Adelaide in spring 2015: Warm and dry

Both maximum and minimum temperatures were warmer than average during spring, owing to particularly warm periods through October and November. Rainfall was generally below average across Adelaide, with most locations across the region receiving less than 60% of their long term average.

  • Dry through October and November
  • Warmer than average days
  • Warmer than average nights

The season started with average rainfall throughout September. Rainfall tended below average in October and November. This resulted in the city receiving less than 60% of the long-term average seasonal total. With high pressure systems dominating weather throughout much of the season, several sites had their lowest total spring rainfall on record and some other sites had their lowest total spring rainfall for at least 20 years.

Early October saw a burst of heat not seen in Adelaide since 1914, and 40.1°C recorded on the 18th November was the hottest November day in 6 years, and the second earliest date this temperature was reached in spring for Adelaide. Overall, both maximum and minimum temperatures tended above average across the region. Maximum temperatures tended up to 2°C above average across the metropolitan region, while nights were more than 1°C above average. At Kent Town**, daytime temperatures averaged 24.6°C. The spring mean minimum temperature averaged 12.5°C. The warmer days and nights through October and November resulted in some sites having their highest spring mean daily maximum temperature on record and their highest spring mean temperature on record.

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Extremes in spring 2015
Hottest day 40.6 °C at Edinburgh RAAF on 18 Nov
Warmest days on average 25.0 °C at Parafield Airport
Coolest days on average 18.6 °C at Mount Lofty
Coldest day 7.8 °C at Mount Lofty on 2 Sep
Coldest night 1.0 °C at Mount Barker on 8 Sep
Coolest nights on average 8.9 °C at Mount Barker
Warmest nights on average 12.5 °C at Adelaide (Kent Town)**
Warmest night 23.0 °C at Mount Crawford AWS on 18 Nov
Warmest on average overall 18.5 °C at Adelaide (Kent Town)**
Coolest on average overall 13.8 °C at Mount Lofty
Wettest overall 162.4 mm at Mount Lofty
Wettest day 37.6 mm at Ashton on 8 Sep
Strongest wind gust 93 km/h at Mount Crawford AWS on 30 Nov

Record lowest spring total rainfall
New record
(mm)
Old
record
Years of
record
Average for
spring
Willunga 48.6 51.8 in 1982 151 152.4

Lowest spring total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
spring
Adelaide (Brighton) 43.4 35.0 in 1938* 123.2
Blackwood (Wittunga) 71.6 71.1 in 1982* 165.1
Happy Valley Reservoir 63.8 55.6 in 1982* 147.3

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported.




Record highest spring mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
spring
Mount Barker 23.1 22.9 in 2014 113 19.5
Parafield Airport 25.0 = 25.0 in 2014 58 22.1
Adelaide (Kent Town)** 24.6 24.5 in 2014 38 22.1
Mount Crawford AWS 20.9 = 20.9 in 2014 21 18.5



Record highest spring mean temperature
New record
(°C)
Old
record
Years of
record
Average for
spring
Mount Barker 16.0 15.9 in 2014 112 13.4
Mount Crawford AWS 15.4 15.1 in 2014 21 13.7



Summary statistics for spring 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
spring
2015
Diff
from
average
Highest for
spring
2015
Mean for
spring
2015
Diff
from
average
Lowest for
spring
2015
Total for
spring
2015
Average
for
spring
Rank of
spring
2015
Fraction of
spring
average
Adelaide (Kent Town)** 24.6 +2.5 40.1 18 Nov 12.5 +0.7 4.3 5 Sep 71.0 128.4 low 55%
Adelaide Airport 23.1 +2.0 39.3 18 Nov 11.9 +1.1 3.5 5 Sep 33.6 105.4 v low 32%
Edinburgh RAAF 24.7 +2.4 40.6 18 Nov 11.2 +0.9 1.8 19 Sep
Kuitpo Forest Reserve 20.5 +1.4 35.3 18 Nov 10.2 +0.7 4.2 23 Sep 102.2 151.4 low 68%
Mount Barker 23.1 +3.6 36.0 18 Nov 8.9 +1.6 1.0 8 Sep 85.4 190.1 v low 45%
Mount Crawford AWS 20.9 +2.4 36.0 18 Nov 10.0 +1.2 1.2 23 Sep 76.8 145.8 low 53%
Mount Lofty 18.6 +3.8 33.4 18 Nov 9.1 +1.6 1.2 23 Sep 162.4
Noarlunga 22.8 +1.2 37.5 18 Nov 12.4 +0.4 4.8 29 Sep 44.2 98.5 low 45%
Parafield Airport 25.0 +2.9 40.5 18 Nov 10.9 +0.5 2.0 19 Sep 56.8 110.0 v low 52%

** note: Instrument failure on the 21st means that the actual monthly mean temperatures at Adelaide (Kent Town) may differ from the values reported in these tables


Notes

The Seasonal climate summary lists the main features of the weather in Adelaide 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 10 am on Tuesday 1 December 2015. 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 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 used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries

Climate

Service notice

Network problems on 8 January disrupted processing of observations, affecting some climate information. Missing data are being retrieved and will be processed into our systems over coming weeks.