Sydney in August 2013: Warm, dry, sunny end to winter

  • Equal-warmest August on record for mean temperatures
  • Most days above 20 °C on record, fewest days below 18 °C
  • Well below average rainfall, fewest rain days since 2003
  • Sunniest August since 1995

Rainfall - Fewest rain days since 2003

Sydney Observatory Hill recorded 15 mm of rain during August, well below the historical average of 80.3 mm and the driest August since 2009. There were only five rain days during the month, with two exceeding 1 mm (average 7 days), the fewest since 2003. Almost all of the rain fell on the 8th and 9th associated with a coastal surface trough, with daily falls of 5-10 mm across the city, reaching 12.8 mm at Rose Bay.

Temperature - Equal-warmest August with persistently mild days

The average maximum temperature at Sydney Observatory Hill during August was 21.1 °C, 3.3 °C above the historical average, with well above average temperatures across the city. This was the second-warmest August on record for Sydney, following 21.3 °C during 1995, associated with persistently dry, mild weather throughout the month and an increased frequency of warm westerly winds.

There were twenty days during August that reached at least 20 °C (average 6 days), while only four days failed to reach 18 °C (average 18 days), in both cases breaking the previous records set in August 2009. No days reached 25 °C, while the only cold spell was associated with the rain event of the 8th, with temperatures dropping to 13.1 °C on the 8th.

The average minimum temperature at Observatory Hill was 10.5 °C, 1.5 °C above the historical average, with night-time temperatures closer to normal in western Sydney associated with the generally clear conditions. The average temperature for August was consequently 15.8 °C, 2.4 °C above the historical average and the equal-warmest on record.

See a list of August temperature records.

Other phenomena

Sydney Airport recorded an average of 9.0 hours of bright sunshine during August, well above the historical average of 7.9 hours and the sunniest August since 1995.

The prevailing wind direction was W-NW, forming 48% of 3 pm winds, above normal for August. There were eight strong wind days at the airport, with wind gusts exceeding 90 km/h across the city on the 12th during the passage of a cold front, causing power outages, downed trees, and some roof damage.

Further information

Media
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Extremes in August 2013
Hottest day 29.3 °C at Richmond RAAF on the 30th
Warmest days on average 21.6 °C at Richmond RAAF
Coolest days on average 19.2 °C at Terrey Hills AWS
Coldest day 11.6 °C at Terrey Hills AWS on the 8th
Coldest night -1.8 °C at Camden Airport AWS on the 22nd
Coolest nights on average 3.6 °C at Camden Airport AWS
Warmest nights on average 10.5 °C at Sydney (Observatory Hill)
Warmest night 15.3 °C at Sydney Airport AMO on the 30th
Warmest on average overall 15.8 °C at Sydney (Observatory Hill)
15.8 °C at Sydney Airport AMO
Coolest on average overall 12.1 °C at Camden Airport AWS
Wettest overall 19.4 mm at Rose Bay (Royal Sydney Golf Club)
Wettest day 12.8 mm at Rose Bay (Royal Sydney Golf Club) on the 8th
Highest wind gust 96 km/h at Camden Airport AWS on the 12th

Record highest August mean temperature
Mean daily
temperature
for August 2013 (°C)
Previous warmest
for August
Years of
record
Average for
August
Sydney (Observatory Hill) 15.8 = 15.8 in 2007 154 13.4
Sydney Airport AMO 15.8 15.7 in 2009 74 13.2


Summary statistics for August 2013
Maximum temperatures
for August
(°C)
Minimum temperatures
for August
(°C)
Rainfall
for August
(millimetres)
Mean for
August
2013
Diff
from
average
Highest for
August
2013
Mean for
August
2013
Diff
from
average
Lowest for
August
2013
Total for
August
2013
Average
for
August
Rank of
August
2013
Fraction of
August
average
Badgerys Creek AWS 20.6   27.4 30th 5.0   -0.1 22nd 7.0
Bankstown Airport AWS 21.1 +2.2 28.3 30th 6.4 +0.4 1.0 22nd 9.8 47.1 average 21%
Camden Airport AWS 20.7 +1.7 27.9 30th 3.6 -0.2 -1.8 22nd 4.8 41.4 low 12%
Campbelltown (Mount Annan) 20.5   27.6 30th 4.5   -0.2 22nd 7.8
Canterbury Racecourse AWS 20.6   28.1 30th 7.0   1.6 22nd 13.0
Holsworthy Aerodrome AWS 20.7   27.7 30th 6.3   0.8 16th 8.0
Holsworthy Control Range 20.7   27.5 30th 5.4   -0.7 22nd 7.4
Horsley Park Equestrian Centre AWS 20.5   27.8 30th 6.7   2.3 16th 8.6
Parramatta North (Masons Drive) 20.9 +1.9 28.1 30th 7.9 +0.8 3.2 16th 10.0 53.5 low 19%
Penrith Lakes AWS 21.4   28.5 30th 6.2   2.1 22nd 0.4
Prospect Reservoir 20.9 +2.2 27.0 30th 7.5 +0.7 3.2 21st 8.6 49.5 low 17%
Richmond RAAF 21.6   29.3 30th 4.8   -0.8 21st 7.4 29.5 low 25%
Riverview Observatory 20.4 +2.0 26.7 30th     2.6 16th 11.4 69.5 low 16%
Springwood (Valley Heights) 19.3   26.4 30th 7.7   4.2 9th 7.6 53.1 low 14%
Sydney (Observatory Hill) 21.1 +3.3 24.7 30th 10.5 +1.5 7.0 9th 15.0 79.8 low 19%
Sydney Airport AMO 21.2 +2.9 27.4 30th 10.3 +2.2 6.6 22nd 15.8 74.8 low 21%
Terrey Hills AWS 19.2   27.1 30th 8.8   4.4 20th 15.0

Daily rainfall
Hunter (61)12345678910111213141516171819202122232425262728293031
Webbs Ck-Wisemans Ferry (Hawkesbury Rive - 0.2 - - - - - 8.4 1.0 - - - 0.2 - - - - - - - - - - - - - - - - - -
Central Tablelands (South) (63)12345678910111213141516171819202122232425262728293031
North Richmond (Hospital) - - - - - - - 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Springwood (Valley Heights) - - - - - - 0.4 6.0 0.2 - - 0.2 0.8 - - - - - - - - - - - - - - - - - -
Metropolitan (East) (66)12345678910111213141516171819202122232425262728293031
Abbotsford (Blackwall Point Rd)








4.0




















Auburn (Rosnay Golf Club) - - - - - - 1.0 9.0 2.0 - - - - - - - - - - - - - - - - - - - - - -
Audley (Royal National Park) - - - - - - - 7.0 1.0 - - - - - - - - - - - - - - - - - - - - - -
Avalon (Wollstonecraft Ave) - - - - - - - 10.0 7.0 - - - - - - - - - - - - - - - - - - - - - -
Avalon Beach (Avalon (Palmgrove Rd)) - - - - - - - - 6.8





















Bankstown Airport AWS - 0.2 - - - - 0.4 8.6 0.6 - - - - - - - - - - - - - - - - - - - - - -
Belrose (Evelyn Place) - - - - - - 0.6 10.0 4.6 - - - - - - - 0.2 - - - - - - - - - - - - - -
Campbelltown (Ingleburn (Long Point)) - - - - - - - 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Canterbury Racecourse AWS - - - - - - 1.2 8.2 3.4 - - - - - - - - - - - - - - - - - 0.2 - - - -
Castle Cove (Rosebridge Ave)






8.0 6.0





















Chatswood Bowling Club - - - - - - - 7.0 4.0 - - - - - - - - - - - - - - - - - - - - - -
Collaroy (Long Reef Golf Club)






8.0






















Concord Golf Club - - - - - - 0.6 9.4 1.8





















Cronulla South Bowling Club






8.0 7.0





















Frenchs Forest (Frenchs Forest Rd) - - - - - - 1.0 9.0 4.0 - - - - - - - - - - - - - - - - - - - - - -
Guildford (Woodville Golf Club) - - - - - - - 10.0 1.0 - - - - - - - - - - - - - - - - - - - - - -
Holsworthy Aerodrome AWS - - 0.2 - - - 0.2 7.4 0.2 - - - - - - - - - - - - - - - - - - - - - -
Holsworthy Control Range 0.2 - - -
- 0.4 6.2 0.4 - - - - - - - - - - - - - - - - - - - - - 0.2
Lidcombe (Carnarvon Golf Club) - - - - - - - 11.0 1.0 - - - - - - - - - - - - - - - - - - - - - -
Liverpool-Scrivener St (Georges River) - - - - - - - 8.0 - - - - - - - - - - - - - - - - - - - - - - -
Lucas Heights (ANSTO)





0.6 4.6






















Macquarie Park (Willandra Village) - - - - - - - 8.0 3.8





















Marrickville Golf Club - - - - - - 1.0 10.0 3.0 - - - - - - - - - - - - - - - - - - - - - -
Milperra Bridge (Georges River) - - - - - - 1.0 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Mona Vale Golf Club 0.2 0.2 - - - - 0.2 10.4 5.2 - - - - - - - 0.2 - - - - - - - 0.2 0.2 - 0.2 0.4 - -
Oatley (Woronora Parade)





1.0 7.0 2.0





















Parramatta (Erts) - 0.5 - - - - - 5.0 1.5 - - - - - - - - - - - - - - - - - - - - - -
Parramatta North (Masons Drive) - - - - - - 0.4 8.0 1.6 - - - - - - - - - - - - - - - - - - - - - -
Peakhurst Golf Club - - - - - - - 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Randwick Bowling Club 0.8 - - - - - 1.4 10.4 5.2 - - - - - -















Riverview Observatory - - - - - »» »» »» 4.0 - - - - - - - - - - - - - - - - - - 0.2 - - -
Rose Bay (Royal Sydney Golf Club)






12.8 6.6





















Sans Souci (Public School) - - - - - - - 6.0 3.0 - - - - - - - - - - - - - - - - - - - - - -
St Ives (Richmond Avenue)






12.0 3.0 0.2





0.4












-
Strathfield Golf Club - - - - - - 1.0 8.0 2.0 - - - - - - - - - - - - - - - - - - - - - -
Sydney (Observatory Hill) - - - - - - 0.8 9.6 4.2 - - 0.2 - 0.2 - - - - - - - - - - - - - - - - -
Sydney Airport AMO - - - - - - 0.4 10.4 5.0 - - - - - - - - - - - - - - - - - - - - - -
Sydney Botanic Gardens 0.4 - - - - - 0.8 10.4 5.4 - - - - - - - - - - - - - - - - - - -


Terrey Hills AWS - - - - - - 0.6 9.6 4.6 - - - - - - - - - - - - - - - - - - - - - 0.2
Turramurra (Kissing Point Road)





0.6 9.0 6.2






0.2












-
Metropolitan (West) (67)12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield City Farm) - - - - - - - 8.0 - - - - - - - - - - - - - - - - - - - - - - -
Badgerys Creek AWS 0.2 - - - - -
6.8 - - - - - - - - - - - - -
- - - - - - - - -
Baulkham Hills (Swimming Pool ) - - - - - 0.5 0.5 5.0 1.0 - - - - - - - - - - - - - - - - - - - - - -
Baulkham Hills Eucalyptus Ct - - - - - 1.0 - 6.5 0.5 - - - - - - - - - - - - - - - - - - - - - -
Berowra (Goodwyn Road) - - - - - - - - 11.2 - - - - - - - - - - - - - - - - - - - - - -
Blacktown (Dog Pound) - - - - - 0.5 - 6.0 0.5 - - - - - - - - - - - - - - - - - - - - - -
Box Hill (Hynds Road) 1.0 - - - - - - 6.0 1.0 - - - - - - - - - - - - - - - - - - - - - -
Castle Hill (Kathleen Ave) - - - - - - - 5.0 2.8





















Glenorie (Old Northern Rd)






10.8






















Greystanes (Cumberland Golf Club) - - - - - - - 7.0 0.5 - - - - - - - - - - - - - - - - - - - - - -
Horsley Park Equestrian Centre AWS - - - - - - 0.6 7.6 0.4 - - - - - - - - - - - - - - - - - - - - - -
Kelso Ck (Kelso Creek U/S Levee (Georges 0.5 - - - - - 0.5 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Kings Langley (NSW Soccer Federation) - - - - - - 0.5 5.0 1.0 - - - 0.5 - - - - - - - - - - - - - - - - - -
Maroota (Tobruk) - 0.2 - - - - - 8.0 1.4 - - - - - - - - - - - - - - - - - - 0.2 - - -
Merrylands West (Finlayson Creek) - - - - 0.5 - - 8.0 0.5 - - - - - - - - - - - - - - - - - - - - - -
North Parramatta (Burnside Homes) - - - - - - - 5.5 1.0 - - - - - - - - - - - - - - - - - - - - - -
North Rocks (Muirfield Golf Club) - 0.5 - - - - - 5.0 1.5 - - - - - - - - - - - - - - - - - - - - - -
Northmead Bowling Club - 0.5 - - - - - 5.0 1.5 - - - - - - - - - - - 1.0 - - - - - - - - - -
Penrith Lakes AWS 0.2 - - - - - -
- 0.2 - - - - - - - - - - - - - - - - - - - - -
Prospect Reservoir - - - - - - 0.7 7.1 0.8 - - - - - - - - - - - - - - - - - - - - - -
Richmond RAAF - - - - - - - 7.2 - - - - - - - - - - - 0.2 - - - - -
-
- - -
Sackville - 0.2 - - - - - 7.2 0.8 0.2 0.2 - - - - - - - - - - - - - - - 0.2 - - - -
Seven Hills (Radio FM 103.2) - - - - - 0.5 - 5.5 0.5 - - - - - - - - - - - - - - - - - - - 0.5 0.5 -
Seven Hills (Collins St)






7.0






















South Creek (Elizabeth Drive)





0.5 3.5






















Toongabbie Bowling Club - - - - - - - 5.5 0.5 - - - - - - - - - - 0.5 - - - - - - - - - - -
Toongabbie Ck (Redbank Road (Toongabbee - - - - - 0.5 - 6.0 1.5 - - - - - - - - - - - - - - - - - - - - - -
West Pennant Hills (Cumberland S F Alert - - - - - - 0.5 5.0 1.5 0.5 - - - - - - - - - - - - - - - - - - - - -
Willmot (Resolution Ave) - - - - - - - 4.0 - - - - - - - - - - - - - - - - - - - - - - -
Windsor SWC (Hawkesbury River) - - - - - - - 7.0 - - - - - - - - - - - - - - - - - - - - - - -
Illawarra (68)12345678910111213141516171819202122232425262728293031
Camden Airport AWS - - - - - - - 4.6 - - - - - - - - - - - - - - - - - - - - - 0.2 -
Campbelltown (Kentlyn (Georges River Roa - 1.0 - - - - - 6.0 - - - - - - - - - - - - - - - - - - - - - - -
Campbelltown (Mount Annan) - 0.2 - - - - - 6.0 - - - - 1.4 - - - - - - - - - - - - - - - - - 0.2
Rossmore (South Creek) - - - - - - - 7.0 - - - - - - - - - - - - - - - - - - - - - - -

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 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 8 am on Monday 2 September 2013. 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