Tuesday, 1 March 2016 - Seasonal Climate Summary for Sydney - Product code IDCKGC25L0
Sydney in summer 2015-16: A stormy summer with a warm, dry end
Rainfall was above average in Sydney during summer, with several severe thunderstorms in December and January causing heavy rain and strong winds. Temperatures were above average, with both hot and cold spells early in the season followed by persistently warm, dry conditions during February.
- Most days with 25 mm of rain since summer 1989-90
- Tornado causes record high wind gust in December
- Most days above 30 °C since summer 2010-11
- Coldest January day since 1978
- Longest spell of days above 26 °C on record
Rainfall was generally above average during summer, and the wettest for Observatory Hill since 2007-08. The rain fell over 33 days, close to the average of 36 days, of which seven recorded at least 25 mm of rainfall. This is the most heavy rain days since summer 1989-90, and more than double the average of 3 days.
January was the wettest for Sydney since 1988, with several severe thunderstorms causing strong winds, heavy rain, and flash flooding in parts of the city. An East Coast Low caused heavy rain in early January, with a three-day total of 239 mm at Frenchs Forest. Several thunderstorms also impacted Sydney in December, with severe storms on the 16th causing major damage in southeastern Sydney including a tornado at Kurnell. A maximum wind gust of 213 km/h was recorded during this event, the strongest gust ever recorded in NSW. In contrast, February was dry across the Greater Sydney region, with only one day recording heavy rain anywhere in the city.
Both maximum and minimum temperatures were generally above average during the summer, particularly in eastern Sydney, with Observatory Hill recording its warmest summer mean maximum temperature since 2010-11. Daytime temperatures were above average across the city during December and February, while days were cooler than average in western Sydney during January. In total, there were 14 days above 30 °C during the season, the most since summer 2010-11 (average 9 days), while there was a record spell of 25 days of 26 °C or higher during February. In contrast, a cool spell in early January included the coolest January day for Sydney since 1978.
|Extremes in summer 2015-16|
|Hottest day||42.2 °C at Penrith Lakes AWS on 25 Feb 2016|
|Warmest days on average||29.8 °C at Penrith Lakes AWS|
|Coolest days on average||26.5 °C at Terrey Hills AWS|
|Coldest day||16.2 °C at Springwood (Valley Heights) on 5 Jan 2016|
|Coldest night||8.9 °C at Camden Airport AWS on 4 Dec 2015|
|Coolest nights on average||
16.1 °C at Camden Airport AWS|
16.1 °C at Campbelltown (Mount Annan)
|Warmest nights on average||19.6 °C at Sydney Airport AMO|
|Warmest night||24.3 °C at Parramatta North (Masons Drive) on 21 Dec 2015|
|Warmest on average overall||24.0 °C at Penrith Lakes AWS|
|Coolest on average overall||21.9 °C at Springwood (Valley Heights)|
|Wettest overall||542.0 mm at Turramurra (Kissing Point Road)|
|Driest overall||277.0 mm at Campbelltown (Kentlyn (Georges River Road))|
|Wettest day||129.0 mm at Frenchs Forest (Frenchs Forest Rd) on 6 Jan 2016|
|Strongest wind gust||213 km/h at Kurnell AWS on 16 Dec 2015|
|Highest summer total rainfall for at least 20 years|
|Frenchs Forest (Frenchs Forest Rd)||530.0||826.2||in 1991*||387.8|
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.
|Summary statistics for summer 2015-16|
|Badgerys Creek AWS||29.6||+0.8||41.8||20 Dec 2015||16.5||0.0||10.4||4 Dec 2015||168.2||244.9||low||69%|
|Bankstown Airport AWS||29.1||+1.3||40.7||25 Feb 2016||17.8||+0.2||11.8||4 Dec 2015||312.2||266.2||average||117%|
|Camden Airport AWS||29.4||+0.6||40.9||20 Dec 2015||16.1||-0.2||8.9||4 Dec 2015||330.6||241.7||high||137%|
|Campbelltown (Mount Annan)||29.1||40.1||20 Dec 2015||16.1||9.8||5 Dec 2015||292.0|
|Canterbury Racecourse AWS||27.4||+0.3||39.3||14 Jan 2016||17.5||-0.3||11.1||5 Dec 2015|
|Holsworthy Aerodrome AWS||28.5||40.6||14 Jan 2016||17.0||10.1||4 Dec 2015||340.8|
|Horsley Park Equestrian Centre AWS||28.8||0.0||40.0||20 Dec 2015||17.0||-0.2||11.0||4 Dec 2015||342.0||252.8||high||135%|
|Parramatta North (Masons Drive)||28.4||+0.5||40.0||25 Feb 2016||17.5||+0.4||11.0||4 Dec 2015||392.8||305.3||high||129%|
|Penrith Lakes AWS||29.8||0.0||42.2||25 Feb 2016||18.2||+0.3||12.4||4 Dec 2015||418.8||284.6||high||147%|
|Prospect Reservoir||29.1||+1.1||41.0||25 Feb 2016||17.4||+0.1||11.2||4 Dec 2015||399.5||266.8||high||150%|
|Richmond RAAF||29.6||+0.4||40.0||14 Jan 2016||17.0||-0.1||9.9||5 Dec 2015||359.4||287.5||high||125%|
|Springwood (Valley Heights)||27.4||39.5||25 Feb 2016||16.4||11.0||4 Dec 2015||442.2||368.0||average||120%|
|Sydney (Observatory Hill)||27.2||+1.6||39.2||14 Jan 2016||19.5||+1.1||14.3||15 Jan 2016||372.2||297.2||high||125%|
|Sydney Airport AMO||27.8||+1.6||40.6||14 Jan 2016||19.6||+1.1||14.3||15 Jan 2016||368.0||280.9||high||131%|
|Terrey Hills AWS||26.5||+0.7||38.9||14 Jan 2016||17.8||+0.2||12.0||30 Dec 2015||136.2||306.3||v low||44%|
The Seasonal climate summary lists the main features of the weather in 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.
A climate summary is generally published on the first working day of each month.
This statement has been prepared based on information available at 9 am on Tuesday 1 March 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Averages for individual sites 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 10 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
(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.
The ACORN-SAT dataset is used for temperature area averages.