Greater Adelaide in winter 2017: near-average rainfall and temperatures

Winter rainfall was generally slightly above average around Adelaide and Hills. Despite a cool end to the season, winter mean daytime temperatures were warmer than average throughout the Adelaide region, while nights were generally slightly cooler than the winter average.

This summary includes data from observing sites in or near the Greater Adelaide “Greater Capital City Statistical Area” (GCCSA) – see the notes.

Average to above average rainfall

  • Rainfall during winter was generally close to average throughout Adelaide and the Hills
  • Winter rainfall totals ranged from 82% of average at Adelaide (West Terrace / ngayirdapira) to 121% of average at Mount Barker
  • The wettest sites were in the Hills at Aldgate (530.8 mm), Uraidla (506.0 mm), and Bridgewater (490.7 mm)
  • Bridgewater also had the region's wettest days during winter, recording 54.0 mm on both 18 July and 15 August

Close to average temperatures with a cool end to the season

  • Winter daytime temperatures were warmer than average for all Adelaide suburbs and the Hills, despite a cool end to the season
  • Night time temperatures were generally close to the winter average throughout the Adelaide region
  • Temperatures around Adelaide dropped below zero several times during winter, with the coldest recorded minimum temperature being -1.6 °C at Rosedale in the northeast on the morning of 28 August

Adelaide (West Terrace / ngayirdapira)

  • Total rainfall for Adelaide (West Terrace / ngayirdapira) was 163.2 mm, which is 82% of the long-term average of 199.4 mm
  • The mean daily maximum temperature for Adelaide (West Terrace / ngayirdapira) was 16.4 °C, which is 0.8 °C above the long-term average. The warmest day was 23.0 °C on 13 August, and the coolest day was on 28 August when the temperature reached 11.5 °C
  • The mean daily minimum temperature for Adelaide (West Terrace / ngayirdapira) was 7.9 °C, which is 0.1 °C below the long-term average. The coldest morning was 3.2 °C on 3 June, and the warmest morning was on 15 August when the minimum temperature was 15.1 °C

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Extremes in winter 2017
Hottest day 24.2 °C at Edinburgh RAAF on 29 Jul
24.2 °C at Rosedale (Turretfield Research Centre) on 29 Jul
Warmest days on average 16.8 °C at Parafield Airport
Coolest days on average 10.6 °C at Mount Lofty
Coldest day 6.0 °C at Mount Lofty on 3 Aug
Coldest night -1.6 °C at Rosedale (Turretfield Research Centre) on 28 Aug
Coolest nights on average 4.6 °C at Rosedale (Turretfield Research Centre)
Warmest nights on average 8.6 °C at Noarlunga
Warmest night 15.2 °C at Adelaide Airport on 15 Aug
Warmest on average overall 12.1 °C at Adelaide (West Terrace / ngayirdapira)
12.1 °C at Noarlunga
Coolest on average overall 8.0 °C at Mount Lofty
Wettest overall 530.8 mm at Aldgate
Driest overall 132.6 mm at Morphettville
Wettest day 54.0 mm at Bridgewater on 18 Jul
54.0 mm at Bridgewater on 15 Aug
Strongest wind gust 98 km/h at Kuitpo Forest Reserve on 4 Aug

Highest winter mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
winter
Mount Barker 15.1 =15.1 in 1873* 13.6

* note: the site has moved in recent years and there are gaps in the historical record at this site, so despite the long history is it difficult to compare the temperatures over the years and it is possible a higher value has gone unreported




Summary statistics for winter 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
winter
2017
Diff
from
average
Highest for
winter
2017
Mean for
winter
2017
Diff
from
average
Lowest for
winter
2017
Total for
winter
2017
Average
for
winter
Rank of
winter
2017
Fraction of
winter
average
Adelaide (Kent Town) 16.4 +0.4 23.3 13 Aug 7.3 -0.7 1.7 4 Jun 187.6 222.5 low 84%
Adelaide (West Terrace / ngayirdapira) 16.4 +0.8 23.0 13 Aug 7.9 -0.1 3.2 3 Jun 163.2 199.4 average 82%
Adelaide Airport 16.1 +0.5 22.4 13 Aug 7.2 -0.2 1.8 4 Jun 171.8 166.4 average 103%
Edinburgh RAAF 16.4 +0.5 24.2 29 Jul 6.2 -0.3 0.8 4 Jun 164.4 157.9 average 104%
Kuitpo Forest Reserve 13.3 +0.4 19.9 13 Aug 6.8 -0.2 2.7 1 Jun 320.4 312.2 average 103%
Mount Barker 15.1 +1.5 22.8 14 Aug 5.1 +0.2 0.5 29 Aug 374.6 309.8 high 121%
Mount Crawford AWS 12.2 +0.6 20.3 29 Jul 6.2 +0.1 2.2 28 Aug 309.6 266.8 average 116%
Mount Lofty 10.6 +1.4 17.4 13 Aug 5.4 +0.2 1.1 28 Aug 441.8
Noarlunga 15.6 +0.2 20.7 13 Aug 8.6 -0.4 3.9 28 Aug 202.0 183.7 average 110%
Parafield Airport 16.8 +1.0 23.7 13 Aug 5.7 -1.0 -0.5 4 Jun 160.0 166.7 average 96%
Rosedale (Turretfield Research Centre) 16.1 +0.7 24.2 29 Jul 4.6 -1.2 -1.6 28 Aug 186.9 173.9 average 107%

Notes

The Seasonal climate summary, generally published on the first working day of each month, lists the main features of the weather in Greater Adelaide using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

In September 2017 this summary was broadened to include data from observing sites in or near the Greater Adelaide “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 10 am on Friday 1 September 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

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 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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

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