Perth in winter 2014: Record warm winter

Rainfall in winter 2014 was near average to below average across the Perth metropolitan area. Monthly rainfall totals ranged from 280 mm to 300 mm in the northeastern suburbs and on the islands, increasing to 300 mm to 410 mm across the remainder of the coastal plain, and to over 530 mm in the hills.

Across the Perth area, mean daily maximum temperatures were about 1 °C above the long-term average, and most sites equalled or broke their record for the highest mean maximum temperature in winter. Mean minimum temperatures were above average across the Perth area, and Rottnest Island equalled its warmest winter on record, equal with 2013 and 1983.

  • Wettest winter day in 13 years of record at Garden Island on 18 June with 44.8 mm, whilst on this day the highest daily total for winter 2014 was recorded at Bickley with 71.8 mm.
  • Warmest winter in terms of mean maximum temperature at Perth Metro in 117 years of record.

 

Further information

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Extremes in winter 2014
Hottest day 27.4 °C at Gosnells City on 17 Aug
Warmest days on average 20.4 °C at Gosnells City
Coolest days on average 16.6 °C at Bickley
Coldest day 11.8 °C at Bickley on 22 Jul
Coldest night 0.1 °C at Jandakot Aero on 15 Jun
Coolest nights on average 7.5 °C at Jandakot Aero
Warmest nights on average 13.4 °C at Rottnest Island
10.7 °C at Swanbourne
Warmest night 17.8 °C at Rottnest Island on 29 Aug
17.3 °C at Medina R. C. on 29 August
Warmest on average overall 16.2 °C at Rottnest Island
15.4 °C at Swanbourne
Coolest on average overall 12.4 °C at Bickley
Wettest overall 539.0 mm at Bickley
Wettest day 71.8 mm at Bickley on 18 Jun
Highest wind gust 106 km/h at Rottnest Island on 17 Jun
106 km/h at Rottnest Island on 7 Jul

Record highest winter daily rainfall
Highest daily rainfall
in winter 2014 (mm)
Previous wettest
for winter
Years of
record
Garden Island HSF 44.8 on 18 Jun 42.6 on 1 Jun 2008 13



Record highest winter temperature
Highest temperature
in winter 2014 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Medina Research Centre 26.2 on 17 Aug = 26.2 on 3 Jun 1984 29 18.9
Swanbourne 26.2 on 6 Aug = 26.2 on 12 Jun 2000 21 18.9



Record highest winter mean daily maximum temperature
Mean daily maximum
temperature
for winter 2014 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Perth Metro 19.9 19.8 in 2006 117 18.9
Rottnest Island 18.9 = 18.9 in 2006 117 18.1
Pearce RAAF 19.7 = 19.7 in 2006 53 18.3
Jandakot Aero 19.5 19.4 in 2006 23 18.5
Bickley 16.6 = 16.6 in 2006 20 15.7
Gosnells City 20.4 20.2 in 2006 20 19.2
Swanbourne 20.1 19.7 in 2013 20 18.9



Record highest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2014 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Rottnest Island 13.4 = 13.4 in 2013 & 1983 117 12.7



Summary statistics for winter 2014
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2014
Diff
from
average
Highest for
winter
2014
Mean for
winter
2014
Diff
from
average
Lowest for
winter
2014
Total for
winter
2014
Average
for
winter
Rank of
winter
2014
Fraction of
winter
average
Bickley 16.6 +0.9 22.8 6 Aug 8.2 +0.6 2.6 1 Aug 539.0 589.9 average 91%
Garden Island HSF 18.8 +0.5 24.0 17 Aug 12.2 +0.8 7.0 1 Aug 298.0 320.0 average 93%
Gosnells City 20.4 +1.2 27.4 17 Aug 9.6 +0.6 3.0 15 Jun 401.3 456.7 low 88%
Jandakot Aero 19.5 +1.0 26.4 17 Aug 7.5 +0.4 0.1 15 Jun 410.6 458.7 average 90%
Medina Research Centre 19.8 +0.9 26.2 17 Aug 8.9 +0.4 1.0 28 Jun 297.9 402.9 low 74%
Pearce RAAF 19.7 +1.4 26.4 17 Aug 8.8 +0.2 1.2 29 Jun 280.0 371.1 low 75%
Perth Airport 19.8 +1.4 26.8 17 Aug 8.8 +0.5 1.0 14 Jun 333.4 433.3 low 77%
Perth Metro 19.9 +1.0 26.9 17 Aug 8.9 +0.8 1.9 14 Jun 351.8 476.3 low 74%
Rottnest Island 18.9 +0.8 23.8 5 Jun 13.4 +0.7 8.7 1 Aug
Swanbourne 20.1 +1.2 26.2 6 Aug 10.7 +0.7 4.8 10 Jul 412.4 389.9 average 106%

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 September 2014. 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 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.

Further information

Media
(03) 9669 4057
Enquiries