Sydney in August 2010: Warm, sunny end to winter

  • Plentiful sunshine - sunniest August since 1997
  • Below average rainfall
  • Warm days and warm nights

Rainfall

Sydney Observatory Hill reported 27.0 mm of rain during August 2010, which is well below the historical August rainfall of 81.2 mm. The rain fell over seven days, with the most significant falls occurring on the third of the month, associated with a low pressure system off the NSW coast. This event brought 16.4 mm of rain at Observatory Hill, over half the August total, with a maximum fall of 28.2 mm at Mona Vale Golf Club. Further light falls also occurred between the tenth and eleventh, associated with the passage of a cold front, and related to onshore flow and a low pressure trough on the 19th.

Sydney's water storage is currently at 57.5% of capacity, an increase of 0.4% from July levels despite the low rainfall, which is likely a consequence of the high rain in late July. Current water storage information can be found on the new Bureau of Meteorology Water Storage Beta Release web site.

Temperature

The average maximum temperature at Sydney Observatory Hill in August was 18.3°C, which is 0.5°C above the historical August average of 17.8°C, although the majority of metropolitan stations recorded below average maximum temperatures during the month, particularly in western parts of the city. Only 5 days above 20°C were recorded at Observatory Hill during the month, below the August average of 6. However, no days were recorded below 15.0°C, compared to a historical average of 5 such days, with temperatures close to average throughout the month. The warmest temperature recorded during the month was 25.4°C at Sydney Airport on the 19th, related to warm northeasterly wind patterns.

The average minimum temperature during August at Observatory Hill was 9.5°C, which is 0.5°C above the historical average of 9.0°C, with generally warmer than average minimum temperatures across the metropolitan region. Nights were warmest on the 15th and 16th due to the passage of a front and cloudy conditions, reaching 13.3°C at Sydney Airport on the 15th. The coldest minimums were on the 22nd under a high pressure system, reaching -1.2°C at Richmond.

Wind

North-westerly winds prevailed prevailed in Sydney during august, with over 90% of morning winds between N and W and only two days having southwesterly winds. Northwesterly winds also dominated 52% of afternoon winds, although easterly to southerly sea breezes were experienced on several occasions.

Strong winds were reported at Sydney Airport five times during August, with a maximum wind gust of 107km/hr on the 3rd, associated with a coastal low pressure system.

Other phenomena

Sunshine averaged 8.7 hours at Sydney Airport during August, above the historical average of 7.8 and the highest average sunshine since August 1997 (8.8 hours). Only one thunderstorm was reported at Sydney Airport on the 15th, which was of very short duration and resulted in reports of small hail across Sydney and short bursts of heavy rain, although the highest total rainfall was just 6.5mm at North Rocks.

Further information

Media
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Enquiries

Extremes in August 2010
Hottest day 25.4 °C at Sydney Airport AMO on the 19th
Warmest days on average 18.8 °C at Sydney Olympic Park (Sydney Olympic Pk A
Coolest days on average 16.5 °C at Springwood (Valley Heights)
Coldest day 12.3 °C at Penrith Lakes AWS on the 10th
Coldest night -1.2 °C at Richmond RAAF on the 22nd
Coolest nights on average 4.7 °C at Campbelltown (Mount Annan)
Warmest nights on average 9.5 °C at Sydney (Observatory Hill)
Warmest night 13.3 °C at Sydney Airport AMO on the 15th
Wettest overall 47.6 mm at Mona Vale Golf Club
Wettest day 28.2 mm at Mona Vale Golf Club on the 3rd
Highest wind gust 107 km/h at Sydney Airport AMO on the 3rd




Summary statistics for August 2010
Maximum temperatures
for August
(°C)
Minimum temperatures
for August
(°C)
Rainfall
for August
(millimetres)
Mean for
August
2010
Diff
from
average
Highest for
August
2010
Mean for
August
2010
Diff
from
average
Lowest for
August
2010
Total for
August
2010
Average
for
August
Rank of
August
2010
Fraction of
August
average
Central Tablelands (South) (district 63)
Springwood (Valley Heights) 16.5   22.7 19th 6.6   2.2 17th 28.2 53.9 average 52%
Metropolitan (East) (district 66)
Bankstown Airport AWS 18.2 -0.7 24.7 19th 6.3 +0.3 2.3 18th 24.8 49.1 average 51%
Canterbury Racecourse AWS 18.0   24.5 19th 6.4   2.4 18th 21.0
Holsworthy Control Range 18.0   24.1 19th 5.5   0.5 18th 28.4
Parramatta North (Masons Drive) 18.3 -0.7 24.6 19th 6.8 -0.3 2.5 18th 22.2 55.3 average 40%
Riverview Observatory 18.3 0.0 24.4 19th 8.0 +0.8 4.0 18th 25.5 71.0 low 36%
Sydney (Observatory Hill) 18.3 +0.5 24.6 19th 9.5 +0.6 6.4 8th 27.0 80.8 low 33%
Sydney Airport AMO 18.3 0.0 25.4 19th 9.2 +1.1 6.0 18th 25.8 76.7 low 34%
Sydney Olympic Park (Sydney Olympic Pk A 18.8   25.0 19th 8.6   5.1 8th 23.6
Terrey Hills AWS 16.6   23.3 19th 7.9   4.3 8th 33.2
Metropolitan (West) (district 67)
Badgerys Creek AWS 17.9   23.4 19th 5.3   0.5 18th 20.2
Horsley Park Equestrian Centre AWS 17.7   23.3 19th 6.1   1.2 8th 26.6
Liverpool (Michael Wenden Centre) 18.3   24.4 19th 5.3   1.0 18th 27.6
Penrith Lakes AWS 18.6   24.7 19th 6.3   2.2 18th 23.0
Prospect Reservoir 18.2 -0.5 23.8 19th 6.6 -0.2 2.0 18th 24.1 50.3 average 48%
Richmond RAAF 18.4   24.8 19th 5.0   -1.2 22nd 16.4
Illawarra (district 68)
Camden Airport AWS 18.0 -1.0 24.5 19th 4.9 +1.1 -0.1 18th 31.8 43.1 high 74%
Campbelltown (Mount Annan) 18.3   24.1 19th 4.7   0.2 17th 30.2

Daily rainfall

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.

Hunter (61)12345678910111213141516171819202122232425262728293031
Webbs Ck-Wisemans Ferry (Hawkesbury Rive - - - - - - - - - 2.8 2.4 - - - - - - - 21.0 - - - 0.5 0.5 - - - - - - -
Central Tablelands (South) (63)12345678910111213141516171819202122232425262728293031
Sackville Ferry (Hawkesbury River) - - 4.4 - 0.2 - 0.2 - 0.2 4.2 4.0 - - - - - - - - - - - 1.0 0.2 - - - - - - -
Springwood (Valley Heights) - 1.4 3.2 - - - - - - 6.0 6.8 - - - - 0.6 - - 9.2 - - - 0.6 0.4 - - - - - - -
Valley Heights (Sun Valley Rd)
1.2 9.0 - - -







»» »» »» »» »» »» 21.0 - 0.6 0.4 - - - - - - -
Metropolitan (East) (66)12345678910111213141516171819202122232425262728293031
Abbotsford (Blackwall Point Rd)

13.0





2.6 7.0






2.6











Auburn (Rosnay Golf Club) - - 8.0 - - - - - - 4.0 5.0 - - - - - - - 3.0 - - - - - - - - - - - -
Audley (Royal National Park) - 1.0 13.0 - - - - - - 3.0 6.0 - - - - 3.0 - - 5.0 - - - - - - - - - - - -
Avalon (Wollstonecraft Ave) - - 25.0 7.0 - - - - - 3.0 5.0 - - - - 1.0 - - 1.0 - - - - - - - - - - - -
Avalon Beach (Avalon (Palmgrove Rd))

23.2






6.0 0.2 0.2

2.4





0.4







Bankstown Airport AWS - - 9.0 - - - - - - 4.2 5.8 - - - - 0.8 - - 5.0 -


- - - - - - - -
Belrose (Evelyn Place)
1.0 19.4 0.4




4.4 4.4 0.4


4.6

1.4


0.4






-
Campbelltown (Ingleburn (Long Point)) - - 15.0 - - - - - - 8.0 8.0 - - - - 6.0 - - 7.0 - - - - - - - - - - - -
Canterbury Racecourse AWS
- 10.8 - - - - - -
6.0 - - - - 0.6 - 0.2 3.4 - - - - - - - - - - - -
Castle Cove (Rosebridge Ave)

17.0





2.0 1.0



1.0

1.0











Chatswood Bowling Club - 1.0 14.0 - - - - - - 3.0 5.0 - - - - 3.0 - - 1.0 1.0 - - - - - - - - - - -
Collaroy (Long Reef Golf Club)
0.4 16.6 1.8




2.6 5.8



5.2

0.8











Concord Golf Club
2.8 10.8





5.0 5.6



















Cronulla South Bowling Club
0.4 17.0





3.0 5.0



2.0

4.4











Guildford (Woodville Golf Club) - - 9.0 - - - - - - 4.0 5.0 - - - - 1.0 - - 2.0 - - - - - - - - - - - -
Holsworthy Control Range 0.2 - 10.4 - - - - - - 5.2 6.2 - - - - 0.8 - - 5.6 - - - - - - - - - - - -
Lidcombe (Carnarvon Golf Club) - - 2.0 - - - - - - 4.0 3.0 - - - - 1.0 - - 2.0 - - - - - - - - - - - -
Liverpool-Scrivener St (Georges River) - - 7.0 - - - - - - 5.0 5.0 - - - - - - - 5.0 - - - - - - - - - - - -
Lucas Heights (ANSTO)
0.8 15.0





4.6 6.8 0.6


3.2

5.6











Manley / Warringah (Allambie) -
16.5 1.0 - - - - - 3.0 5.0 - - - - - - - 1.0 20.5 - - - - - - - - - - -
Manley / Warringah (Belrose) -
14.0 0.5 - - - - - - 5.0
- - - 2.5

1.0 - 21.0 - - - - - - - - -
Marrickville Golf Club 1.0 1.0 - 3.0 - - - - - 4.0 5.0 - - - - - - - 4.0 - - - - - - - - - - - -
Milperra Bridge (Georges River) - - 4.0 - - - - - - 3.0 4.0 - - - - - - - 4.0 - - - - - - - - - - - -
Mona Vale Golf Club - 0.4 28.2 4.8 - - - - - 3.6 6.8 0.2 - - - 2.4 - - 0.6 0.4 - - - 0.2 - - - - - - -
Oatley (Woronora Parade)









6.2



















Parramatta (Erts) 0.5 - 3.0 - - - 1.0 - - 3.0 4.5 - - - - - - - 1.0 - - - - - - - - - - - -
Parramatta North (Masons Drive) - 0.2 8.2 - - - - - - 4.2 6.6 0.2 - - - 1.0 - - 1.6 - - - - 0.2 - - - - - - -
Peakhurst Golf Club - - 10.0 - - - - - - 4.0 5.0 - - - - - - - 5.0 - - - - - - - - - - - -
Randwick Bowling Club
0.8




























Riverview Observatory - 0.4 12.8 0.3 - - - - - 3.2 5.4 0.4 - - - 1.2 - - 1.8 - - -

- - - - - - -
Rose Bay (Royal Sydney Golf Club)
0.8 24.2 0.8




3.6 4.6






2.4











Sans Souci (Public School) - - 13.0 - - - - - - 4.0 6.0 - - - - - - - 4.0 - - - - - - - - - - - -
St Ives (Richmond Avenue)
1.0 18.0





5.0 4.2 0.8


2.2

1.4


0.6







Strathfield Golf Club - - 9.0 - - - - - - 4.0 6.0 - - - - 1.0 - - 3.0 - - - - - - - - - - - -
Sydney (Observatory Hill) - 0.4 16.4 - - - - - - 2.8 4.6 0.2 - - - 0.4 - - 2.2 - - - - - - - - - - - -
Sydney Airport AMO 0.2 - 14.4 - - - - - - 2.8 4.4 - - - - - - - 4.0 - - - - - - - - - - - -
Sydney Olympic Park (Sydney Olympic Pk A - 0.2 9.4 - - -

- 4.4 7.0
- - - 0.2 - - 2.4 - - -

- - - - - - -
Terrey Hills AWS - 0.8 21.6 0.6 - - - - - 3.0 5.4 0.4 - - - 0.6 - - 0.6 - - - 0.2 - - - - - - - -
Turramurra (Kissing Point Road)
1.0 14.8





4.2 6.6 0.2 0.2
0.2 2.0

1.6


0.4






-
Metropolitan (West) (67)12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield City Farm) - - 8.0 - - - - - - 5.0 5.0 - - - - - - - 6.0 - - - - - - - - - - - -
Badgerys Creek AWS - - 7.4 - - - - - - 6.6 6.2 - -
- - - -
- - - -
- - - - - - -
Baulkham Hills (Swimming Pool ) - - 7.5 - 1.0 - - - - 4.0 5.5 - - - - 2.5 - - 0.5 0.5 - - - - - - - - - - -
Baulkham Hills Eucalyptus Ct - - 9.0 0.5 1.0 - - - - 4.0 5.5 0.5 - - - 4.0 - - 0.5 0.5 - - - - - - - - - - -
Berowra (Goodwyn Road)

15.6





»» 9.4



1.4





0.6







Blacktown (Dog Pound) - 0.5 7.5 1.0 - - - - - 5.0 4.5 - - - - 2.5 - - 2.0 - - - - - - - - - - - -
Box Hill (Hynds Road) - 1.0 6.0 - - - 1.0 - - 5.0 4.0 - - - - - - - - - - - - - - - - - - - -
Castle Hill (Kathleen Ave)
0.3 8.8
0.1



2.8 5.8 0.4


4.6

1.2


0.5 0.3






Glenorie (Old Northern Rd)

11.0




5.0
3.0










1.0







Greystanes (Cumberland Golf Club) - - 8.0 - - - 0.5 - - 5.0 5.0 - - - - 0.5 - - 1.5 0.5 - - - - - - - - - - -
Hawkesbury River (Sackville Downstream) -
0.5 - - - - - -
0.5 - - - - -
- - - - - - - - - - - -

Horsley Park Equestrian Centre AWS - - 8.8 0.2 - - - - - 4.8 6.0 - - - - 0.8 - - 5.8 - - - - 0.2 - - - - - - -
Kelso Ck (Kelso Creek U/S Levee (Georges - - 8.5 0.5 - - - - - 2.5 7.5 - - - - - - - 5.0 - - - - - - - - - - - -
Kings Langley (NSW Soccer Federation) - - 8.5 1.0 - - - - - 5.5 4.5 - - - - 3.0 - - 1.5 - - - - 0.5 - - - - - - -
Kings Langley (Solander Rd) - 0.2 8.6 - - - - - - 5.2 4.8 0.2 - - - 2.0 - - 1.2 -
- 0.2 0.2 - - - - - - -
Liverpool (Michael Wenden Centre) -
9.9 - - - - - - 5.0 6.9 - - - -
- - 5.8 - - - - - - - - - - - -
Lower Portland (Hawkesbury River) 0.4 - 7.0
- - - - - - 2.2 0.2 - - - 1.0 - - 0.2 - - - 2.2 0.2 - - - - - - -
Maroota (Tobruk) - 0.2 9.6 - - - - - - 3.4 3.0 - - - - 0.2 - - - - - - 2.2 0.4 - - - - - - -
Merrylands (Welsford Street)








4.6 8.4










4.6







Merrylands West (Finlayson Creek) - - 13.5 2.0 - - - - - 8.5 8.5 - - - - 1.0 - - 4.0 - - - - - - - - - - - -
North Parramatta (Burnside Homes) - - 8.0 1.0 - - - - - 3.5 5.0 - - - - 1.0 - - 1.0 1.0 - - - - - - - - - - -
North Rocks (Muirfield Golf Club) - - 9.0 - - - 1.0 - - 4.0 6.0 - - - - 6.5 - - 1.0 - - - - - - - - - - - -
Northmead Bowling Club - - 8.0 0.5 - - - - - 3.5 5.0 - - - - 1.0 - - 0.5 0.5 - - - - - - - - - - -
Parramatta (Baulkham Hills West (Sierra 0.5 - 7.0 - 1.0 - - - - 4.5 5.0 - - - - 1.0 - - 1.0 - - - - - - - - - - - -
Penrith Lakes AWS - 0.2 6.0 - - 0.6 0.2 - - 5.4 4.2 0.2 - - - 1.0 - - 4.6 0.2 - - - 0.2 0.2 - - - - - -
Prospect Reservoir - 0.3 8.5 - - - - - - 5.2 5.8 0.2 - - - 1.3 - - 2.8 - - - - - - - - - - - -
Richmond RAAF 0.4 - 4.8
- - - - - 5.4 4.6 -
-
- - - 0.2 0.2 - - 0.8 -
- - - - -
Seven Hills (Radio FM 103.2) - - 8.0 - -

























Seven Hills (Collins St)

8.6





3.4 7.2



2.2

1.6











St Clair (Juba Close) - - 3.0 - - - - - - 3.0 4.0 - - - - - - - 3.0 - - - - 1.0 - - - - - - -
Toongabbie Bowling Club - 0.5 8.0 1.0 - - - - - 5.0 5.0 - - - - 1.0 - - 1.0 - - - - - - - - - - - -
Toongabbie Ck (Redbank Road (Toongabbee - - 8.0 - 1.5 - - - - 4.0 5.5 - - - - 1.0 - - 1.0 - - - - - - - - - - - -
West Pennant Hills (Cumberland S F Alert 0.5 - 7.5 0.5 - - - - - 4.0 6.0 - - - - 4.0 - - 1.0 - - - - - - - - - - - -
Willmot (Resolution Ave) - - 4.0 - - - - - - 4.0 3.0 - - - - - - - 1.0 - - - - - - - - - - - -
Windsor SWC (Hawkesbury River) - - 2.0 - - - - - - 5.0



















-
Illawarra (68)12345678910111213141516171819202122232425262728293031
Camden Airport AWS 0.4 - 8.8 - - - - - - 6.6 9.6 - - - - 1.6 - - 4.6 - - - 0.2 - - - - - - - -
Camden Valley Golf Resort - - 2.0 - - - - - - 3.0 2.0 - - - - 1.0 - - - - - - - - - - - - - - -
Campbelltown (Kentlyn (Georges River Roa 1.0 - - - - - - - - -

- - - - - - 4.0 - - - - - - - - - - - -
Campbelltown (Mount Annan) 0.6 - 11.2 - - - -
- 5.8 7.4 - - - - 0.6 - - 4.4 - - - 0.2 - - - - - - - -
Rossmore (South Creek) - - 8.0 - - - - - - 5.0 7.0 - - - - - - - 7.0 - - - - - - - - - - - -

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 11 am on Wednesday 1 September 2010. 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.

Further information

Media
(03) 9669 4057
Enquiries