Sydney in June 2012: Two East Coast Lows bring wind and rain to Sydney

  • Wettest June since 2007
  • Warm days in the city, but coldest in five years
  • East Coast Lows hit the city

Rainfall - Wettest June since 2007

Sydney Observatory Hill recorded 244.2 mm of rain during June, well above the historical average of 130.5 mm and the wettest June since 2007 (510.6 mm). The rain fell over 15 days, close to normal for June (12 days), of which 11 exceeded 5 mm (average 5 days).

The majority of the rain fell as an East Coast Low (ECL) developed off the north coast of NSW on the 11th, with two days of heavy rain across the NSW coast. Sydney Observatory Hill recorded a 48 hour total of 125.8 mm to the 12th, the highest 2-day total in June since the severe ECLs of June 2007, with up to 176.6 mm over 48 hours at Dover Heights in eastern Sydney.

Further rain fell as a surface trough crossed the state at the beginning on the month, with 27.4 mm on the 3rd and 11.2 mm on the 4th. This was followed by falls of 19.2 mm in the city and up to 57.2 mm at Collaroy on the 6th as an ECL developed in the trough and moved northward. A period of moist easterly windflow triggered additional showers in eastern parts of the city at the end of the month.

Temperature - Warm days in the city, but coldest in five years

The average maximum temperature at Sydney Observatory Hill during June was 17.7 °C, 0.8 °C above the historical average, with temperatures generally below average at shorter-record sites in western Sydney. This is the coolest June since 2007 (16.8 °C) and was associated with above average rainfall and below average sunshine during the month. Three days dropped below 15 °C, half the historical average but the most since June 2007. This included a maximum of 13.7 °C on the 26th, the coldest June day since 13.2 °C on 19th June 2007.

Minimum temperatures were also slightly warmer than normal across the city, with an average of 9.7 °C at Observatory Hill, 0.4 °C above normal. There were 13 nights above 10 °C, slightly above normal for June (11 nights), with the coldest night reaching 6.4 °C; on average 1-2 nights drop below 6 °C during June. The average temperature at Sydney Observatory Hill during June was 13.7 °C, 0.6 °C above normal.

Wind - East Coast Lows hit the city

The prevailing wind direction at Sydney Airport during June was northwesterly in the mornings (60%) and southerly to westerly in the afternoons (73%), normal for June.

There were two strong wind days, below normal for June (4 days), both associated with an East Coast Low that crossed the city on the afternoon of the 5th. This brought short-lived heavy rainfall and very strong wind gusts, reaching 104 km/hr at Sydney Airport, 117 km/hr at Port Botany and 128 km/hr at Wattamolla. This was the strongest wind gust at Sydney Airport since 107 km/hr during an ECL in August 2010, and the strongest June winds since 106 km/hr in during an ECL in 1978.

Mean winds remained above 50 km/hr at Sydney Airport from 4 pm on the 5th to 7am on the 6th, resulting in roof damage and power outages. This is the longest period above 50 km/hr since the ECL of 6-9 June 2007, and only the 20th event with such sustained winds since records began in 1939. The system also resulted in large waves and beach erosion, with maximum wave heights off Sydney exceeding 10 m for eighteen hours between 6pm on the 5th and midday on the 6th, reaching almost 14 m overnight.

A second ECL developed off the north coast of the state the following weekend, bringing heavy rainfall to Sydney but weaker wind and wave impacts, with a maximum wind gust at Sydney Airport of 54 km/hr on the 11th.

Other Phenomena

The average daily sunshine at Sydney Airport was 5.3 hours, below average for June (6 hours). There were no thunderstorms, normal for June, with one fog reported at the airport.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in June 2012
Hottest day 21.8 °C at Richmond RAAF on the 15th
Warmest days on average 17.7 °C at Sydney (Observatory Hill)
17.7 °C at Sydney Airport AMO
Coolest days on average 15.5 °C at Springwood (Valley Heights)
Coldest day 10.7 °C at Springwood (Valley Heights) on the 26th
Coldest night -1.2 °C at Richmond RAAF on the 24th
Coolest nights on average 4.8 °C at Camden Airport AWS
Warmest nights on average 9.7 °C at Sydney (Observatory Hill)
9.7 °C at Sydney Airport AMO
Warmest night 14.0 °C at Sydney (Observatory Hill) on the 3rd
14.0 °C at Sydney Airport AMO on the 3rd
Warmest on average overall 13.7 °C at Sydney (Observatory Hill)
13.7 °C at Sydney Airport AMO
Coolest on average overall 10.8 °C at Camden Airport AWS
Wettest overall 274.4 mm at Randwick Bowling Club
Wettest day 89.8 mm at Rose Bay (Royal Sydney Golf Club) on the 11th
Highest wind gust 117 km/h at Port Botany (Molineux Point AWS) on the 5th

Summary statistics for June 2012
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2012
Diff
from
average
Highest for
June
2012
Mean for
June
2012
Diff
from
average
Lowest for
June
2012
Total for
June
2012
Average
for
June
Rank of
June
2012
Fraction of
June
average
Badgerys Creek AWS 16.8   20.4 15th 5.6   -0.3 25th 86.2
Bankstown Airport AWS 17.3 -0.4 20.9 4th 6.8 +0.2 1.6 24th 128.8 74.4 high 173%
Camden Airport AWS 16.9 -0.8 19.9 4th 4.8 +0.3 -0.7 25th 88.0 59.0 high 149%
Campbelltown (Mount Annan) 17.0   20.1 4th 5.4   0.1 25th 75.8
Canterbury Racecourse AWS 17.3   20.6 4th 6.8   1.5 24th 178.2
Holsworthy Control Range 16.9   20.3 29th 6.0   -0.2 24th 95.6
Horsley Park Equestrian Centre AWS 16.7   20.1 15th 7.0   0.2 24th 102.2
Liverpool (Michael Wenden Centre) 17.2   20.9 4th 6.3   0.2 25th 88.7
Parramatta North (Masons Drive) 17.1 -0.7 20.6 29th 7.5 0.0 2.7 8th 169.4 86.2 high 197%
Penrith Lakes AWS 17.1   20.3 29th 7.0   1.0 24th 65.4
Prospect Reservoir 16.5 -0.8 19.8 15th 7.3 -0.1 2.2 24th 117.9 75.2 high 157%
Richmond RAAF 17.3   21.8 15th 5.2   -1.2 24th 72.4
Riverview Observatory 17.4 +0.2 20.1 15th 8.2 +0.5 4.4 8th 232.0 117.5 high 197%
Springwood (Valley Heights) 15.5   19.1 4th 7.5   3.2 24th 86.8 77.1 high 113%
Sydney (Observatory Hill) 17.7 +0.8 20.9 15th 9.7 +0.4 6.4 8th 244.2 131.2 high 186%
Sydney Airport AMO 17.7 +0.1 21.5 15th 9.7 +1.1 6.0 24th 191.2 120.7 high 158%
Terrey Hills AWS 15.8   18.8 29th 8.4   3.4 24th 205.8

Daily rainfall
Hunter (61)123456789101112131415161718192021222324252627282930
Webbs Ck-Wisemans Ferry (Hawkesbury Rive - 2.0 7.5 8.5 - 17.5 1.5 - - - 3.0 12.5 2.0 2.0 0.5 - 5.5 - - - - - - - - - 4.5 - - -
Central Tablelands (South) (63)123456789101112131415161718192021222324252627282930
Springwood (Valley Heights) - 3.4 26.4 1.0 - 11.6 0.6 - - - 7.6 24.0 5.8 1.2 0.2 - 3.0 - - - - - 0.8 - - - 1.2 - - -
Metropolitan (East) (66)123456789101112131415161718192021222324252627282930
Abbotsford (Blackwall Point Rd) 0.8
14.0 10.4
24.0


2.0
68.0 7.0


10.0







»» 12.8


Auburn (Rosnay Golf Club) - - 11.0 6.0 - 15.0 1.0 - - 1.0 30.0 65.0 3.0 1.0 1.0 - 8.0 - - - - - - - - - - - - -
Audley (Royal National Park) 1.0 - 9.0 9.0 - 23.0 7.0 - - 2.0 23.0 46.0 10.0 6.0 1.0 1.0 8.0 - - - - - - - - - 3.0 - - -
Avalon (Wollstonecraft Ave) - - 12.0 9.0 - 18.0 4.0 4.0 - 1.0 34.0 38.0 21.0 3.0 1.0 - 6.0 - - - - - - - - 16.0 9.0 - 1.0 -
Avalon Beach (Avalon (Palmgrove Rd))

»» 30.2
22.8 4.6


36.2
25.2 4.4










12.8



Bankstown Airport AWS - - 8.0 6.4 - 15.8 0.6 - - 0.4 28.8 56.4 2.6 0.4 - 0.2 9.2 - - - - - - - - - - - - -
Belrose (Evelyn Place) 0.4 0.4 23.2 11.8
17.4 8.0

0.6 41.0 65.2 12.0 15.4
0.8 8.0







5.1 4.6 0.3 0.4 0.1
Campbelltown (Ingleburn (Long Point)) - - 12.0 5.0 - 24.0 2.0 - - - 8.0 43.0 7.0 5.0 - 1.0 9.0 - - - - - - - - - 1.0 - - -
Canterbury Racecourse AWS 0.2 - 13.6 9.2 - 25.6 5.4 0.2 - 1.6 40.6 56.0 6.4 2.6 0.2 - 9.0 - - - - - - - - 0.8 6.6 0.2 - -
Castle Cove (Rosebridge Ave)


15.0 3.0 37.0 5.0
5.0
22.0 58.0 7.0 14.0
1.5 8.0







2.0 11.0 1.0

Chatswood Bowling Club 1.0 - 14.0 12.0 - 29.0 8.0 1.0 - 1.0 62.0 75.0 8.0 11.0 - 1.0 8.0 - - - - - - - - 3.0 3.0 1.0 - -
Collaroy (Long Reef Golf Club)

17.8 11.8
57.2


1.2 40.6 62.2 17.6 16.8










12.6 1.0 1.2 1.8
Concord Golf Club 0.2
10.2 9.4
31.4 4.4

















4.6 3.0
0.4
Cronulla South Bowling Club 0.8
»» 49.0
27.0


»» 45.0 42.0 9.0 21.0
0.2








4.2 27.0 8.2

Guildford (Woodville Golf Club) - - 12.0 6.0 - 17.0 - - - 1.0 27.0 72.0 1.0 1.0 1.0 - 7.0 - - - - - - - - - - - 1.0 -
Holsworthy Control Range - - 10.8 3.8 - 17.8 - 0.2 - 0.2 14.2 33.0 1.4 1.4 - 0.2 7.4 0.2 - - - - - - - 4.0 0.8 - 0.2 -
Lidcombe (Carnarvon Golf Club) - - 6.0 5.0 - 9.0 - - - - 28.0 48.0 1.0 1.0 - - 7.0 - - - - - - - - 1.0 - - - -
Lucas Heights (ANSTO)

9.8 5.0
27.0 2.6


»» 49.2 11.6 5.6

9.0







1.0 1.4


Macquarie Park (Willandra Village)

»» 22.6
24.2 5.6

0.4 50.2 62.8 6.2 5.2 0.2 0.4 »» 10.0






4.4 7.6


Manley / Warringah (Allambie) 0.5 - 17.5 12.0 - 27.5 5.5 - - 1.5 46.0 56.0 11.0 12.5 0.5 0.5 7.5 - - - - - - - - 7.5 7.0 0.5 1.0 -
Marrickville Golf Club 1.0 - 18.0 11.0 - 29.0 6.0 - - 2.0 56.0 55.0 9.0 5.0 - 1.0 9.0 - - - - - - - - 1.0 7.0 - 1.0 -
Mona Vale Golf Club - - 15.2 12.4 - 20.4 6.6 0.4 - 1.8 41.2 66.0 15.4 7.8 0.4 1.0 6.2 - - - - - - - - 6.6 1.6 - 2.4 0.2
Parramatta (Erts) - - 12.0 6.5 - 10.0 0.5 - - - 30.0 51.5 1.0 3.0 - - 7.5 - - - - - - - - - 1.0 - - -
Parramatta North (Masons Drive) 0.4 0.4 13.0 7.8 - 20.2 2.4 - - 0.8 43.4 61.0 1.8 4.6 - 0.2 10.0 - - - - - - - - 0.8 2.2 0.2 0.2 -
Peakhurst Golf Club - - 10.0 8.0 - 17.0 4.0 - - 1.0 39.0 60.0 5.0 1.0 - 1.0 8.0 - - - - - - - - 2.0 1.0 - - -
Randwick Bowling Club - 1.0 30.8 11.4
20.6 6.2

5.0 80.0 55.8 17.0 16.4
0.8 9.4







8.4 10.0
1.6
Riverview Observatory 0.4 0.2 12.6 11.6 0.2 »» 31.8 0.2 0.2 1.2 »» 129 8.0 8.2 0.4 0.4 11.8 - - - - - - - - 7.4 7.6 - 0.4 -
Rose Bay (Royal Sydney Golf Club)
0.4 31.4 10.8
24.0 7.4

2.0 89.8 53.4 9.8 15.6 0.4 1.0 9.0







5.4 12.0 0.2

Sans Souci (Public School) - - 17.0 10.0 - 23.0 5.0 - - 2.0 57.0 49.0 7.0 9.0 - 1.0 8.0 - - - - - - - - 1.0 4.0 - - -
St Ives (Richmond Avenue) 0.6 0.2 13.4 11.8
26.4 7.2 0.2
0.6 26.6 58.8 8.4 9.6 0.2 0.8 7.4







3.0 6.0 0.2

Strathfield Golf Club 1.0 - 8.0 9.0 - 24.0 4.0 - - 1.0 41.0 64.0 4.0 2.0 - 1.0 8.0 - - - - - - - - - 2.0 - - -
Sydney (Observatory Hill) 0.2 0.2 27.4 11.2 - 19.2 6.8 - - 2.4 76.4 49.4 8.6 13.8 - 0.4 8.4 - - - - - - - - 8.8 9.4 - 1.6 -
Sydney Airport AMO - 0.2 31.0 10.4 - 22.8 5.0 - - 2.2 47.2 37.2 12.4 6.6 0.2 0.2 8.8 - - - - - - - - 0.6 5.8 - 0.6 -
Terrey Hills AWS 0.8 0.2 20.2 13.0 - 36.4 6.6 - 0.4 0.6 20.4 61.4 12.8 12.6 0.2 0.4 8.0 - - - - - - - - 6.0 5.2 0.2 0.4 -
Turramurra (Kissing Point Road) 0.6 0.4 17.0 12.2
27.6 7.0

0.2 39.6 78.0 4.6 11.2

9.4







2.0 4.2
0.2 -
Metropolitan (West) (67)123456789101112131415161718192021222324252627282930
Abbotsbury (Fairfield City Farm) - - 11.0 3.0 - 18.0 - - - - 15.0 42.0 1.0 - - - 6.0 - - - - - - - - - - - - -
Badgerys Creek AWS - 0.6 16.0 0.2 - 13.2 0.2 0.2 - 0.2 11.6 30.8 4.6 0.8 - 0.2 6.8 - - - - - - - - - 0.8 - - -
Baulkham Hills (Swimming Pool ) - 0.5 8.5 6.5 - 17.5 2.5 - - 0.5 37.0 47.5 2.5 2.5 0.5 - 9.0 - - - - - - - - 0.5 1.5 - - -
Baulkham Hills Eucalyptus Ct



- 8.5 2.0 - - - 32.5 57.5 2.0 3.0 - - 9.5 - - - - - - - - 0.5 1.5 - - -
Berowra (Goodwyn Road)
1.0 12.6 5.6
20.8 2.0


18.0 41.6 8.0 3.2
0.4









6.6


Blacktown (Dog Pound) - - 8.5 4.0 - 14.0 2.0 - - - 17.5 54.0 0.5 2.0 - - 7.0 - - - - - - - - - 1.5 - - -
Box Hill (Hynds Road) - 1.0 6.0 4.0 - 15.0 2.0 - - - 15.0 28.0 1.0 3.0 - - 6.0 - - - - - - - 1.0 - - - - 1.0
Castle Hill (Kathleen Ave)

9.0 7.6
21.0 2.8

0.2 36.3 44.6 7.5 3.4

9.5







1.8 1.2


Glenorie (Old Northern Rd)
1.6 11.0 9.4
24.0 4.0


10.0 33.0 2.0 1.4

8.0








2.4


Greystanes (Cumberland Golf Club) - - 10.5 5.5 - 10.5 0.5 - - - 25.0 60.5 0.5 1.0 - - 7.5 - - - - - - - - - - - - -
Horsley Park Equestrian Centre AWS - - 10.8 2.8 - 17.0 0.4 - - 0.2 16.6 46.4 0.8 0.4 - 0.2 5.6 0.2 - - - - - - - - 0.6 - - 0.2
Kelso Ck (Kelso Creek U/S Levee (Georges - - 8.0 5.5 - 17.0 0.5 - - 1.0 21.0 45.5 2.5 1.5 - 1.0 7.0 - - - - - - - - 0.5 0.5 1.0 - -
Kings Langley (NSW Soccer Federation) - 0.5 10.0 6.0 - 16.5 1.0 - - - 28.0 52.0 1.0 2.0 0.5 - 7.5 0.5 - - - - - - - - 1.5 - - -
Liverpool (Michael Wenden Centre) - - 12.2 4.0 0.2 14.0 - - - - 12.6 36.8 1.5 0.6 - - 6.4 - - - - - - - - - 0.4 - -
Lower Portland (Hawkesbury River) - 1.6 10.8 4.4 - 15.8 3.0 - - 0.2 4.4 18.4 2.2 1.4 - 0.2 4.4 - - 0.2 - 0.2 - - - - 1.8 - - -
Maroota (Tobruk) 0.4 3.0 11.4 8.6 - 22.2 2.4 0.4 0.2 - 7.4 17.4 3.0 1.6 0.4 0.2 5.6 - - - - - - - - - 6.2 - 0.4 0.2
Merrylands West (Finlayson Creek) - - 9.0 5.5 1.0 11.5 1.0 - - - 26.0 61.0 0.5 1.0 - - 7.0 0.5 - - - - - - - - - - - -
North Parramatta (Burnside Homes) - - 13.0 8.0 - 20.0 2.0 - - - 40.0 63.5 2.5 4.5 - 0.5 11.5 - - - - - - - - 0.5 2.0 - - -
North Rocks (Muirfield Golf Club) - - 9.0 7.5 0.5 20.0 2.0 - - - 41.0 53.5 2.5 4.0 - - 9.0 - - - - - - - - 1.0 1.0 - 0.5 -
Northmead Bowling Club - 0.5 8.0 6.5 - 16.0 2.0 0.5 - - 36.0 56.5 1.5 3.0 - - 8.0 - - - - - - - - 0.5 1.5 - - -
Parramatta (Baulkham Hills West (Sierra - 0.5 9.0 6.0 -
























Penrith Lakes AWS - 1.2 13.4 0.2 0.2 11.8 0.2 0.2 0.2 - 6.6 23.0 1.2 1.0 0.2 0.2 3.8 0.2 0.2 - 0.2 - - 0.2 0.2 0.2 0.6 - - 0.2
Prospect Reservoir - 0.2 9.8 4.8 - 14.7 1.1 - - 0.1 19.0 55.8 1.0 2.4 - - 7.2 - - - - - - - - - 1.6 - 0.1 0.1
Richmond RAAF - 0.8 17.4 1.2 0.2 16.6 1.4 0.2 - - 7.2 18.4 1.8 0.6 0.4 - 4.8 - - - - - - - - - 1.2 - - 0.2
Sackville 0.2 2.2 8.6 4.8 - 16.8 1.4 0.4 - 0.2 6.0 15.4 1.4 2.8 0.2 0.4 4.8 0.2 - 0.2 0.2 - - - 0.2 0.2 2.2 - 0.2 0.2
Seven Hills (Radio FM 103.2) - 0.5 7.5 4.0 - 13.0 0.5 - - 0.5 23.0 46.5 1.0 1.5 - - 8.0 - -


- - - - 1.0 - - -
Seven Hills (Collins St)
1.0 »» 14.6
14.8



32.0 44.8 »» 3.8

8.2








1.4


South Creek (Elizabeth Drive)
0.5 9.5

7.0


0.5 6.0 12.0 1.0


3.0












St Clair (Juba Close) - - 8.0 - - 10.0 - - - - 10.0 29.0 2.0 - - - 4.0 - -


- - - - 1.0 - - -
Toongabbie Bowling Club - - 8.0 5.5 - 14.0 1.0 - - - 26.5 49.0 0.5 2.0 - 0.5 7.5 - - - - - - - - - 1.0 - - -
Toongabbie Ck (Redbank Road (Toongabbee 0.5 0.5 9.5 6.0 - 17.0 1.5 - - 0.5 34.5 57.0 0.5 3.0 - - 9.5 - - - - - - - - 0.5 1.0 - 0.5 -
West Pennant Hills (Cumberland S F Alert - - 9.0 8.0 - 19.5 3.0 - - - 33.5 48.5 5.5 5.0 - - 10.0 - - - - - - - - 2.5 1.0 0.5 - -
Willmot (Resolution Ave) - - 8.0 1.0 - 14.0 - - - - 13.0 28.0 - 1.0 - - 6.0 - -



- - - 4.0 - - -
Windsor SWC (Hawkesbury River) - 1.0 7.0 2.0 - 14.0 1.0 - - - 9.0 17.0 3.0 - - - 5.0 - - - - - - - - - 1.0 - - -
Illawarra (68)123456789101112131415161718192021222324252627282930
Camden Airport AWS - 0.2 30.6 0.2 - 12.8 - - - 0.2 5.4 24.4 1.8 2.2 - 0.2 9.6 - - - - - - - - - 0.2 - - 0.2
Campbelltown (Kentlyn (Georges River Roa - - 10.0 3.0 - 22.0 - 1.0 - - 4.0 29.0 1.0 4.0 - 2.0 7.0 - - - - - - - - - - - - -
Campbelltown (Mount Annan) - - 16.6 0.6 0.2 15.0 - 0.2 0.2 0.6 4.0 23.8 1.2 3.0 - 0.2 9.2 - - - 0.2 - - - - - 0.8 - - -
Rossmore (South Creek) - - 21.0 1.0 - 13.0 - - - - 11.0 28.0 5.0 2.0 - 1.0 5.0 - - - - - - - - 1.0 - - - 1.0

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 2 July 2012. 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