Climate of Sydney

The weather of the Sydney CBD is recorded at Observatory Hill.

The climate of Sydney is temperate,[1] having warm, sometimes hot summers and mild winters, with no extreme seasonal differences as the weather is moderated by proximity to the ocean.[2] More extreme temperatures are recorded in the inland western suburbs. Rainfall is spread evenly throughout the year, but is highest between March and June.[3] Sydney is Australia's southernmost city to be within the humid subtropical zone (Köppen Cfa).[4]

Sydney has 103.9 clear days annually,[5][6] with the monthly percent possible sunshine ranging from 53% in January to 72% in August.[7] Sydney receives around 30 thunderstorms per year.[6][8] Sydney would usually get dry heat, especially when temperatures soar over 30 °C (86 °F).[9][10] In some days, low pressure troughs would increase humidity and southerly busters would decrease temperatures later in the day.[11][12] In late autumn and winter, east coast lows can bring large amounts of rainfall.

Sydney experiences a urban heat island effect,[13] making certain parts of the city more vulnerable to extreme heat, particularly the west.[13] Efforts have been introduced to investigate and mitigate this heat effect, including increasing shade from tree canopies, adding rooftop gardens to high rise structures and changing pavement colour.[14][15] The El Niño Southern Oscillation plays an important role in determining Sydney's weather patterns: drought and bushfire on the one hand, and storms and flooding on the other. Sydney is prone to heat waves and drought, which have become more common in recent years.[16][17][18][19]

Seasons

Summer

Beaches are a common visits among residents and tourists alike in a Sydney summer (Bondi Beach).

The highest recorded maximum temperature at Observatory Hill was 45.8 °C (114.4 °F) on 18 January 2013 during a prolonged heat wave across Australia from early December 2012 to late January 2013.[20] The highest recorded minimum at Observatory Hill is 27.6 °C (81.7 °F).[6] In the Sydney central business district, an average of 14.9 days a year have temperatures of more than 30 °C (86 °F) and 3.0 days with temperatures over 35 °C (95 °F).[6] In contrast, western suburbs such as Liverpool and Penrith have 41.4 and 67.5 days of temperatures above 30 °C (86 °F), 10.2 and 19.0 days above 35 °C (95 °F), and, 1.2 and 3.9 days above 40 °C (104 °F), respectively.[21][22]

The western suburbs are significantly hotter than the Sydney CBD by 2–5 °C (4–9 °F). In extreme occasions, the coast would have a temperature of 25 °C (77 °F) with a sea breeze, while a suburb 30 km (19 mi) inland bakes in 36 °C (97 °F) heat. At times, sea breezes do eventually reach the inland suburbs later in the day and would moderate the temperatures. Temperatures tend to be stable in late summer where they rarely go below 21 °C (70 °F) or over 40 °C (104 °F), unlike late spring and early summer where such extremities would occur.[6]

In late spring and summer, Sydney can sometimes get northwesterly winds from the Outback, which are dry and hot, making the temperatures soar above 38 °C (100 °F), with the relative humidity as low as 15%. This happens after the northwesterlies are carried entirely over the continental landmass, not picking up additional moisture from a body of water and retaining most of their heat. On these occasions, Sydney can experience the fury of the desert climate,[23] although they are often ended with a Southerly Buster, which is a cold front that sweeps up from the southeast abruptly cooling the temperature. At times, this cold front would bring thunderstorms, rainfall and gale winds.[24][25]

When temperatures reach over 30 °C (86 °F) in a summer afternoon, the relative humidity would rarely exceed 40%. Though most mornings and nights would still be humid, with the 9am relative humidity ranging from 69% to 75%.[6][21] The average 3pm dewpoint temperature in the summer ranges from 16.2 °C (61.2 °F) at the coast, to 14.4 °C (57.9 °F) inland. Due to moist easterlies, dewpoints would be higher in late summer, often reaching 19 °C (66 °F). Dewpoints as high as 21 °C (70 °F) are not unknown at that time. However, the air temperature seldom climbs above 28 °C (82 °F) when such high dewpoints occur.

Autumn leaves observed in Centennial Park, Sydney.

Autumn

Late summer conditions continue until the last few weeks of March, though nights may be cooler. Autumn weather starts at around April, when temperatures noticeably cool down. In April and May, average temperature highs would be around 24 °C (75 °F) and 19 °C (66 °F), respectively, with mild humid nights, rarely dipping below 10 °C (50 °F). Temperatures in autumn are usually consistent and stable, lacking any extremes that are experienced in other seasons (namely spring). Due to easterlies that prevail in this season, foggy mornings and overcast conditions should be expected. The average 9am relative humidity in autumn ranges from 72% to 80% in the Sydney region, the highest in the year.[6][21]

Winter

A foggy morning in a Sydney bushland.

In winter, the diurnal range in the western suburbs is relatively high, with temperatures being as high as 19 °C (66 °F) during the day and as low as 5 °C (41 °F) at nights. Such low temperatures may provide mild to moderate frost in the western suburbs.[26] Lows in the Sydney CBD rarely drop below 5 °C (41 °F), mainly due to proximity to the ocean.[6]

In the west, Liverpool and Richmond have 4.0 and 38.8 nights, respectively, where temperatures dip below 2 °C (36 °F). On average, only 1.0 night in Liverpool and 17.7 nights in Richmond have lows going below 0 °C (32 °F).[21] 9am humidity ranges from 61% to 74% across the Sydney region, with the more higher figures experienced in June mornings.[6][21]

Fog is common in winter mornings, namely in June when moist easterlies dominate. The western suburbs are more prone to fog than Sydney CBD. Highs of 14 °C (57 °F), whilst rare, are not unheard of in the winter. During late winter, dry westerly dominate resulting in extreme conditions, where maximum temperatures would go as high as 26 °C (79 °F) on some days.[27]

The lowest recorded minimum at Observatory Hill was 2.1 °C (35.8 °F) on 22 June 1932,[6] while the coldest in the Sydney metropolitan area was −8 °C (18 °F), in Richmond. The lowest recorded maximum temperature at Observatory Hill was 7.7 °C (45.9 °F).

Spring

Due to hot, dry westerlies, spring warmth begins in late August. Maximum temperatures in spring hover at around 20–27 °C (68–81 °F).[28] In general, spring tends to be mostly be sunny with warm days. Though the nights are relatively cool, where temperatures would plummet down to 8 °C (46 °F) in some suburbs. Hot air from the interior soaring temperatures to over 37 °C (99 °F) can expected springtime.[26]

Extreme, changeable and inconsistent temperatures are much more prevalent in spring than other seasons. In some occasions, hot searing days would be cooled down by a southerly buster, which eventually lower the temperatures from 40 °C (104 °F) to as low as 19 °C (66 °F).[29] Other seasons seldom see such fluctuations in a day's span. Furthermore, the diurnal range is higher in this season than it is in autumn.[6]

9am relative humidity is the lowest in the year during spring, ranging from 58% to 68%, with early spring receiving lower figures.[21]

Warm and cool periods

York Street during the September 2009 dust storm.

The Bureau of Meteorology has reported that 2002 through 2005 were the warmest summers in Sydney since records began in 1859. 2004 saw an average daily maximum temperature of 23.4 °C (74.1 °F), 2005 of 23.4 °C (74.1 °F), 2002 of 22.9 °C (73.2 °F), and 2003 of 22.7 °C (72.9 °F). The average daily maximum between 1859 and 2004 was 21.6 °C (70.9 °F). Seven (of the ten) warmest years on 151 years of record have occurred in the ten years between 2001 and 2010, with this decade being the warmest on record for minimum temperatures.[30][31]

The Bureau of Meteorology reported that the summer of 2007–08 was the coolest in 11 years, the wettest in six years, the cloudiest in 16 years, and one of only three summers in recorded history to lack a maximum temperature above 31 °C (88 °F).[32]

The Bureau of Meteorology reported that 2009 was a warm year. The average annual daytime temperature at Observatory Hill was 22.9 °C (73.2 °F), which is 0.9 °C (1.6 °F) above the historical annual average. This ranks as seventh highest annual average maximum temperature since records commenced in 1859.[33] 2010 was the equal fourth warmest year on record for Sydney, with an average maximum of 22.6 °C (72.7 °F), which was 0.6 °C (1.1 °F) above the historical annual average.

In 2013, the city had the warmest July and September on record,[34][35] with September being one of the driest. In September, temperatures were 4 °C (7 °F) above average[36] and the city had over seven days where temperatures reached 28 °C (82 °F), making it more similar to November's weather pattern.[37] October 2015 had the warmest nights on record, which were 3.3 °C (5.9 °F) above average.[38]

Precipitation

A summer thunderstorm over the city taken from Potts Point, 1991

Rainfall is fairly evenly spread through the year, with moderate to low variability. Precipitation is slightly higher during the first half of the year when easterly winds dominate (February–June), and lower in the second half (mainly July–September).[39][40] Due to the unpredictability of rain, the wettest and driest months would change in a yearly basis.[41] Within the city and surrounds, rainfall varies, from around 700 mm (27.56 in) at Badgerys Creek[42] (in the west) to 1,400 mm (55.12 in) at Turramurra (the northeast).[43]

Rain hours are longer in the winter than in the summer. In the warm months, rain comes in heavy downpours in the afternoons, usually cooling the conditions. Sometimes these afternoon showers would give away to the sun again. In the cool months, the rain is moderate and it would linger on for the whole day. In some days, rain may come in drizzle form.[6][21] Even in its months of highest rainfall Sydney has relatively few rainy days, on average less than 13 rainy days per month.[44]

In the cool months, Sydney CBD is more prone to rain than the inland suburbs, mainly due to the wonted east coast low that strikes between the months of May and August. The low would usually dump more rain in the CBD than the inland areas, usually by 20 mm (0.79 in) or more. Also in winter, thanks to onshore winds and Sydney's coastal proximity, the CBD would be susceptible to some light rain and drizzle – These conditions usually don't penetrate the inland suburbs. However, the western suburbs are more inclined to have heavy rain and thunder in the summer.[45]

The city is not affected by cyclones, although remnants of ex-cyclones do affect the city.[46] The city is prone to severe hail storms, such as the 1947 Sydney hailstorm, wind storms, and flash flooding from rain caused either by East Coast Lows (during autumn-winter periods) and ex-tropical cyclone remnants (during summer periods). East Coast Lows are low pressure depressions that can bring significant damage by heavy rain, cyclonic winds and huge swells. Scientists have predicted that rainfall will become more unpredictable and temperatures will be on the rise.[47][48]

Notable events

A boat at Rose Bay during the 1947 Sydney hailstorm

A notable event was the great Sydney flood which occurred on 6 August 1986 (unusual in that month) and dumped a record 327.6 mm (12.90 in) on the city in 24 hours. This caused major traffic problems and damage in many parts of the metropolitan area.[49] The next notable event was the 1999 hailstorm, which caused severe damage in many suburbs. The storm produced hailstones of up to 9 cm (3.5 in) in diameter and resulted in insurance losses of around A$1.7 billion in less than five hours.[50]

In February 2010, Sydney received some of the highest rainfalls in 25 years with 65 mm (2.6 in) of rain falling in one night at Observatory Hill. In the first weeks of the month, some suburbs were hit by thunderstorms which brought heavy rain and gusty winds which cut out power and damaged homes.[51][52][53] The heavy rain was caused by remnants of ex-tropical Cyclone Olga and humid north-easterly winds feeding into the low pressure trough.[54][55] 2010 was an overly wet year with the cloudiest October and the third cloudiest July on record. In 2011, Sydney recorded its wettest July since 1950. The CBD recorded 244 mm (9.61 in) of rain that month. 2011 was also the wettest year since records began in 1858.[56]

The aftermath of the April 1999 hailstorm.

In November 2013, a tornado hit Hornsby, a suburb in the Upper North Shore. The tornado's path was 2 km (1.2 mi) long and 50 m (160 ft) wide. The tornado blew off roofs and toppled large trees. The winds in the tornado reached 140 kilometres per hour (87 mph).[57][58]

On 14 October 2014, a rainstorm described as a "once-in-a-decade event" hit the Sydney region. Parts of Sydney received the heaviest amount of rain in a span of hours in decades. 94 mm (3.70 in) of rain fell in Strathfield in just over three hours. The winds were cyclonic in nature, with Sydney Airport having over 107 km/h (66 mph) gusts, reaching category 1 strength. This event happened due to the formation of an east coast low, which ignited several other low pressure systems.[59]

On 20 April 2015, Sydney recorded 119.4 mm (4.70 in) of rainfall, the most in any day since February 2002. Winds were "cyclonic" in nature, reaching 135 km/h (84 mph). This east coast low was formed with "a really pronounced upper level trough of cold air that had moved in from Victoria", Mr Sharpe said.[60] The maximum temperature was only 15.4 °C (60 °F), making it the coldest April day since 1983, according to BOM.[61]

Snowfall

Snow was last reported in the Sydney area in 1836. T. A. Browne, who kept weather observations, noted that "the years 1836, 1837 and 1838 were years of drought, and in one of these years (1836) a remarkable thing happened. There was a fall of snow; we made snowballs at Enmore and enjoyed the usual schoolboy amusements therewith". The Sydney Herald reported on the same incident, saying, "for the first time in the memory of the oldest inhabitants, snow fell in Sydney on the morning of Tuesday last. 27 June 1836, about 7 o'clock in the morning, a drifting fall covered the streets nearly one inch in depth."[62] A July 2008 fall of graupel, or soft hail, mistaken by many for snow, has raised the possibility that the 1836 event was not snow.[63]

Wind

Averaging at 13.8 km/h (8.6 mph), November is the windiest month, whilst March is the calmest at 11.3 km/h (7.0 mph).[6] The prevailing wind is northeasterly. In the warm months, only 40% of the time Sydney would get wind directions from the northwest or southwest, which are the dry winds flown from the heated interior of Australia.[64]

Northeasterlies and easterly sea breezes are dominant in late spring to early autumn. Westerlies are dominant in late winter to mid-spring. Southerly busters are expected from November to the end of February. They typically look like as if a sheet of cloud is rolled up like a scroll by the advancing wind. The change of wind (in the warm months) is sometimes very sudden, where it may be fresh northeasterly and in ten minutes a southerly gale.

When the subtropical ridge is north of Sydney in the second half of the year (spring), the wind would come from the west or inland. As the ridge moves south in late summer and autumn, the winds become easterly and, because they are coming off the Tasman Sea, they are moist. It is usually at this time of the year (autumn to early winter) where rainfall would be the highest.[65][66]

Drought

Smoke from bushfires around Sydney, January 1994

Sydney's climate appears to be becoming drier; The city has had fewer rain days in recent years than shown in the long-term climate table above. In summer, Sydney can go for long periods without rainfall. The other phenomenon that arises from these long, dry and hot periods is bushfires, which occur frequently in the areas surrounding the city. Water supply is a recurring concern for the city during drought periods.

In 2005 the reservoirs reached an all-time low. However, water levels since then have recovered in 2013. The years 2009 and 2010 had dry conditions, according to Bureau of Meteorology.[67] On 23 September 2009, a dust storm that started in South Australia and inland New South Wales blanketed the city with reddish orange skies.[68] It stretched as far north as southern Queensland and it was the worst dust storm in 70 years.[69] During that year, Sydney experienced a number of warm winter days, dry gusty winds and another milder dust storm.[70][71]

The Sydney Harbour Bridge shrouded in dust. September 2009

In 2011, Sydney had the driest February in 30 years with only 18 mm (0.71 in) of rain falling, which is well below than the average 118 mm (4.6 in). Some of the western suburbs recorded the lowest total February rainfall on record.[72] In September 2013, the combination of dry weather, warm temperatures and strong winds brought early-season bushfires. Major bushfires impacted western Sydney and the Blue Mountains, resulting in some evacuations, closed roads, and destroyed homes.[35]

The summer of 2013-14 was the driest in 72 years. The precipitation of December 2013 and January 2014, inclusively, only added up to 48.4 mm (1.91 in), which is only a quarter of a typical amount for December and January. Observatory Hill only received 17 mm (0.67 in) of rain in January.[73]

Many areas of the city bordering bushland have experienced bushfires, notably in 1994 and 2001–02 — these tend to occur during the spring and summer. Heatwaves, which are regularly occurring in recent years, would usually lead to water restrictions and a high risk of bushfires, which sometimes bring a smoky haze to the city. Smog is noticeable in hot days, even without bushfires.[74][75][76]

Aboriginal seasons

The Sydney Basin was in the Tharawal country. Each clan had knowledge of their area and the season changes. These were the seasons of the Sydney region according to the Aboriginal people living there:[77]

Climate data

Climate data for Sydney (Observatory Hill)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 45.8
(114.4)		 42.1
(107.8)		 39.8
(103.6)		 34.2
(93.6)		 30.0
(86)		 26.9
(80.4)		 25.9
(78.6)		 31.3
(88.3)		 34.6
(94.3)		 38.2
(100.8)		 41.8
(107.2)		 42.2
(108)		 45.8
(114.4)
Average high °C (°F) 25.9
(78.6)		 25.8
(78.4)		 24.8
(76.6)		 22.4
(72.3)		 19.5
(67.1)		 17.0
(62.6)		 16.3
(61.3)		 17.8
(64)		 20.0
(68)		 22.1
(71.8)		 23.6
(74.5)		 25.2
(77.4)		 21.7
(71.1)
Average low °C (°F) 18.7
(65.7)		 18.8
(65.8)		 17.6
(63.7)		 14.7
(58.5)		 11.6
(52.9)		 9.3
(48.7)		 8.1
(46.6)		 9.0
(48.2)		 11.1
(52)		 13.6
(56.5)		 15.7
(60.3)		 17.5
(63.5)		 13.8
(56.8)
Record low °C (°F) 10.6
(51.1)		 9.6
(49.3)		 9.3
(48.7)		 7.0
(44.6)		 4.4
(39.9)		 2.1
(35.8)		 2.2
(36)		 2.7
(36.9)		 4.9
(40.8)		 5.7
(42.3)		 7.7
(45.9)		 9.1
(48.4)		 2.1
(35.8)
Average rainfall mm (inches) 101.6
(4)		 117.6
(4.63)		 129.2
(5.087)		 128.6
(5.063)		 119.9
(4.72)		 131.9
(5.193)		 97.0
(3.819)		 79.8
(3.142)		 68.3
(2.689)		 76.7
(3.02)		 83.9
(3.303)		 77.6
(3.055)		 1,212.6
(47.74)
Average rainy days 12.2 12.5 13.6 12.8 13 12.5 11.1 10.4 10.5 11.6 11.7 11.5 143.8
Average relative humidity (%) 62 64 62 59 57 57 51 49 51 56 58 59 57
Mean monthly sunshine hours 235.6 202.4 213.9 207.0 195.3 177.0 204.6 244.9 237.0 244.9 228.0 244.9 2,635.5
Mean daily sunshine hours 7.6 7.1 6.9 6.9 6.3 5.9 6.6 7.9 7.9 7.9 7.6 7.9 7.21
Source #1: Bureau of Meteorology[6]
Source #2: Bureau of Meteorology, Sydney Airport (sunshine hours)[78]

Sea temperatures average 21 °C (70 °F) and range between 19 °C (66 °F) in July and 24 °C (75 °F) in January.

See also

References

  1. ↑ "Sydney Basin - climate". New South Wales Government. Department of Environment and Climate Change. Retrieved 21 December 2008.
  2. ↑ "Australian climatic zones". Australian Government. Bureau of Meteorology. Archived from the original on 5 July 2008. Retrieved 21 December 2008.
  3. ↑ "Climate and the Sydney 2000 Olympic Games". Australian Government. Australian Bureau of Statistics. 24 September 2007. Retrieved 21 December 2008.
  4. ↑ "Modelling and simulation of seasonal rainfall" (PDF). Centre for Computer Assisted Research Mathematics and its Applications (CARMA). 20 May 2014. Retrieved 25 February 2016. Brisbane and Sydney each have a humid sub-tropical or temperate climate with no pronounced dry season...the classification is Cfa
  5. ↑ "Weather in Sydney". Weather in Sydney. Tourism Australia 2014. Retrieved 1 November 2014.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 "Sydney (Observatory Hill)". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 6 June 2015.
  7. ↑ "Climate statistics for Australian locations Sydney Airport AMO". Bureau of Meteorology.
  8. ↑ "About East Coast Lows". Bureau of Meteorology. Retrieved 6 April 2013.
  9. ↑ "Hot Enough? Things are going to get hotter". The Sydney Morning Herald. 2014. Retrieved 30 October 2014.
  10. ↑ "Sydney heatwave". Daily Liberal. 2013. Retrieved 4 February 2014.
  11. ↑ "Sea Breezes on the NSW Coast". BOM. Ken Batt. Retrieved 12 November 2014.
  12. ↑ Batt, K, 1995: Sea breezes on the NSW coast, Offshore Yachting, Oct/Nov 1995, Jamieson Publishing.
  13. 1 2 "Sydney area an 'urban heat island' vulnerable to extreme temperatures". The Sydney Morning Herald. 14 January 2016. Retrieved 14 January 2016.
  14. ↑ "Urban heat island effect - City of Sydney". City of Sydney.com. Retrieved 14 January 2016.
  15. ↑ "Cooling cities - urban heat island effect" (PDF). aila.org.au. 2013. Retrieved 14 January 2016.
  16. ↑ "Sydney heatwave: Is it hot enough for you?". The Sydney Morning Herald. 10 October 2013. Retrieved 23 January 2014.
  17. ↑ "Living in Sydney". Sydney Institute of Business & Technology. Archived from the original on 8 August 2008. Retrieved 21 December 2008.
  18. ↑ "Water quality and drought". Sydney Water. Archived from the original on 2009-11-20.
  19. ↑ "Drought". Archived from the original on 2012-01-15.
  20. ↑ "Special Climate Statement 43 – extreme heat in January 2013" (PDF). Bureau of Meteorology. 1 February 2013. Retrieved 2 February 2013.
  21. 1 2 3 4 5 6 7 8 "Liverpool". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 15 November 2014.
  22. ↑ "Climate statistics for Penrith Lakes". Bureau of Meteorology. Retrieved 21 Feb 2015.
  23. ↑ Heatwave blows in on a fiery desert wind
  24. ↑ Sydney Weather
  25. ↑ Southerly buster
  26. 1 2 Sydney’s Climate
  27. ↑ Evans, J. P., Ji, F., Lee, C., Smith, P., Argüeso, D., and Fita, L. (2014) A regional climate modelling projection ensemble experiment – NARCliM, Geoscientific Model Development, 7(2), 621-629, doi: 10.5194/gmd-7-621- 2014.
  28. ↑ in August 2013: Warm, dry, sunny end to winter
  29. ↑ Climate Change in the Sydney Metropolitan Catchments
  30. ↑ Sydney in 2010: 18th consecutive warm year
  31. ↑ Special Climate Statement 27 - An exceptional summer heatwave in greater Sydney and the Hunter Valley.
  32. ↑ Sydney has coolest summer in 11 years in Sydney Climate Summary — NSW Regional Office, Bureau of Meteorology. Retrieved 25 March 2008.
  33. ↑ Year 2009: Very warm with below average rainfall in Sydney
  34. ↑ Sydney in July 2013: Warmest July on record
  35. 1 2 Sydney in September 2013: Warmest September on record
  36. ↑ Climate Council reports warmest September on record
  37. ↑ September’s average temperature for Sydney beats 33-year-old record
  38. ↑ October blew away heat records for any month of any year: Bureau of Meteorology
  39. ↑ Climate of Sydney Australia the Good and the Bad
  40. ↑ Australia > New South Wales > Sydney
  41. ↑ "Climate statistics for Bankstown Airport". Bureau of Meteorology. Retrieved 13 April 2013.
  42. ↑ "Badgerys Creek AWS". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 19 January 2014.
  43. ↑ Ku-ring-gai Historical Society. "Turramurra".
  44. ↑ "The Lost Seasons".
  45. ↑ Storm hits Sydney after scorching day of hot weather
  46. ↑ Tropical Cyclones in New South Wales
  47. ↑ < "Weather & climate". Retrieved 25 December 2014.
  48. ↑ East Coast Lows
  49. ↑ Rain in Sydney, 1986 in Australian Climate Extremes, Bureau of Meteorology. Retrieved 9 September 2006.
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  51. ↑ "Storm drenches Sydney". UPI.com. 12 February 2010. Retrieved 2010-06-01.
  52. ↑ "Sydney dries out but regional threatened". News.smh.com.au. 12 February 2010. Retrieved 2010-06-01.
  53. ↑ "Weather News - Wild storms lash Sydney". Weatherzone.com.au. 13 February 2010. Retrieved 2010-06-01.
  54. ↑ "Rain swamps Sydney's water catchments". Smh.com.au. 7 February 2010. Retrieved 2010-06-01.
  55. ↑ Huffer, Julie (2010-02-10). "Heaviest rain in almost 20 years - Environment - News | Hornsby & Upper North Shore Advocate". Hornsby-advocate.whereilive.com.au. Archived from the original on 2013-01-20. Retrieved 2010-06-01.
  56. ↑ Sydney records its wettest July in 50 years as parts of NSW are declared disaster zones
  57. ↑ Clean-up continues after tornado strikes at Hornsby in Sydney's north
  58. ↑ "Hornsby was hit by a tornado, Bureau of Meteorology confirms". The Sydney Morning Herald.
  59. ↑ "'Once every 100 years': what made the Sydney storm so ferocious". The Sydney Morning Herald. 15 October 2014.
  60. ↑ Sydney weather: It's not a cyclone but it sure felt like one
  61. ↑ NSW wild weather: Three killed, homes washed away in Dungog as 'cyclonic' winds batter Sydney, Hunter and Central Coast
  62. ↑ MacDonnell, Freda. Thomas Nelson (Australia) Limited, 1967. Before King's Cross
  63. ↑ "Sydney weather hail, not snow". AAP. 27 July 2008. Archived from the original on 2009-01-06. Retrieved 2008-08-11.
  64. ↑ Wind & weather statistics Botany Bay/Sydney Airport
  65. ↑ Sydney weather: fog shrouds city before the sun finally emerges
  66. ↑ Sydney weather: Planes diverted, ferries cancelled as city blanketed in fog
  67. ↑ "Year 2009: Very warm with below average rainfall in Sydney". Bom.gov.au. 4 January 2010. Retrieved 2014-01-19.
  68. ↑ Ramachandran, Arjun (23 September 2009). "Sydney turns red: dust storm blankets city". The Sydney Morning Herald.
  69. ↑ Brisbane on alert as dust storms sweep east
  70. ↑ "Sydney in Autumn 2010". Bom.gov.au. Retrieved 2010-06-01.
  71. ↑ "Third warmest winter on record for Sydney". Bom.gov.au. 27 August 1995. Retrieved 2010-06-01.
  72. ↑ Sydney in January 2011: Warm start to 2011
  73. ↑ "Sydney in midst of driest summer for more than 70 years". The Sydney Morning Herald. 3 February 2014. Retrieved 2015-01-28.
  74. ↑ The Best Time to Visit Sydney - Summer
  75. ↑ "Sydney climate and weather averages". Weather2Travel. 2014. Retrieved 5 October 2014.
  76. ↑ "Bondi Beach water temperature". Meteo365.com. 2013. Retrieved 5 October 2014.
  77. ↑ "Indigenous Weather Knowledge". Bom.gov.au. Retrieved 2014-12-09.
  78. ↑ "Climate statistics for Australian locations Sydney Airport AMO". Bureau of Meteorology.
  79. ↑ "Sydney Airport AMO". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 3 December 2014.
  80. 1 2 3 4 5 6 "Definitions for rainfall". Bureau of Meteorology. Retrieved 15 November 2014.
  81. ↑ "Canterbury Racecourse". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 15 November 2014.
  82. ↑ "Parramatta". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 15 November 2014.
  83. ↑ "Penrith". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 15 November 2014.
  84. ↑ "Camden Airport AWS". Climate statistics for Australian locations. Bureau of Meteorology. Retrieved 15 November 2014.

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