Adelaide Metro & Hills in spring 2013: Warm and dry with a cool finish

  • With dry conditions dominating much of spring, rainfall was generally only 6070% of average, continuing a run of drier spring conditions for Adelaide since 2005
  • A record warm start with a cool finish

Rainfall

The spring 2013 rainfall total at Adelaide (Kent Town) was 80.2 mm, 53 mm below the long-term spring rainfall average of 133.2 mm. Spring rainfall has not been above average for Adelaide since 2005.

The season started with near-average rainfall, but became progressively drier, finishing with well-below-average rainfall in November. On the Adelaide plains spring rainfall totals were typically in the 5080 mm range, with totals typically ranging between 90 and 140 mm for the season in the Adelaide Hills. Most locations recorded about 6070% of average spring rainfall this season. Uraidla recorded the highest spring rainfall total in the region with 213.8 mm. Mount Lofty recorded the wettest day of the season, with 26.4mm on 13 September.

Temperature

Spring started with a run of well-above-average temperatures during the first week, with September as whole also the warmest September on record for Adelaide by a large margin. October was also slightly warmer than average, and while November saw cool nights, daytime temperatures were close to average. As a whole, this resulted in warmer-than-average spring temperatures but slightly cooler than spring 2012, which had near-average temperatures and a hot finish in November 2012.

Maximum temperatures were generally warmer than average across the Adelaide Metropolitan and Hills area this spring. The mean maximum temperature recorded at Adelaide (Kent Town) for spring 2013 was 23.3 C, which is 1.3 C above the average spring maximum temperature. In comparison, spring 2012 saw daytime temperatures 1.5 C warmer than average.

The hottest maximum temperature recorded in the Adelaide Metropolitan and Hills area during spring 2013 was 38.5 C at Edinburgh Aerodrome on 27 November. The coldest day was recorded at Mount Lofty with 9.0C on 10 September. Parafield Airport recorded the warmest days on average with 24.0 C. The coolest days on average were recorded at Mount Lofty with 17.1 C.

Minimum temperatures were also warmer than average across the Adelaide Metropolitan and Hills area. The mean minimum temperature for spring 2013 at Adelaide (Kent Town) was 12.4 C, which is 0.7 C above the spring average minimum. The warmest night during spring 2013 was recorded at Adelaide (Kent Town) with 25.9 C on 27 November; this was also the warmest November night for Adelaide since 2004. The coldest night for any location across the Adelaide area during spring was observed at Mount Barker on 25 October with 2.2 C. The coldest nights on average were observed at Mount Lofty with a seasonal average of 8.2 C. The warmest nights on average were at both Kent Town and Noarlunga with 12.4 C.

Further information

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Extremes in spring 2013
Hottest day 38.5 C at Edinburgh RAAF on 27 Nov
Warmest days on average 24.0 C at Parafield Airport
Coolest days on average 17.1 C at Mount Lofty
Coldest day 9.2 C at Mount Lofty on 10 Sep
Coldest night 2.2 C at Mount Barker on 25 Oct
Coolest nights on average 8.2 C at Mount Lofty
Warmest nights on average 12.4 C at Adelaide (Kent Town)
12.4 C at Noarlunga
Warmest night 25.9 C at Adelaide (Kent Town) on 27 Nov
Warmest on average overall 17.8 C at Adelaide (Kent Town)
Coolest on average overall 12.7 C at Mount Lofty
Wettest overall 191.4 mm at Mount Lofty
Driest overall 57.4 mm at Adelaide Airport
Wettest day 26.4 mm at Mount Lofty on 13 Sep
Highest wind gust 104 km/h at Noarlunga on 30 Sep


Summary statistics for spring 2013

Maximum temperatures
for spring
(C)
Minimum temperatures
for spring
(C)
Rainfall
for spring
(millimetres)
Mean for
spring
2013
Diff
from
average
Highest for
spring
2013
Mean for
spring
2013
Diff
from
average
Lowest for
spring
2013
Total for
spring
2013
Average
for
spring
Rank of
spring
2013
Fraction of
spring
average
Adelaide (Kent Town) 23.3 +1.3 37.0 27 Nov 12.4 +0.7 5.4 15 Oct 80.2 133.2 low 60%
Adelaide Airport 22.4 +1.4 34.9 27 Nov 11.6 +0.8 5.0 15 Oct 57.4 107.4 low 53%
Edinburgh RAAF 23.7 +1.5 38.5 27 Nov 10.9 +0.6 3.7 15 Oct 65.2 110.3 low 59%
Mount Barker 20.4 +0.9 35.0 27 Nov 8.7 +1.4 2.2 25 Oct 147.8 191.5 low 77%
Mount Lofty 17.1 30.4 27 Nov 8.2 3.3 24 Oct 191.4


Noarlunga 22.0 34.8 26 Nov 12.4 6.9 25 Oct 73.4


Parafield Airport 24.0 +2.0 38.0 27 Nov 10.9 +0.5 3.4 15 Oct 64.6 111.8 low 58%

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 9 am on Monday 2 December 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
Enquiries