - - - 17.0 3.0 - - - -
Mona Vale Golf Club - - - - 1.2 - - - - - - - - - - 0.4 - - - - 0.8 - - - 2.2 22.6 2.8 - - - -
Oatley (Woronora Parade)













1.0















Parramatta (Erts) 1.0 0.5 - - 4.0 - - - - - - - - - - - - - - - - - - - - 17.5 2.0 - - - -
Parramatta North (Masons Drive) 1.4 - - - 5.8 0.6 - - - - - - - - - 1.0 - - - - - - - - 1.4 22.0 3.4 - - - -
Peakhurst Golf Club - - - - 3.0 - - - - - - - - - - 5.0 1.0 - - - 1.0 - - - - 17.0 2.0 - - - -
Randwick Bowling Club »» 0.3 - - 3.6 - - - - - - - - - 46.4 2.4 - - - - - 0.1 - - 1.0 21.8 1.8 - - - -
Riverview Observatory »» 0.2 - - 4.2 - - - - - - - - - »» 2.0 - - - - 1.0 - - »» 0.4 »» 25.8 - - - -
Rose Bay (Royal Sydney Golf Club) - - - - - 4.6 - - - - - - - - 27.8 2.0 - - - - - - - - 0.6 20.8 0.8 - - - -
Sans Souci (Public School) - - - - 2.0 1.0 - - - - - - - - 2.0 12.0 3.0 - - - - - - - - 17.0 1.0 - - - -
St Ives (Richmond Avenue)



5.4


















2.0 14.4 2.0


-
Strathfield Golf Club 1.0 - - - 4.0 - - - - - - - - - - - 1.0 - - - - - - - - 17.0 3.0 - - - -
Sydney (Observatory Hill) - - - - 4.0 - - - - - - - - - 1.2 2.2 0.2 - - - - - - - 0.6 21.0 1.8 - - - -
Sydney Airport AMO - - - - 3.2 0.2 - - - - - - - - 6.0 21.8 7.8 0.2 - - - - - - 0.2 15.8 1.0 - - - -
Sydney Botanic Gardens - - - - 4.4 - - - - - - - - - - 3.2 2.8 - - - - - - 1.5 24.6 1.4 - - - - -
Terrey Hills AWS - - - - 5.0 - - - - 0.2 - - - - - - - - - - - - - 0.2 2.2 25.0 1.0 - - - -
Turramurra (Kissing Point Road)



5.0



1.0



0.6 0.2 0.4





0.6 2.2 24.4 3.0


-
Metropolitan (West) (67)12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield City Farm) - - - - 6.0 - - - - - - - - - - - - - - - - - - - - 20.0 5.0 - - - -
Badgerys Creek AWS - - - - 3.6 - - - - - - - - - - - - - - - - - - - - 17.8 7.2 0.2 - - -
Baulkham Hills (Swimming Pool ) - - - - 5.5 - - - - - - - - - - - - - - - - - - 0.5 0.5 22.5 4.0 - - - -
Baulkham Hills Eucalyptus Ct - - - - 6.0 - - - - - - - - - - 0.5 - - - - - - - - 1.0 21.0 3.0 - - - -
Berowra (Goodwyn Road) - - - - 3.8 - - - - - - - - - - 1.2 - - - - - - - »» 1.2 24.8 2.8 - - - -
Blacktown (Dog Pound) 0.5 - - - 4.5 - - - - - - - - - - - - - - - - - - - - 17.5 5.0 - - - -
Box Hill (Hynds Road) - - - - 3.0 - - - - - - - - - - - - - - - - - - - - 25.0 2.0 - - - -
Castle Hill (Kathleen Ave) 0.6 - - - 4.6 - - - - - - - - - 0.3 - - - - - - - - 0.7 0.9 23.0 5.6 - - - -
Glenorie (Old Northern Rd)


6.0



















22.0 1.2




Greystanes (Cumberland Golf Club) - - - - 5.0 - - - - - - 2.5 1.0 - - 1.0 - - - - - - - - - 19.0 4.5 - - - -
Horsley Park Equestrian Centre AWS
- - - 6.6 - - - - - - - - - - 1.4 0.2 - - - 0.4 - - -
19.4 5.4 0.2 - - -
Kelso Ck (Kelso Creek U/S Levee (Georges - - - - 6.0 - - - - - - - - - - 5.0 - - - - - - - - - 15.0 3.0 - - - -
Kings Langley (NSW Soccer Federation) 0.5 - 0.5 - 5.5 - - - - - - - - - - - - - - - - - - - 1.0 23.5 3.0 - - - -
Maroota (Tobruk) - - - - 2.0 - - - - - - - - - - - - - - - - - - 0.6 0.8 17.0 1.0 - - - -
Merrylands West (Finlayson Creek) - - - - 4.5 - - - - - - - - - - - - - - - - - - - - 17.5 3.5 - - - -
North Parramatta (Burnside Homes) 1.0 - - - 5.0 0.5 - - - - - - - - - 0.5 - - - - - - - - 1.0 22.0 3.0 - - - -
North Rocks (Muirfield Golf Club) - - 0.5 - 6.0 0.5 - - - - - - - - - 0.5 - - - - - - - - 1.0 19.0 3.0 - - - -
Northmead Bowling Club - - - - 5.5 - - - - - - - - - 0.5 0.5 - - - - - - - - 1.0 19.5 3.5 - - - -
Penrith Lakes AWS - - - - 2.4 - - - - - - - - - - 1.4 - - - - - - 0.2 0.4 1.2 25.0 5.8 0.2 - - -
Prospect Reservoir - - - - 5.3 - - - - - - - - - 0.2 0.9 - - - - - - - - 0.4 20.3 5.2 - - - -
Richmond - UWS Hawkesbury »» 1.4 - - 2.6 - - - - - - - - - - - - - - - - - - 0.6 - - 28.8 - - - -
Richmond RAAF 0.2 - - - 2.4 - - - - - - - - - - - - - - - - - - 0.6 - 24.4 1.2 0.2 - - -
Sackville - - - - 5.2 - - - - - - - - - - - - - - - - - - 0.4 0.2 22.6 1.0 - - - -
Seven Hills (Radio FM 103.2) - - - - 6.0 - - - - - - - - - - - - - - - - - - - - 19.5 4.0 - - - -
Seven Hills (Collins St)



6.6



















26.0 5.2



South Creek (Elizabeth Drive)



3.0



















10.0 3.0



Toongabbie Bowling Club - - - - 6.0 - - - 0.5 1.0 - - - - - 2.0 0.5 - - - - - 0.5 - 0.5 18.5 4.5 - - - -
Toongabbie Ck (Redbank Road (Toongabbee 0.5 - - - 5.5 - 0.5 - - - - - - - 1.0 1.0 - - - - - - - - 0.5 20.0 2.5 - - - -
West Pennant Hills (Cumberland S F Alert - - - - 4.5 - - - - - - - - - - - - - - - - - - - 1.5 22.0 4.0 - - - -
Willmot (Resolution Ave) - - - - 4.0 - - - - - - - - - - - - - - - - - - - - 24.0 4.0 - - - -
Windsor SWC (Hawkesbury River) - - - - 2.0 - - - - 1.0 - - - - - - - - - - - - - - - 22.0 1.0 - - - -
Illawarra (68)12345678910111213141516171819202122232425262728293031
Camden Airport AWS - - - - 11.4 - - - - - - - - - - - - - - - - - - - - 15.6 8.0 - - - -
Campbelltown (Kentlyn (Georges River Roa - - - - 9.0 1.0 - - - - - - - - - - - - - - 1.0 - - - - 17.0 3.0 - - - -
Campbelltown (Mount Annan) - 0.8 - - 12.8 0.2 - - - - - - - - - 0.2 1.0
- - - - - 0.6 - 15.6 4.0 - - - -
Rossmore (South Creek) - - - - 5.0 1.0 - - - - - - - - - 1.0 - - - - - - - - - 16.0 6.0 - - - -

Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with »» are part of a longer accumulation, which is marked like this on the final day. Values over 100 mm have been rounded to the nearest whole millimetre. Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.


Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Sydney - Greater Sydney using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

This statement has been prepared based on information available at 9 am on Monday 6 January 2014. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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 20 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
Enquiries