Sydney in April 2011: Wettest April since 1999

  • Wettest April since 1999
  • Well above average rain days
  • Close to average temperatures, below average in western Sydney

Rainfall

Sydney Observatory Hill recorded 206.2 mm of rain during April, well above the historical average of 125.8 mm and the wettest April since 244.8 mm fell in April 1999. Following above average rainfall during March, this is the wettest start to Autumn since 1990. The rain fell over 17 days, above the historical average of 12 days, with eight consecutive days of rain between the 23rd and 30th.

The rain fell in two main events. The first, between the 16th and 17th, had daily falls of up to 56.8 mm at Observatory Hill and 66 mm at Sans Souci Public School. The second rainy period towards the end of the month was dominated by easterly winds giving persistent showers in Sydney, with daily totals as high as 31.4 mm at Observatory Hill on the 28th and 54 mm at Avalon (Wollstonecraft Ave) on the 25th. In total, Observatory Hill recorded eleven days with rainfall above 5 mm during the month, the equal 7th highest on record, of which seven exceeded 10 mm, more than double the historical average of 3 days.

Temperature

Maximum temperatures averaged 22.7 °C at Observatory Hill during April, slightly above the historical average of 22.4 °C. The highest daily air temperature was just 27 °C on the 9th, the coolest maximum since 2003, but only four days had maximum temperatures below 20 °C compared to the historical average of 6 days. This was anomalously warm for the Metropolitan region as all other stations recorded below average maximums, particularly in the west with temperatures as much as 1.6 °C below average at Parramatta.

Minimum temperatures at Observatory Hill were average at 14.7 °C, with generally below average minimums in western regions. As with maximums, the range was lower than usual, with the coldest night reaching 11.5 °C and the warmest 17.7 °C, compared to an average range between 10.3 °C and 19 °C. The temperature gradient across the city is likely related to the warm sea surface temperatures near the coast mitigating the cool southerly winds which caused the strong negative anomalies in the west.

Wind

Three strong wind days were reported at Sydney Airport during the month, average for April, with a maximum wind gust of 65 km/hr on the 16th, reaching 72 km/hr at Port Botany. Winds were predominantly S to SE, forming 57% of afternoon winds, slightly above average for this time of year.

Other phenomena

No thunderstorms were reported at Sydney Airport during April, below the historical average of 1-2 storms, with only one storm reported anywhere in the Metropolitan area. Sunshine averaged 6.3 hours at Sydney Airport, below the historical average of 6.9 hours, associated with the high rainfall during the month.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in April 2011
Hottest day 28.2 °C at Sydney Olympic Park (Sydney Olympic Pk A on the 9th
Warmest days on average 23.0 °C at Liverpool (Michael Wenden Centre)
Coolest days on average 20.6 °C at Springwood (Valley Heights)
Coldest day 15.9 °C at Springwood (Valley Heights) on the 26th
Coldest night 4.1 °C at Campbelltown (Mount Annan) on the 12th
Coolest nights on average 10.0 °C at Camden Airport AWS
Warmest nights on average 14.7 °C at Sydney (Observatory Hill)
14.7 °C at Sydney Airport AMO
Warmest night 17.7 °C at Sydney (Observatory Hill) on the 10th
Warmest on average overall 18.7 °C at Sydney (Observatory Hill)
Coolest on average overall 16.3 °C at Camden Airport AWS
Wettest overall 217.0 mm at Avalon (Wollstonecraft Ave)
Wettest day 66.0 mm at Sans Souci (Public School) on the 16th
Highest wind gust 72 km/h at Port Botany (Molineux Point AWS) on the 16th

Summary statistics for April 2011
Maximum temperatures
for April
(°C)
Minimum temperatures
for April
(°C)
Rainfall
for April
(millimetres)
Mean for
April
2011
Diff
from
average
Highest for
April
2011
Mean for
April
2011
Diff
from
average
Lowest for
April
2011
Total for
April
2011
Average
for
April
Rank of
April
2011
Fraction of
April
average
Badgerys Creek AWS 22.7   27.4 9th 10.6   4.6 12th 27.0
Bankstown Airport AWS 22.3 -1.4 27.1 10th 12.3 -0.4 6.9 12th 100.0 83.2 high 120%
Camden Airport AWS 22.5 -1.3 27.2 9th 10.0 -1.0 4.2 12th 32.0 64.9 average 49%
Campbelltown (Mount Annan) 22.8   27.4 9th 10.3   4.1 12th 34.8
Canterbury Racecourse AWS 22.2   27.1 10th 12.0   6.8 12th 109.0
Holsworthy Control Range 22.4   27.3 9th 11.3   4.4 12th 75.8
Horsley Park Equestrian Centre AWS 22.2   27.3 10th 12.2   6.8 12th 67.2
Liverpool (Michael Wenden Centre) 23.0   27.6 9th 11.2   5.4 12th 51.8
Parramatta North (Masons Drive) 22.2 -1.6 27.6 10th 12.1 -0.7 8.9 12th 136.4 87.9 high 155%
Penrith Lakes AWS 22.8   27.8 9th 12.7   7.9 12th 35.0
Prospect Reservoir 22.4 -1.3 27.9 10th 12.5 -0.5 9.0 12th 96.4 74.1 high 130%
Richmond RAAF 22.3   28.0 10th 11.4   6.4 12th 48.6
Riverview Observatory 22.1 -0.7 27.0 9th 13.0 +0.1 9.6 12th 199.4 108.0 high 185%
Springwood (Valley Heights) 20.6   25.2 9th 12.2   8.2 12th 60.8 87.7 average 69%
Sydney (Observatory Hill) 22.7 +0.3 27.0 9th 14.7 0.0 11.5 12th 206.2 126.3 high 163%
Sydney Airport AMO 22.5 -0.4 27.7 10th 14.7 +0.6 10.9 12th 202.2 106.0 high 191%
Sydney Olympic Park (Sydney Olympic Pk A 22.6   28.2 9th 13.9   10.3 12th 157.4
Terrey Hills AWS 21.0   26.6 10th 13.0   9.3 12th 147.4

Daily rainfall
Hunter (61)123456789101112131415161718192021222324252627282930
Webbs Ck-Wisemans Ferry (Hawkesbury Rive - 0.5 - - 0.5 5.0 2.0 0.5 - - 5.5 0.5 - - - - 40.0 - - - - - - 0.5 - 10.0 1.5 3.5 - 2.0
Central Tablelands (South) (63)123456789101112131415161718192021222324252627282930
Sackville Ferry (Hawkesbury River) 2.6 - - - 2.8 0.8 0.2 - 0.2 - 10.8 - - - - 14.0 31.4 0.2 0.2 - 0.2 - - 1.0 2.2 7.0 1.8 7.4 8.2 4.0
Springwood (Valley Heights) 1.2 - - 1.2 0.2 2.0 - - - - 0.6 - - - - 2.2 7.4 - - - - - - 0.2 5.4 9.8 17.2 2.0 5.6 5.8
Valley Heights (Sun Valley Rd) 1.2
- 1.2 0.2 2.4 0.2 - - - 0.6 - - - - 2.6 6.8 - -
0.2 - - 0.2 5.2 10.0 17.0 »» 11.0 6.0
Metropolitan (East) (66)123456789101112131415161718192021222324252627282930
Abbotsford (Blackwall Point Rd) 1.0


13.2 5.4 6.0


9.4



21.0 42.0





8.0 6.8 7.0 5.0 30.0 18.0 14.0
Ashfield Bowling Club














»» 54.0












Auburn (Rosnay Golf Club)



























7.0 16.0
Audley (Royal National Park) - - - - 22.0 10.0 - 1.0 - - 6.0 - - - - 18.0 18.0 - - - - - 2.0 1.0 21.0 8.0 14.0 13.0 10.0 54.0
Avalon (Wollstonecraft Ave) 5.0 - - - 13.0 1.0 5.0 - - - 9.0 - - - - 31.0 23.0 - - - - - 2.0 6.0 54.0 16.0 - 14.0 27.0 11.0
Avalon Beach (Avalon (Palmgrove Rd))





6.8







32.2 21.2




»» »» »» 87.4 0.4 15.6 28.0 15.2
Bankstown Airport AWS 0.4 0.2 - - 8.2 3.6 0.4 - - - 8.4 - - - - 12.0 18.0 - - - - - 0.4 - 6.8 6.2 4.2 10.6 11.4 9.2
Belrose (Evelyn Place) 3.6


23.0 3.2 3.4


10.8



64.6 19.6 0.2



5.6 2.6 12.8 16.4 6.4 24.8 9.2 5.6
Campbelltown (Ingleburn (Long Point)) 1.0 - - - 3.0 1.0 1.0 - - - 7.0 - - - - 9.0 5.0 - - - - - - - 3.0 5.0 3.0 2.0 9.0 24.0
Canterbury Racecourse AWS 0.4 - - - 15.8 2.4 3.2 - - - 6.4 - - - - 40.2 26.8 - - - - - 1.4 4.2 4.2 4.0 - - - -
Castle Cove (Rosebridge Ave)



25.0 4.0



9.5



55.0 15.0




3.0 7.0 9.0 25.0 5.5 35.0 8.0 5.0
Chatswood Bowling Club 5.0 - - - 19.0 4.0 1.0 - - - 10.0 - - - - 49.0 12.0 - - - - - 1.0 5.0 19.0 11.0 4.0 39.0 7.0 5.0
Collaroy (Long Reef Golf Club) 0.4


5.4 4.0 9.4







41.8 25.2





9.0 32.6 23.8 1.6 13.2 3.6 4.4
Concord Golf Club



12.0 2.4 3.2


8.0 23.8


20.4 35.4




1.8 4.8 8.2 1.2 8.2 36.2

Cronulla South Bowling Club









7.0



35.6 8.4




19.2 »» »» 28.0 4.0 14.2 »» 76.0
Guildford (Woodville Golf Club) - - - - 9.0 2.0 1.0 - - - 7.0 - - - - 14.0 16.0 - 1.0 - - - - 1.0 7.0 7.0 3.0 17.0 13.0 17.0
Holsworthy Control Range - - - - 2.2 3.6 - - - - 4.8 - -
- 15.6 6.6 - - - - - - - 6.8 5.8 2.6 2.2 7.8 17.8
Lidcombe (Carnarvon Golf Club) 2.0 - - - 6.0 3.0 1.0 - - - 4.0 - - - - 18.0 11.0 - - - - - 1.0 - 9.0 4.0 5.0 16.0 13.0 15.0
Liverpool-Scrivener St (Georges River) - - - - 2.0 3.0 - - - - 6.0 - - - - 9.0 11.0 - - 5.0 - - - - 3.0 6.0 1.0 2.0 6.0 12.0
Lucas Heights (ANSTO)



8.0 7.6



6.8



28.0 16.7




0.5
11.0 6.0 2.4 6.8 11.8 43.3
Macquarie Park (Willandra Village) 2.0


11.2 2.8 4.2 0.2

12.0



34.2 29.6 0.6



1.4 4.0 12.4 13.6 1.8 32.2 9.8 7.6
Manley / Warringah (Allambie) 2.5 - - - 14.5 3.0 0.5 - - - 8.5 - - - - 40.5 12.0 - - - - - 6.0 3.0 21.0 16.5 4.5 15.0 4.5 4.5
Manley / Warringah (Belrose) 3.0 - - - 17.5 3.0 2.0 -
- 10.0
- - - 21.5 18.0 - 0.5 - - - - 2.5 5.0 13.0 3.5 15.5 7.5 4.0
Marrickville Golf Club - - - - 18.0 2.0 4.0 - - - 7.0 - - - - 41.0 27.0 - - - - - 2.0 6.0 4.0 3.0 4.0 39.0 23.0 36.0
Milperra Bridge (Georges River) - 1.0 - - 3.0 1.0 1.0 - -




















Mona Vale Golf Club 6.4 - - - 9.6 2.4 7.0 - 0.2 0.2 10.2 - - - - 30.0 18.6 - 0.2 0.4 0.2 - 0.6 5.0 46.4 21.2 3.4 18.8 19.0 8.0
Parramatta (Erts) 0.5 - - - 3.0 2.0 3.5 - - - 4.5 - - - - 12.0 17.5 - - - - - - - 4.0 3.5 2.0 12.5 11.5 12.0
Parramatta North (Masons Drive) 0.8 - - - 6.6 3.0 1.2 - - - 8.8 - - - - 23.0 27.0 - - - - - - 1.8 8.2 7.6 3.2 29.8 9.6 5.8
Peakhurst Golf Club - - - - 17.0 6.0 1.0 - - - 6.0 - - - - 26.0 13.0 - - - - - 2.0 1.0 11.0 11.0 4.0 21.0 10.0 22.0
Randwick Bowling Club 2.0


9.4 2.0 0.8


10.8



43.4 13.4




»» 17.8 »» 32.8 4.2 27.0 12.2 25.8
Riverview Observatory 1.8 - - - 16.8 3.8 1.2 - 0.2 - 10.4 0.6 - 0.2 - 43.8 25.7 0.2 - - - - 3.4 4.0 11.0 10.1 2.0 41.0 13.0 10.2
Rose Bay (Royal Sydney Golf Club) 0.6


10.0 4.4



7.4



26.2 16.2




17.2 7.2 38.0 12.0 1.8 23.2 3.2
Sans Souci (Public School) - - - - 18.0 2.0 5.0 - - - 4.0 - - - - 66.0 14.0 - - - - - 8.0 3.0 14.0 9.0 11.0 18.0 21.0 19.0
St Ives (Richmond Avenue) 2.0


10.0 3.0 2.0


12.4



49.0 19.6 0.2



2.0 2.2 11.0 11.2 5.0 26.2 9.6 7.8
Strathfield Golf Club 5.0 - - - 12.0 3.0 1.0 - 1.0 1.0 6.0 - 1.0 - - 33.0 24.0 - - - - - 2.0 3.0 6.0 4.0 2.0 27.0 17.0 23.0
Sydney (Observatory Hill) 1.4 - - - 21.2 0.8 0.6 - - - 9.8 0.4 - - - 56.8 18.0 - - 0.2 - - 8.0 5.0 18.2 7.2 3.0 31.4 11.2 13.0
Sydney Airport AMO 1.4 0.2 - - 18.8 8.2 5.6 - - - 6.6 - - - - 38.2 19.2 - - - - - 4.0 12.8 4.6 3.0 4.2 28.6 15.6 31.2
Sydney Olympic Park (Sydney Olympic Pk A 2.4 - - - 9.4 1.6 1.8 - - - 7.2 0.2 - - - 30.4 24.4 0.2 - - - - 0.6 2.2 5.4 4.2 2.2 35.2 13.8 16.2
Terrey Hills AWS 0.8 0.2 - - 12.6 2.0 5.8 - - - 10.8 - -
- 34.2 25.8 - -
- - 3.6 3.2 6.6 20.6 6.8
7.6 6.8
Turramurra (Kissing Point Road) 1.8


16.6 2.6 6.0


12.0



41.6 18.6 0.2



0.8 2.8 14.0 14.6 3.2 20.0 10.0 5.2
West Pymble (Wyuna Road)























13.8 12.6 3.0 32.6 10.2 6.2
Metropolitan (West) (67)123456789101112131415161718192021222324252627282930
Abbotsbury (Fairfield City Farm) - - - - 2.0 2.0 1.0 - - - 5.0 - - - - 14.0 10.0 - - - - - - - 4.0 7.0 5.0 2.0 5.0 5.0
Badgerys Creek AWS - 0.2 - - 0.2
0.4 - - - 1.0 - - - - 3.2 3.4 0.2
0.2 - - - - 1.6 3.6 2.0 0.4 7.6 3.0
Baulkham Hills (Swimming Pool ) 0.5 - - - 8.0 2.0 0.5 - - - 10.0 - - - - 15.5 35.5 - - 0.5 - - - 1.5 7.0 7.0 1.5 18.0 8.0 6.0
Baulkham Hills Eucalyptus Ct 1.0 - - - 11.0 2.0 2.5 - - - 10.0 - - - - 15.0 27.0 - - - - - - 0.5 6.5 6.0 2.5 23.5 12.0 4.0
Berowra (Goodwyn Road)



9.0 2.0



10.0



26.4 31.4




0.8 1.4 7.4 14.8
14.8 13.4 4.6
Blacktown (Dog Pound) 0.5 - - 1.0 3.5 1.5 0.5 - - - 8.5 - - - - 11.0 13.0 - - - - - - - 4.0 4.0 3.0 7.0 11.5 13.0
Box Hill (Hynds Road) - - - - 5.0 1.0 - - - - 11.0 - - - - 6.0 19.0 - 3.0 - - - - 1.0 4.0 4.0 2.0 9.0 5.0 3.0
Castle Hill (Kathleen Ave)



8.6
2.6 0.2

11.2

0.2
14.5 38.4



0.2
2.0 7.4 9.4 2.8 17.6 7.6 6.2
Glenorie (Old Northern Rd)



6.4




14.0



23.0 13.4





2.0 7.0 5.4 3.0 16.2 5.4 5.0
Greystanes (Cumberland Golf Club) 0.5 - - - 5.5 1.5 0.5 1.0 - - 7.5 - - - - 11.5 19.5 - - - - - - - 5.0 6.5 2.0 11.0 13.5 17.5
Hawkesbury River (Sackville Downstream) 2.5 - - - 0.5 - - - - - 10.5 - - - - - 29.5 - - - - - - 0.5 - 2.5 1.5 1.0 7.5 3.5
Horsley Park Equestrian Centre AWS - - - - 3.0 2.0 0.6 - - - 7.2 -
- - 10.2 13.6 - 0.2 - - - - - 5.2 5.2 6.2 1.8 5.0 7.0
Kelso Ck (Kelso Creek U/S Levee (Georges - - - - 7.0 3.5 - 0.5 - - 9.0 - - - - 15.0 14.0 0.5 - - - - - - 5.5 10.5 3.0 5.0 6.5 22.0
Kings Langley (NSW Soccer Federation) 0.5 1.0 - - 7.5 2.0 - - - - 9.5 - - - - 10.5 27.0 - - - - - - 0.5 4.0 7.0 2.5 17.0 9.0 5.0
Kings Langley (Solander Rd) 1.0 - - - 7.4 1.8 0.2 - - - 8.6 - - - - 11.4 29.4 - - - - - - 0.6 4.8 7.4 2.6 14.0 10.8 6.2
Liverpool (Michael Wenden Centre) - - - - - - - - - - 4.9 - - -
10.8 9.2 - - - - 0.2 - - »» »» 2.6 1.8 4.5 11.4
Lower Portland (Hawkesbury River) 0.6 0.2 - - 2.6 1.2 2.2 - - - 5.6 - - - - 13.6 31.2 - - - - - 0.2 0.8 0.6 5.8 3.2 7.2 10.2 3.6
Maroota (Tobruk) 1.0 0.4 - - 2.4 2.2 3.0 - 0.4 - 8.4 - - - - 16.2 42.6 0.2 0.2 0.2 - - 0.2 1.2 1.6 13.2 3.4 7.2 14.6 6.6
Merrylands (Welsford Street) 1.4


3.2 1.6








16.4 10.6






6.4 6.4 5.4 9.4 13.4 14.8
Merrylands West (Finlayson Creek) 1.5 - - 2.5 9.0 2.5 1.0 - - - 11.5 - - - - 16.5 27.0 - - - - - - - 9.5 14.0 3.5 18.5 20.5 16.5
North Parramatta (Burnside Homes) 0.5 0.5 - - 8.5 2.5 1.0 - - - 8.0 - - - - 19.5 25.5 - - - - - - 1.0 8.0 6.5 2.5 26.5 8.5 5.5
North Rocks (Muirfield Golf Club) 1.0 - - - 8.0 1.5 0.5 1.0 - - 11.0 0.5 - - - 21.5 40.5 - - - - - - 3.0 9.5 7.5 3.5 24.5 9.5 6.0
Northmead Bowling Club 0.5 - - - 7.5 2.0 1.5 - - - 8.0 - - - - 16.5 24.0 0.5 - - - - 0.5 0.5 6.0 7.0 2.5 24.5 11.5 4.5
Parramatta (Baulkham Hills West (Sierra 1.0 - - - 7.5 1.0 0.5 - - - 8.0 - - - - 12.0 27.5 - - - - - - 0.5 5.5 7.0 2.5 15.5 11.0 5.5
Penrith Lakes AWS - - 0.2 - - 2.8 - - - - 0.4 - - - - 3.0 6.4 - - 0.2
- - - 2.2 5.6 5.4 0.4 2.8 5.6
Prospect Reservoir 0.4 - - - 4.5 1.8 0.2 - - - 8.1 - - - - 12.6 14.6 - - - - - 0.4 - 5.0 7.0 6.8 8.8 14.0 12.2
Richmond RAAF 1.6 - - - 2.2 0.2 0.4 - - - 1.4 0.2 - - - 5.2 14.0 - - - - - - 0.2 3.0 5.8 5.0 3.4 4.0 2.0
Seven Hills (Radio FM 103.2) 0.5 - - - 5.0 2.0 1.5 - - - 7.5 0.5 - - - 10.0 17.5 - - - - - - - 3.5 6.0 3.0 7.5 9.0 11.0
Seven Hills (Collins St) 4.6


5.4 2.4 2.0


9.2



12.0 22.0





»» 5.4 6.4 5.2 9.6 11.0 11.4
South Creek (Elizabeth Drive) - - - - - 0.1 - - - - 0.1 - - - - 0.4 0.5 - - - - - - - 0.3 0.5 0.4 0.1 0.4 0.5
St Clair (Juba Close) - - - - - 1.0 - - - - 1.0 - - - - 3.0 7.0 - - - - - - - 2.0 4.0 2.0 1.0 3.0 7.0
Toongabbie Bowling Club 1.0 1.0 - - 5.5 1.5 0.5 - - - 8.0 - - - - 12.0 22.0 - - - - - - - 6.0 4.0 3.5 10.5 8.5 13.5
Toongabbie Ck (Redbank Road (Toongabbee 0.5 - - 0.5 7.5 2.5 2.0 - - - 7.0 0.5 - - - 14.0 25.0 - - - - - - 1.0 7.0 6.0 2.0 17.5 12.0 10.0
West Pennant Hills (Cumberland S F Alert 0.5 - - - 10.0 1.0 2.5 - - - 10.5 - - - - 16.5 37.5 - - - - - 0.5 2.5 9.0 11.5 2.5 19.5 8.0 5.0
Willmot (Resolution Ave)










- - - - 6.0 8.0 - - - - - - - 3.0 5.0 6.0 3.0 8.0 6.0
Windsor SWC (Hawkesbury River) 1.0 - - - 4.0 - 1.0 - - - 5.0 - - - - 8.0 26.0 - - - - - - - 6.0 11.0 1.0 1.0 9.0 3.0
Illawarra (68)123456789101112131415161718192021222324252627282930
Camden Airport AWS - - - - - 0.4 1.6 - - - 1.2 - - - - - - - - - 0.8 - - - 0.8 7.6 2.0 - 4.8 12.8
Camden Valley Golf Resort - - - - - 1.0 - - - - 2.0 - - - - 1.0 - - - - - - - - 2.0 5.0 - - 4.0 16.0
Campbelltown (Kentlyn (Georges River Roa - - - - 2.0 2.0 1.0 - - - 1.0 - - - - 6.0 3.0 - - - - - - - 3.0 - 1.0 2.0 4.0 20.0
Campbelltown (Mount Annan) - - - - - 1.0 1.8 0.2 - - 2.2 0.2 - - - - - - 0.2 - 0.2 - - - 1.8 6.6 0.4 - 3.4 16.8
Rossmore (South Creek) - - - - - 2.0 - - - - 1.0 - - - - 5.0 3.0 - - - - - - - 2.0 5.0 2.0 - 9.0 5.0

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 May 2011. 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