Perth in spring 2014: Third warmest spring at Perth Metro

Rainfall in spring 2014 was near average across the Perth metropolitan area and ranged from 95 mm to 160 mm at most coastal plain sites and on the islands, increasing to 220 mm in the hills. It was the driest spring for four years, since spring 2010, for most coastal plain sites. The wettest day of spring 2014 was 21 September when a strong cold front brought moderate rainfall of 20 to 40 mm across the Perth area, and Armadale reported 40.6 mm in the 24 hours to 9am on the 22nd, the highest daily fall in Perth for spring.

Mean daily maximum temperatures were above average in the Perth metropolitan area, as the result of a very warm September and October and near average November. The hottest day in spring 2014 was 9 November, with a daily maximum temperature of 39.1 °C at Pearce RAAF being the highest temperature recorded in the Perth metropolitan area during spring. Perth Metro recorded a mean maximum of 24.2 °C, its third warmest spring in 116 years of record.

Mean minimum temperatures were above average across the Perth area as a result of above average September and October nights and a near average November. The coldest night in spring 2014 for most sites was either 1 or 14 September, and Jandakot Aerodrome recorded the lowest temperature in the Perth area in spring with a minimum of 3.1 °C on 14 September. Perth Metro recorded a mean minimum temperature of 12.6 °C in spring 2014, its second warmest spring on record at the current Mt Lawley site, only behind last year when a mean minimum of 13.2 °C was recorded.

  • Driest spring for four years for coastal plain sites
  • Third warmest spring at Perth Metro in terms of maximum temperatures

Further information

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Extremes in spring 2014
Hottest day 39.1 °C at Pearce RAAF on 9 Nov
Warmest days on average 25.1 °C at Pearce RAAF
Coolest days on average 21.4 °C at Garden Island HSF
21.7 °C at Bickley
Coldest day 13.1 °C at Bickley on 8 Sep
Coldest night 3.1 °C at Jandakot Aero on 14 Sep
Coolest nights on average 10.7 °C at Bickley
Warmest nights on average 15.1 °C at Rottnest Island
13.3 °C at Swanbourne
Warmest night 20.3 °C at Rottnest Island on 26 Nov
20.1 °C at Pearce RAAF on 26 Nov
Warmest on average overall 19.0 °C at Gosnells City
Coolest on average overall 16.2 °C at Bickley
Wettest overall 236.8 mm at Jarrahdale
Driest overall 95.2 mm at Rottnest Island
101.2 mm at Pearce RAAF
Wettest day 40.6 mm at Armadale on 22 Sep
Strongest wind gust 102 km/h at Rottnest Island on 7 Sep




Summary statistics for spring 2014
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
spring
2014
Diff
from
average
Highest for
spring
2014
Mean for
spring
2014
Diff
from
average
Lowest for
spring
2014
Total for
spring
2014
Average
for
spring
Rank of
spring
2014
Fraction of
spring
average
Bickley 21.7 +0.6 34.4 9 Nov 10.7 +0.8 5.4 1 Sep 215.0 235.3 average 91%
Garden Island HSF 21.4 +0.2 32.9 20 Sep 14.5 +0.8 9.6 1 Sep 118.0 122.3 average 96%
Gosnells City 25.0 +0.9 38.0 9 Nov 12.9 +0.8 6.0 1 Sep
Jandakot Aero 24.1 +1.1 37.2 9 Nov 11.0 +0.9 3.1 14 Sep 116.2 165.3 low 70%
Medina Research Centre     37.3 9 Nov     5.0 14 Sep 128.8 149.8 average 86%
Pearce RAAF 25.1 +1.6 39.1 9 Nov 10.8 +0.3 3.5 14 Sep 101.2 129.4 low 78%
Perth Airport 24.5 +1.6 38.2 9 Nov 11.5 +0.9 4.2 14 Sep 130.4 144.2 average 90%
Perth Metro 24.2 +0.9 37.8 9 Nov 12.6 +0.9 5.8 14 Sep 137.8 155.5 low 89%
Rottnest Island 21.6 +0.9 30.8 20 Sep 15.1 +0.9 9.6 22 Sep 95.2 114.4 average 83%
Swanbourne 23.7 +1.2 34.6 9 Nov 13.3 +0.7 7.6 1 Sep 164.6 153.3 average 107%

Notes

A Seasonal Climate Summary is prepared to list the main features of the weather in Perth 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.

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 Monday 1 December 2014. 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