Adelaide Metro & Hills in autumn 2013: Record heat and dry conditions.

This statement was prepared on the afternoon of 31st May before all maximum temperature data for the period were available. This may affect some of the statistics presented.
  • Hottest autumn on record for Adelaide (since records began in 1887).
  • Warmer than average by 1 to 2 C.
  • Drier than average, with rainfall typically 20% below normal.

Rainfall

Autumn rainfall across the Adelaide metropolitan area was generally below average throughout the season, with locations across the plains seeing rainfall about10% below average, and hills locations receiving up to 30% less rainfall than average.

The season started with drier than average conditions through March, near average April rainfall, and below average May rain. Sporadic and weak tropical activity has contributed to weather systems producing less rainfall than usual this season.

Adelaide (Kent Town) received 107.8 mm against the long term average of 123.2 mm. By comparison 153.0mm was recorded in autumn 2012. The lowest autumn rainfall total on record for the South Australian Regional Office (Kent Town) is 23.0 mm in 2005 and the highest is 281.8 mm recorded in 1983.

Rainfall totals were generally ranged from 80 to 110 mm on the plains, with totals of 140 to 200 mm in the Adelaide Hills. The wettest location in the Adelaide metropolitan and hills region was at Crafers in the Adelaide Hills which recorded 201.6 mm.

Note that the Adelaide official climate rainfall record is taken from the manually observed 203mm rain gauge at the Kent Town site of the Adelaide. These figures may differ from totals on some Bureau web pages as these may be from automatic tipping bucket rain gauge readings.

Some sites had their lowest total autumn rainfall on record.

Temperature

Both maximum and minimum temperatures were between 1 to 2 C hotter than average in autumn 2013. The season started with well above average temperatures through March, with closer to average temperatures in April. The first half of May saw another burst of well above average temperature, with the month also 1 to 2 C warmer than average for both day and night time conditions. This has resulted in the hottest autumn for Adelaide on record (combining maximum and minimum temperatures) since records began in 1887. The previous hottest autumn was in 1923.

The maximum temperature averaged for the whole of autumn at Adelaide (Kent Town) was 24.4 C, which is 1.7C above the average autumn maximum temperature of 22.7C. The lowest recorded maximum temperature for autumn at the South Australian Regional Office (Kent Town) is 20.6C in 1995. By comparison, the mean maximum temperature for autumn 2012 was 22.8C.

The hottest day during autumn, for any location in the Adelaide metropolitan and Hills area was 39.5 C recorded at Edinburgh Airport on the 12th of March. Mount Lofty, in the Adelaide hills, recorded the coldest day during autumn with 9.4C on the 22nd of May.

Parafield Airport recorded the warmest days on average with 24.8C, with the coolest days on average of 18.6C at Mount Lofty.

The Adelaide (Kent Town) mean minimum temperature for autumn 2012 was 14.6C, 2.0 C warmer than the autumn mean minimum of 12.6C. In autumn 2012 the mean minimum temperature was 12.3C. The lowest minimum temperature for autumn in Adelaide (Kent Town) is 11.5 C observed in 1997.

The coldest night during autumn was recorded at Mount Barker with 3.8 C on the 18th of May, whilst the warmest night was recorded at Edinburgh Airport with 27.2C on the 7th of March.

The coolest nights on average for the season were at Mount Barker with 10.8 C, whilst the warmest nights on average was at Noarlunga, with an average of 15.1 C.

Further information

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Extremes in autumn 2013
Hottest day 39.5 °C at Edinburgh RAAF on 12 Mar
Warmest days on average 24.8 °C at Parafield Airport
Coolest days on average 18.6 °C at Mount Lofty
Coldest day 9.4 °C at Mount Lofty on 22 May
Coldest night 3.8 °C at Mount Barker on 18 May
Coolest nights on average 10.8 °C at Mount Lofty
Warmest nights on average 15.2 °C at Noarlunga
Warmest night 27.2 °C at Edinburgh RAAF on 7 Mar
Warmest on average overall 19.5 °C at Adelaide (Kent Town)
Coolest on average overall 14.7 °C at Mount Lofty
Wettest overall 206.0 mm at Crafers (Mt Lofty)
Driest overall 22.1 mm at Echunga Golf Course
Wettest day 40.4 mm at Uraidla (Sutton Creek) on 22 Apr
Highest wind gust 83 km/h at Mount Crawford (Mt Crawford AWS) on 21 Mar

Record lowest total autumn rainfall
Total rainfall
for 1 March to 31 May 2013 (mm)
Previous driest
for 1 March to 31 May
Years of
record
Average for
1 March to 31 May
Echunga Golf Course 22.1 27.8 in 2005 122 190.4



Record highest autumn daily maximum temperature
Mean daily maximum
temperature
for 1 March to 31 May 2013 (°C)
Previous warmest
for 1 March to 31 May
Years of
record
Average for
1 March to 31 May
Adelaide Airport 23.8 = 23.8 in 2008 59 22.1
Adelaide (Kent Town) 24.4 = 24.4 in 2008 37 22.7



Record highest autumn mean daily minimum temperature
Mean daily minimum
temperature
for 1 March to 31 May 2013 (°C)
Previous warmest
for 1 March to 31 May
Years of
record
Average for
1 March to 31 May
Adelaide Airport 14.0 13.8 in 2007 59 11.9
Parafield Airport 13.8 13.7 in 1942 53 12.0
Mount Barker 10.9 10.6 in 2007 52 8.7
Adelaide (Kent Town) 14.6 14.2 in 2007 37 12.6
Edinburgh RAAF 13.8 13.5 in 1989 37 11.8



Summary statistics for autumn 2013
Maximum temperatures
for 1 March
to 31 May
(°C)
Minimum temperatures
for 1 March
to 31 May
(°C)
Rainfall
for 1 March
to 31 May
(millimetres)
Mean for
1 March
to 31 May
2013
Diff
from
average
Highest for
1 March
to 31 May
2013
Mean for
1 March
to 31 May
2013
Diff
from
average
Lowest for
1 March
to 31 May
2013
Total for
1 March
to 31 May
2013
Average
for
1 March
to 31 May
Rank of
1 March
to 31 May
2013
Fraction of
1 March
to 31 May
average
Adelaide (Kent Town) 24.4 +1.7 38.4 11 Mar 14.6 +2.0 6.7 24 May 107.6 126.7 low 85%
Adelaide Airport 23.8 +1.7 36.9 12 Mar 14.0 +2.1 5.7 24 May 96.4 111.1 average 87%
Edinburgh RAAF 24.5 +1.5 39.5 12 Mar 13.8 +2.0 5.0 24 May 95.6 98.6 average 97%
Kuitpo Forest Reserve 21.1   35.4 11 Mar 12.4   5.8 13 May 134.0
Mount Barker 21.8 +1.1 37.6 11 Mar 10.9 +2.2 3.8 18 May 92.2 177.0 low 52%
Mount Crawford (Mt Crawford AWS) 20.7   35.6 12 Mar 11.7   5.2 13 May 143.4
Mount Lofty 18.6 +2.7 32.7 11 Mar 10.8 +1.2 4.2 13 May 186.8
Noarlunga 23.3   36.2 12 Mar 15.2   8.6 18 May 93.2
Parafield Airport 24.8 +2.0 38.4 12 Mar 13.8 +1.8 4.3 24 May 116.6 109.2 average 107%

Notes

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.

A Seasonal Climate Summary is prepared to list the main features of the weather in Adelaide Metro & Hills 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 3 pm on Friday 31 May 2013. 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
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