Thursday, 1 October 2009 - Monthly Climate Summary for Sydney - Greater Sydney - Product code IDCKGC25L0
Dry, with record high temperatures in Sydney during September
- Equal highest average mean temperature (average of maximum and minimum)
- Equal 2nd highest average maximum temperature on record
- Highest average minimum temperature on record
- Very dry; below average rainfall and relative humidity
- High incidence of strong westerly winds
- Major duststorm on 23rd, worst for 67 years
- Sunny month with many clear days
An archive of previous monthly summaries for Sydney - Greater Sydney is also available, as are summaries for other states and many other climate summaries and diagnostics.
Jump to: Extremes Records Summaries Notes the top
Rainfall
After a dry August, very dry conditions continued throughout Sydney during September. Observatory Hill had a total rainfall of only 16.0 mm, which is well below the historical September average of 69.4 mm. This ranks as the 19th driest September out of 152 years of record at Observatory Hill. The rain fell on only 4 days, which is well below the average of 11 rain days. The entire metropolitan area recorded below average rainfall. Slightly higher totals occurred in the SW with lower totals along the coast and over the northern metropolitan. Monthly totals ranged from 34.6 mm at Campbelltown to only 4.2 mm at Richmond. A thunderstorm on the 22nd produced 16 mm at Sydney Olympic Park, the highest daily rainfall in the metropolitan area during September.
The lack of any significant rainfall was mainly due to the continuing prevailing and dry W-NW winds throughout the month with a low incidence of rain bearing systems. Except for a few weak afternoon sea breezes there was virtually a complete lack of onshore winds. At some sites the prevailing W-NW wind occurred up to 77% of the time, well above the normal frequency of 53% at 9am. These conditions also produced very low humidity levels throughout Sydney with a monthly average at 3pm of 44% at Observatory Hill, the 5th lowest for September over the past 55 years of humidity records. The historic average at this time is 51%.
Dry conditions also prevailed over the lower Warragamba Dam catchment. However, the upper catchment (near Goulburn) received falls of up to 60 mm for the month. The dry weather caused Sydney's storage level to fall by 1% during September and is currently around 58% of capacity. Recent rainfall and current levels in Sydney's water catchments can be found on the Sydney Catchment Authority web site http://www.sca.nsw.gov.au/dams/rainfall.html
Some sites had their lowest total September rainfall on record.
Some sites had their lowest total September rainfall for at least 20 years.
Temperatures
Sydney experienced its equal hottest September on record. The average mean temperature (average of maximum and minimum) was 18.3° which is 2.8°C above the historic mean average and the same as the year 2006. Daytime temperatures were well above average with many warm days and the occasional hot day. Observatory Hill recorded an average maximum temperature of 23.1°C, which is a significant 3.2°C above the historical September average. This is Sydney's equal 2nd highest average maximum temperature for September in the 151 year record with identical average maximums also recorded in 1928 and 2006. Sydney's warmest September was in 1980 (23.3°C)
Observatory Hill recorded 2 hot days (maximum temperature greater than 32°C) during the month. This has occurred only once before, in 2008 (records since 1859). Days over 32°C are rare in September; with a typical occurrence of once in every 10 years. However, the frequency of hot days in September has rapidly increased recently, with 32°C being exceeded 7 times in the last decade.
Plentiful sunshine, prevailing W-NW winds and the lack of any significant cool changes contributed towards the warm conditions. The above average temperatures in Sydney are consistent with warmer than average conditions experienced across eastern and northern Australia during September. An El Niño) event is currently maturing in the equatorial Pacific Ocean. These events are usually (but not always) associated with above average temperatures in eastern Australia. Very high temperatures experienced throughout August and September are likely due to the current influence of El Niño) combined with the background, long-term warming that has been observed across Australia since the start of last century.
Very mild nights were also experienced throughout the metropolitan area during the month with Sydney Observatory Hill recording its highest average minimum temperature on record for September. The average minimum of 13.5°C was 2.5°C above the historic average. The previous highest was 13.4°C in 1998 and 2006. There were 13 mild nights in Sydney (minimum 14°C or higher), equal to the highest number recorded in 1998. The normal frequency for September is 4 nights above 14°C.
The particularly high minimums around Sydney is partly due to persistent, warm W-NW winds and a slight warming effect at night (Foehn wind effect) as prevailing westerly winds descended over the Sydney basin.
There was significant variation in temperatures over the Sydney region during September, with extremes ranging from a high of 33.2°C at Liverpool and Sydney Airport on the 17th to a low of 2.0°C at Camden Airport AWS on the 10th and 11th and 2.0°C at Campbelltown on the 11th.
Some sites had their highest September mean daily maximum temperature for at least 20 years.
Some sites had their highest September mean daily minimum temperature on record.
Wind
There was a significantly higher than normal incidence of winds from the W-NW winds during September with frequencies around 77% at Sydney Airport during the mornings (normal frequency 53%). Over half the daily maximum gusts at the airport were also from this direction with the highest gust of 81 km/hr (from west) on the 23rd. The highest gust in the Metropolitan area was WNW at 85 km/hr at Richmond on the 7th.
Other phenomena
A major duststorm with strong winds hit Sydney during the morning of the 23rd producing a blood red sky and reducing visibility to 400 metres over much of the city. A thick layer of red dust coated all exposed surfaces with many flights delayed or cancelled at Sydney Airport. The dust, originating from South Australia and western NSW, was the worst duststorm in Sydney since 1942. A few days later, strong winds again caused raised dust on the 26th reducing visibility to 4 km at 6am.
Observatory Hill recorded 2 thunderstorms on the 7th and 22nd with a third storm passing over northern suburbs on the 20th. Small hail (1 cm) was reported with all 3 storms in various suburbs with hail up to 2 cm at Hornsby on the 22nd. Sunshine averaged 8.8 hours per day, the highest since 2002 and well above the historical average of 7.9 hours per day.
Further information
Mike De SalisClimate Monitoring Officer
NSW Climate Services Centre
NSW Regional Office
Bureau of Meteorology
Phone (02) 9296 1555
Email climate.nsw@bom.gov.au
Extremes for the Sydney area
| Hottest day Highest temperature |
33.2°C at Liverpool and Sydney Airport on the 17th |
|---|---|
| Warmest days on average Highest mean daily maximum temperature |
24.9°C at Penrith Lakes AWS |
| Coolest days on average Lowest mean daily maximum temperature |
21.8°C at Terrey Hills AWS |
| Coldest day Lowest daily maximum temperature |
15.4°C at Springwood on the 27th |
| Coldest night Lowest temperature |
2.0°C at Camden Airport AWS on the 10th and 11th 2.0°C at Campbelltown (Mount Annan) on the 11th |
| Coolest nights on average Lowest mean daily minimum temperature |
7.5°C at Camden Airport AWS |
| Warmest nights on average Highest mean daily minimum temperature |
13.5°C at Sydney (Observatory Hill) |
| Warmest night Highest daily minimum temperature |
19.0°C at Sydney (Observatory Hill) on the 18th |
| Wettest overall Highest total rainfall |
34.6 mm at Campbelltown (Mount Annan) |
| Driest overall Lowest total rainfall | 4.2 mm at Richmond RAAF |
| Wettest day Highest daily rainfall |
16.0 mm at Sydney Olympic Park on the 23rd |
| Highest wind gust |
85 km/h at Richmond RAAF on the 7th |
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Records
| Lowest total September rainfall for at least 20 years | |||||
|---|---|---|---|---|---|
|
Total rainfall for September 2009 (mm) |
Most recent lower for September |
Years since lower |
Average for September |
||
| Rose Bay | 7.8 | 1.0 | in 1989 | 20 | 72.2 |
| Highest September mean daily maximum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Mean daily maximum temperature for September 2009 (°C) |
Most recent higher for September |
Years since higher |
Average for September |
||
| Sydney Airport | 23.5 | 24.0 | in 1980 | 29 | 20.4 |
| Record highest September mean daily minimum temperature | |||||
|---|---|---|---|---|---|
|
Mean daily minimum temperature for September 2009 (°C) |
Previous highest for September |
Years of record |
Average for September |
||
| Sydney (Observatory Hill) | 13.5 | 13.4 | in 2006 | 150 | 11.0 |
| Parramatta | 10.7 | = 10.7 | in 1986 | 41 | 9.3 |
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Summaries for the Sydney area
This table is very wide and may not fit if printed.
| Summary statistics for September 2009 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures for September (°C) |
Minimum temperatures for September (°C) |
Rainfall for September (millimetres) |
||||||||||
| Mean for September 2009 |
Diff from average |
Highest for September 2009 |
Mean for September 2009 |
Diff from average |
Lowest for September 2009 |
Total for September 2009 |
Average for September |
Rank of September 2009 |
Fraction of September average |
|||
| Sydney (Observatory Hill) | 23.1 | +3.2 | 32.2 | 13th | 13.5 | +2.5 | 9.5 | 11th | 16.0 | 69.1 | low | 23% |
| Bankstown Airport AWS | 23.5 | +2.1 | 32.5 | 17th | 9.5 | +0.9 | 4.2 | 10th | 16.4 | 44.6 | low | 37% |
| Camden Airport AWS | 23.6 | +1.8 | 32.8 | 17th | 7.5 | +0.8 | 2.0 | 10th | 34.4 | 39.5 | average | 87% |
| Parramatta | 23.8 | +2.3 | 32.0 | 17th | 10.7 | +1.4 | 6.1 | 11th | 23.6 | 53.7 | low | 44% |
| Penrith Lakes AWS | 24.9 | 33.1 | 17th | 9.3 | 4.2 | 11th | 13.8 | |||||
| Prospect Reservoir | 24.0 | +2.8 | 31.7 | 13th | 11.5 | +2.2 | 5.2 | 11th | 16.1 | 47.2 | low | 34% |
| Richmond RAAF | 23.9 | +2.4 | 32.1 | 17th | 8.6 | +3.0 | 2.1 | 11th | 4.2 | 39.5 | very low | 10% |
| Springwood | 22.7 | 31.2 | 17th | 10.4 | 6.1 | 11th | 17.8 | 55.8 | low | 32% | ||
| Sydney Airport | 23.5 | +3.0 | 33.2 | 17th | 13.0 | +2.7 | 8.7 | 11th | 21.6 | 61.2 | low | 35% |
| Terrey Hills AWS | 21.8 | 30.3 | 17th | 11.9 | 7.8 | 1st | 9.2 | |||||
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Daily rainfall for the Sydney region
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) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wisemans Ferry | - | - | - | 2.8 | 1.0 | 0.2 | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 0.6 | 0.2 | 0.8 | - | - | - | - | - | - | - |
| Central Tablelands (South) (63) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Sackville Ferry (Hawkesbury River) | - | - | - | 5.4 | 5.0 | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | - | - | 0.2 | 0.8 | 0.4 | - | - | - | - | - | - | - |
| Springwood | - | - | - | 5.0 | - | - | - | 0.6 | - | - | - | - | - | - | 0.4 | - | 0.2 | - | - | - | - | 0.4 | 10.8 | - | - | - | 0.4 | - | - | - |
| Valley Heights (Sun Valley Rd) | - | - | - | 4.8 | - | - | - | 0.4 | - | - | 0.6 | - | - | - | - | 0.6 | 10.8 | - | - | 0.6 | - | |||||||||
| Metropolitan (East) (66) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Auburn (Rosnay Golf Club) | - | - | - | 3.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 12.0 | - | - | - | - | - | - | - |
| Audley (Royal National Park) | - | - | - | 5.0 | - | - | - | 5.0 | - | - | - | - | - | - | - | - | - | - | - | - | 3.0 | 1.0 | 11.0 | - | - | - | - | - | - | - |
| Avalon (Wollstonecraft Ave) | - | - | - | 3.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - |
| Bankstown Airport AWS | - | - | - | 3.8 | 0.2 | - | - | 0.2 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 0.6 | 0.2 | 11.2 | - | - | - | - | - | - | - |
| Belrose (Evelyn Place) | 3.6 | 2.2 | 0.4 | 1.2 | ||||||||||||||||||||||||||
| Campbelltown (Ingleburn) | - | - | - | 7.0 | - | - | - | 3.0 | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | 13.0 | - | - | - | - | - | - | - |
| Canterbury Racecourse AWS | - | - | - | 3.0 | 0.2 | - | - | 3.8 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | - | 11.8 | 0.2 | - | - | - | - | - | - |
| Castle Cove (Rosebridge Ave) | 2.2 | 1.1 | 1.0 | |||||||||||||||||||||||||||
| Chatswood Bowling Club | - | - | - | 4.0 | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | - | - | - | - | - | - |
| Concord Golf Club | 5.0 | 5.6 | ||||||||||||||||||||||||||||
| Cronulla South Bowling Club | 6.4 | 1.6 | 0.6 | 7.0 | ||||||||||||||||||||||||||
| Guildford (Woodville Golf Club) | - | - | - | 3.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 14.0 | - | - | - | - | - | - | - |
| Holsworthy Control Range | - | - | - | 5.8 | 0.2 | - | - | 2.6 | 0.2 | - | - | - | - | - | - | - | 0.2 | - | - | - | 0.2 | - | 12.0 | - | - | - | - | - | - | - |
| Lidcombe (Carnarvon Golf Club) | - | - | - | 4.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 9.0 | - | - | - | - | - | - | - |
| Liverpool-Scrivener St (Georges River) | - | - | - | 4.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | 6.0 | - | - | - | - | - | - | - |
| Lucas Heights (ANSTO) | 5.8 | 8.8 | 0.6 | 1.4 | 11.0 | |||||||||||||||||||||||||
| Manley / Warringah (Allambie) | - | - | - | 2.5 | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | 1.5 | - | - | - | - | - | - | |
| Manley / Warringah (Belrose) | - | - | 2.5 | - | - | - | - | - | - | - | - | - | - | - | 2.0 | 1.0 | - | - | - | - | ||||||||||
| Marrickville Golf Club | - | - | - | 3.0 | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 12.0 | - | - | - | - | - | - | - |
| Milperra Bridge (Georges River) | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3.0 | - | 9.0 | - | - | - | - | - | - | - |
| Mona Vale Golf Club | - | - | - | 3.6 | - | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | 6.8 | 0.2 | 0.4 | - | - | - | - | - | - | - |
| Parramatta North (Masons Drive) | - | - | - | 5.6 | - | - | - | 5.0 | - | - | - | - | - | - | - | - | - | - | - | - | 2.6 | 0.4 | 10.0 | - | - | - | - | - | - | - |
| Randwick Bowling Club | 5.6 | 6.2 | 4.0 | |||||||||||||||||||||||||||
| Riverview Observatory | - | - | 0.1 | 4.4 | - | - | - | 3.8 | - | - | - | - | - | - | - | - | 0.2 | - | - | - | - | - | 4.6 | - | - | - | - | - | - | - |
| Rose Bay (Royal Sydney Golf Club) | 4.6 | 3.2 | ||||||||||||||||||||||||||||
| Sans Souci (Public School) | - | - | - | 5.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 6.0 | - | - | - | - | - | - | - |
| St Ives (Richmond Avenue) | 3.6 | - | 9.6 | 0.4 | ||||||||||||||||||||||||||
| Strathfield Golf Club | - | - | - | 3.0 | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 12.0 | - | - | - | - | - | - | - |
| Sydney (Observatory Hill) | - | - | - | 6.0 | - | - | - | 5.4 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | - | 4.4 | - | - | - | - | - | - | - |
| Sydney Airport | - | - | - | 4.4 | - | - | - | 6.2 | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | 10.0 | - | - | - | - | - | - | - |
| Sydney Olympic Park | - | - | - | 5.2 | 0.8 | - | - | 3.6 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 16.0 | - | - | - | - | - | - | - |
| Terrey Hills AWS | - | - | - | 3.2 | - | - | - | - | 0.2 | - | - | - | - | - | - | - | 0.2 | - | - | - | 5.2 | 0.2 | 0.2 | - | - | - | - | - | - | - |
| Turramurra (Kissing Point Road) | 4.2 | 0.6 | 8.6 | 0.6 | 1.6 | - | ||||||||||||||||||||||||
| West Pymble (Wyuna Road) | 4.0 | 1.0 | 6.0 | |||||||||||||||||||||||||||
| Metropolitan (West) (67) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Abbotsbury (Fairfield City Farm) | - | - | - | 4.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 6.0 | - | - | - | - | - | - | - |
| Badgerys Creek AWS | - | - | - | 7.6 | - | - | - | 5.0 | 0.2 | - | - | - | - | - | - | - | - | 0.2 | - | - | 1.0 | 0.2 | 12.6 | 0.2 | - | - | - | - | - | - |
| Baulkham Hills (Swimming Pool ) | - | - | - | 5.0 | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | 7.5 | 0.5 | 7.0 | - | - | - | - | - | - | - |
| Baulkham Hills Eucalyptus Ct | - | - | - | 5.5 | - | - | - | 1.5 | - | - | - | - | - | - | - | - | - | - | - | - | 7.0 | 0.5 | 10.5 | - | - | - | - | - | - | - |
| Berowra (Goodwyn Road) | 3.8 | 2.4 | ||||||||||||||||||||||||||||
| Blacktown (Dog Pound) | - | - | - | 3.5 | - | - | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | 0.5 | - | 9.0 | - | - | - | - | - | - | - |
| Box Hill (Hynds Road) | - | - | - | 3.0 | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | - | - | - | - | - | - | |
| Castle Hill (Kathleen Ave) | 5.4 | 1.4 | 11.0 | 0.5 | 6.4 | |||||||||||||||||||||||||
| Glenorie (Old Northern Rd) | 5.4 | 1.0 | 3.0 | |||||||||||||||||||||||||||
| Greystanes (Cumberland Golf Club) | - | - | - | 4.0 | - | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | - | 11.0 | - | - | - | - | - | - | - |
| Horsley Park Equestrian Centre AWS | - | - | - | 4.0 | 0.2 | - | - | - | 0.6 | 0.2 | - | - | - | - | - | - | - | 0.2 | - | - | 0.2 | - | 8.4 | - | - | - | - | - | - | - |
| Kelso Ck (Panania) | - | - | - | 5.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | 9.5 | - | - | - | - | - | - | - |
| Kings Langley (NSW Soccer Federation) | 0.5 | - | - | 5.0 | - | - | - | 1.5 | - | - | - | - | - | - | - | - | - | - | - | - | 10.0 | 1.0 | 8.0 | - | - | - | - | - | - | - |
| Kings Langley (Solander Rd) | - | - | - | 5.4 | - | - | - | 3.8 | - | - | - | - | - | - | - | - | 0.2 | - | - | - | 7.2 | 0.8 | 10.2 | - | - | - | - | - | - | - |
| Liverpool (Michael Wenden Centre) | - | - | - | 6.2 | - | - | - | 3.6 | - | - | - | - | - | - | - | - | 0.2 | - | - | - | 1.0 | - | 9.6 | - | - | - | - | - | - | - |
| Lower Portland (Hawkesbury River) | - | - | - | 4.8 | 1.4 | - | - | 1.4 | - | - | - | - | - | - | - | - | - | - | - | - | 4.8 | 1.0 | 1.0 | - | - | - | - | - | - | - |
| Maroota (Tobruk) | - | - | 0.2 | 6.0 | 1.0 | - | - | 0.2 | - | - | - | - | - | - | - | - | 0.4 | - | - | - | 2.4 | 1.4 | 0.6 | - | - | - | - | - | - | - |
| Merrylands (Welsford Street) | 5.4 | 13.8 | ||||||||||||||||||||||||||||
| Merrylands West (Finlayson Creek) | - | - | - | 3.5 | - | - | - | 0.5 | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | - | 10.5 | - | - | - | - | - | - | - |
| North Parramatta (Burnside Homes) | - | - | - | 4.5 | 0.5 | - | - | 4.0 | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | 9.0 | - | - | - | - | - | - | - |
| North Rocks (Muirfield Golf Club) | - | - | - | 7.5 | - | - | - | 1.5 | - | - | - | - | - | - | - | - | - | - | - | - | 7.0 | 0.5 | 12.5 | - | - | - | - | - | - | - |
| Northmead Bowling Club | - | - | - | 5.0 | 0.5 | - | - | 2.5 | 0.5 | - | - | - | - | - | - | - | - | - | - | - | 4.0 | - | 9.0 | - | - | - | - | - | - | - |
| Parramatta (Baulkham Hills West) | - | - | - | 5.0 | - | - | - | 4.0 | - | - | - | - | - | - | - | - | - | - | - | - | 6.5 | 0.5 | 9.5 | - | - | - | - | - | - | - |
| Penrith Lakes AWS | - | - | - | 4.0 | - | - | 0.2 | 0.2 | - | - | - | - | - | - | - | - | - | 0.2 | - | - | - | 0.2 | 9.0 | - | - | - | - | - | - | - |
| Prospect Reservoir | - | - | - | 4.0 | - | - | - | 0.6 | - | - | - | - | - | - | - | - | 0.1 | - | - | - | - | 0.1 | 11.3 | - | - | - | - | - | - | - |
| Richmond RAAF | - | - | - | 4.0 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Seven Hills (Radio FM 103.2) | - | - | - | 4.5 | 0.5 | - | - | 3.0 | - | - | - | - | - | - | - | - | - | - | - | - | 3.0 | 0.5 | 11.0 | - | - | - | - | - | - | - |
| Seven Hills (Collins St) | 5.8 | 4.0 | 7.2 | 12.6 | ||||||||||||||||||||||||||
| St Clair (Juba Close) | - | - | - | 4.0 | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 6.0 | - | - | - | - | - | - | - |
| Toongabbie Bowling Club | - | - | - | 5.0 | - | - | - | 4.5 | - | - | - | - | - | - | - | - | - | - | - | - | 4.0 | - | 12.0 | - | - | - | - | - | - | - |
| Toongabbie Ck (Redbank Road (Toongabbee | - | - | - | 5.0 | 0.5 | - | - | 5.0 | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | 12.5 | - | - | - | - | - | - | - |
| West Pennant Hills (Cumberland S F) | - | - | - | 4.5 | 0.5 | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | 8.5 | 0.5 | 6.0 | - | - | - | - | - | - | - |
| Illawarra (68) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Camden Airport AWS | - | - | - | 6.0 | - | - | - | 13.8 | - | - | - | - | - | - | - | - | - | - | - | - | 1.4 | - | 13.0 | - | - | - | 0.2 | - | - | - |
| Camden Valley Golf Resort | - | - | - | 1.0 | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | 4.0 | - | - | - | - | - | - | - |
| Campbelltown (Kentlyn) | - | - | - | 6.0 | - | - | - | 8.0 | - | - | - | - | - | - | - | - | - | - | - | - | 3.0 | - | 13.0 | - | - | - | - | - | - | - |
| Campbelltown (Mount Annan) | - | - | - | 6.0 | - | - | - | 9.8 | - | - | - | - | - | - | - | - | 0.2 | - | - | - | 4.2 | - | 14.4 | - | - | - | - | - | - | - |
| Rossmore (South Creek) | - | - | - | 7.0 | - | - | - | 8.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 11.0 | 1.0 | - | - | - | - | - | - |
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Notes
This statement has been prepared based on information available at 10 am on Thursday 1 October 2009. 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
Mike De SalisClimate Monitoring Officer
NSW Climate Services Centre
NSW Regional Office
Bureau of Meteorology
Phone (02) 9296 1555
Email climate.nsw@bom.gov.au