Perth in winter 2016: Coldest winter days for at least two decades

Winter rainfall was generally below average in Perth. Day-time and overnight temperatures were below average, and it was the coldest winter for at least two decades across Perth.

Below average rainfall

  • Many sites recorded below average winter rainfall, including Perth Metro despite it was Perth Metro's wettest winter for five years
  • Close to normal number of rain days at most sites

Coldest winter days for at least two decades

Further information

Media
(03) 9669 4057
Enquiries

Extremes in winter 2016
Hottest day 24.9 °C at Gosnells City on 3 Jun
Warmest days on average 18.3 °C at Gosnells City
Coolest days on average 14.8 °C at Bickley
Coldest day 10.7 °C at Bickley on 8 Aug
Coldest night -1.6 °C at Jandakot Aero on 13 Jul
Coolest nights on average 5.8 °C at Karnet
Warmest nights on average 11.9 °C at Rottnest Island
9.6 °C at Swanbourne
Warmest night 16.2 °C at Rottnest Island on 16 Jul
15.8 °C at Swanbourne on 16 Jul
Warmest on average overall 14.6 °C at Rottnest Island
13.7 °C at Swanbourne
Coolest on average overall 10.6 °C at Karnet
10.8 °C at Bickley
Wettest overall 527.0 mm at Bickley
Driest overall 280.6 mm at Garden Island HSF
336.0 mm at Perth Airport
Wettest day 71.0 mm at Armadale on 11 Jul
Strongest wind gust 96 km/h at Rottnest Island on 7 Jun
94 km/h at Rottnest Island on 9 Jul
94 km/h at Rottnest Island on 17 Aug
94 km/h at Swanbourne on 17 Aug

Record lowest winter mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Bickley 14.8 = 14.8 in 1998 22 15.8
Perth Metro 18.0 18.2 in 1998 22 19.0
Swanbourne 17.7 18.1 in 1998 22 19.0

Lowest winter mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Karnet 15.3 15.0 in 1990 15.9
Pearce RAAF 17.8 16.9 in 1990* 18.4
Jandakot Aero 17.8 17.1 in 1990* 18.6
Perth Airport 17.9 17.8 in 1993 18.5
Rottnest Island 17.3 17.1 in 1993 18.2
Gosnells City 18.3 18.2 in 1993* 19.3
Medina Research Centre 18.1 17.7 in 1993* 18.9

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




Record lowest winter mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Bickley 6.8 7.0 in 2006 22 7.7

Lowest winter mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Rottnest Island 11.9 =11.9 in 1992 12.7



Record lowest winter mean temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Bickley 10.8 11.0 in 1998 22 11.7
Swanbourne 13.7 13.8 in 2001 22 14.5

Lowest winter mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Rottnest Island 14.6 =14.6 in 1993 15.4



Summary statistics for winter 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
winter
2016
Diff
from
average
Highest for
winter
2016
Mean for
winter
2016
Diff
from
average
Lowest for
winter
2016
Total for
winter
2016
Average
for
winter
Rank of
winter
2016
Fraction of
winter
average
Bickley 14.8 -1.0 21.0 3 Jun 6.8 -0.9 1.5 13 Jul 527.0 585.2 average 90%
Garden Island HSF 17.1 -1.3 21.9 3 Jun 10.8 -0.7 6.0 13 Jul 280.6 313.1 low 90%
Gosnells City 18.3 -1.0 24.9 3 Jun     1.6 13 Jul 374.8 452.0 low 83%
Jandakot Aero 17.8 -0.8 23.5 3 Jun 7.2 +0.1 -1.6 13 Jul 395.4 454.5 average 87%
Karnet 15.3 -0.6 21.5 3 Jun 5.8 -0.8 -0.5 24 Jul 513.1 611.8 low 84%
Medina Research Centre 18.1 -0.8 23.8 3 Jun 7.8 -0.7 0.9 1 Aug 343.1 398.0 low 86%
Pearce RAAF 17.8 -0.6 23.5 3 Jun 7.9 -0.7 0.5 13 Jul 342.0 368.7 average 93%
Perth Airport 17.9 -0.6 24.7 3 Jun 7.9 -0.4 0.9 24 Jul 336.0 430.2 low 78%
Perth Metro 18.0 -1.0 24.3 3 Jun 8.1 -0.1 0.6 13 Jul 372.2 474.2 low 79%
Rottnest Island 17.3 -0.9 21.4 3 Jun 11.9 -0.8 8.4 24 Jul 338.2 305.8 average 111%
Swanbourne 17.7 -1.3 23.1 3 Jun 9.6 -0.5 3.4 13 Jul 440.8 389.4 high 113%
Note: Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

Notes

The Seasonal climate summary lists 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.

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 Thursday 1 September 2016. 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.

Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

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