Adelaide Metro & Hills in autumn 2011: Wetter and cooler than average

  • Maximum temperatures cooler than the long-term average for autumn.
  • Average to above average rainfall totals recorded in the Adelaide and hills region.

Rainfall

Adelaide (Kent Town), had slightly above average autumn rainfall this year, with a total of 153.4mm (long-term autumn average is 125.7mm). Last year 125.4mm was recorded. The lowest autumn rainfall total on record for the South Australian Regional Office (Kent Town) is 23.0 mm in 2005. The highest autumn rainfall total at Kent Town is 281.8 mm in 1983.

The northern suburbs of Adelaide had above average rainfall with Edinburgh having almost double its long-term autumn average, and Parafield Airport receiving one and a half times its average. Elsewhere in the Adelaide and hills region, rainfall totals were generally close to average.

The wettest location in the Adelaide metropolitan and hills area was 328.8mm at Crafers (Mt Lofty). 

Please 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 highest total autumn rainfall for at least 25 years.
Some sites had their highest autumn daily rainfall on record.

Temperature

Throughout the metropolitan and hills area the autumn 2011 average maximum temperatures were up to 2°C below the long-term average, whilst average minimum temperatures were within 1°C of the normal.

The mean autumn maximum temperature at Adelaide (Kent Town) was 21.8°C, which is 0.9°C below the average autumn mean maximum temperature of 22.7°C.  The lowest mean maximum temperature for autumn at the South Australian Regional Office (Kent Town) is 20.6°C in 1995. The mean maximum temperature for autumn last year was 23.8°C.

The hottest day during autumn was 35.9°C recorded at Parafield Airport on the 7th of March 2011.
Mount Lofty, in the Adelaide hills, recorded the coolest day during autumn with 8.2°C on the 25th of May.

Parafield Airport recorded the warmest days on average with 22.2°C, with the coolest days on average of 15.8°C at Mount Lofty.

The Adelaide (Kent Town) mean minimum temperature for autumn 2011 was 12.5°C, which is just below the autumn mean minimum of 12.6°C. Last autumn the mean minimum temperature was 13.7°C. The lowest mean minimum temperature for autumn in Adelaide (Kent Town) is 11.5°C in 1997.   

The coldest night during autumn was recorded at Mount Barker with 1.6°C on the 31st of May, whilst the warmest night was recorded at Noarlunga with 21.7°C on the 8th of April.

The coolest nights on average for the season were at Mount Lofty with 9.0°C, whilst the warmest nights on average was at Noarlunga, averaging 12.9°C.

The mean temperature (average of the maximum and minimum temperature) at Adelaide (Kent Town) for autumn 2011 is 17.2°C. The lowest autumn mean temperature was recorded in 1995 with 16.2°C.

Some sites had their lowest autumn mean daily maximum temperature for at least 25 years.

 

Further information

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Extremes in autumn 2011
Hottest day 35.9 °C at Parafield Airport on 7 Mar
Warmest days on average 22.2 °C at Parafield Airport
Coolest days on average 15.8 °C at Mount Lofty
Coldest day 8.2 °C at Mount Lofty on 25 May
Coldest night 1.6 °C at Mount Barker on 31 May
Coolest nights on average 9.0 °C at Mount Lofty
Warmest nights on average 12.9 °C at Noarlunga
Warmest night 21.7 °C at Noarlunga on 8 Apr
Warmest on average overall 17.1 °C at Adelaide (Kent Town)
Coolest on average overall 12.4 °C at Mount Lofty
Wettest overall 328.8 mm at Crafers (Mt Lofty)
Highest wind gust 93 km/h at Adelaide Airport on 22 May

Record highest autumn daily rainfall
Highest daily rainfall
in autumn 2011 (mm)
Previous wettest
for autumn
Years of
record
Smithfield 64.0 on 8 Mar 63.0 on 16 Mar 1985 111



Highest total autumn rainfall for at least 25 years
Total rainfall
for autumn 2011 (mm)
Most recent autumn
at least this wet
Years since
wetter
Average for
autumn
Cudlee Creek (Millbrook) 296.0 339.6 in 1975 36 194.6
Williamstown 260.0 261.6 in 1975 36 154.7



Lowest autumn mean daily maximum temperature for at least 25 years
Mean daily maximum
temperature
for autumn 2011 (°C)
Most recent autumn
at least this cool
Years since
cooler
Average for
autumn
Mount Barker 18.5 18.2 in 1946 65 20.6



Summary statistics for autumn 2011
Maximum temperatures
for autumn
(°C)
Minimum temperatures
for autumn
(°C)
Rainfall
for autumn
(millimetres)
Mean for
autumn
2011
Diff
from
average
Highest for
autumn
2011
Mean for
autumn
2011
Diff
from
average
Lowest for
autumn
2011
Total for
autumn
2011
Average
for
autumn
Rank of
autumn
2011
Fraction of
autumn
average
Adelaide (Kent Town) 21.8 -0.9 34.9 7 Mar 12.5 -0.1 5.2 16 May 153.4 125.7 high 122%
Adelaide Airport 21.5 -0.6 35.2 7 Mar 12.1 +0.2 4.0 16 May 129.4 110.9 average 117%
Edinburgh RAAF 21.8 -1.2 35.8 7 Mar 11.6 -0.2 3.2 16 May 180.2 100.7 v high 179%
Mount Barker 18.5 -2.1 32.4 7 Mar 9.3 +0.9 1.6 31 May 162.4 177.4 average 92%
Mount Lofty 15.8   28.8 6 Mar 9.0   4.1 9 May 286.6
Noarlunga 21.1   33.6 7 Mar 12.9   7.0 31 May 92.0
Parafield Airport 22.2 -0.6 35.9 7 Mar 11.1 -0.8 2.8 16 May 167.6 109.8 v high 153%

Notes

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 11 am on Wednesday 1 June 2011. 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

Media
(03) 9669 4057
Enquiries