Perth in July 2016: Coolest July days for eighteen years at Perth Metro

Rainfall in July 2016 ranged from near average in western and northern suburbs of Perth, to below average for most eastern and southern locations. Both mean maximum temperatures and mean minimum temperatures were below average for most sites.

Near average to below average rainfall

  • Rainfall totals ranged from were near average in western and northern suburbs, to below average for most eastern and southern locations
  • Rain days were below average
  • Cold fronts produced moderate rainfall across Perth on the 8th-10th,17th-18th, 21st-22nd, and 31st

Cooler days and nights

  • Mean maximum temperatures were generally 0.5 °C below average for most sites in July
  • Perth Metro and Perth Airport had their coolest July days for eighteen years, since 1998
  • Daily maxima were mostly in the mid-to-high teens for coastal plain sites,with daily maxima over 20 °C on the 2nd,15th-16th,and 28th-29th
  • Mean minimum temperatures were about 1.0 °C below average for most sites
  • About one in four nights were very cold with daily maxima below 5 °C, and sub-zero temperatures recorded on the 13th and 24th
  • Perth Metro recorded its lowest temperature (0.6 °C on the 13th) for four years, since 25 July 2012 (0.4 °C)

Further information

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Extremes in July 2016
Hottest day 23.4 °C at Pearce RAAF on the 29th
Warmest days on average 18.0 °C at Gosnells City
Coolest days on average 14.5 °C at Bickley
Coldest day 10.8 °C at Karnet on the 24th
Coldest night -1.6 °C at Jandakot Aero on the 13th
-0.5 °C at Karnet on the 24th
Coolest nights on average 5.2 °C at Karnet
Warmest nights on average 11.4 °C at Rottnest Island
9.0 °C at Swanbourne
Warmest night 16.2 °C at Rottnest Island on the 16th
15.8 °C at Swanbourne on the 16th
Warmest on average overall 14.1 °C at Rottnest Island
13.2 °C at Swanbourne
Coolest on average overall 10.1 °C at Karnet
Wettest overall 193.2 mm at Bickley
Driest overall 75.0 mm at Garden Island HSF
94.6 mm at Medina Research Centre
Wettest day 55.6 mm at Bickley on the 17th
Strongest wind gust 94 km/h at Rottnest Island on the 9th



Record highest July daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Swanbourne 15.8 on the 16th = 15.8 on the 31st in 2015 23 9.6



Summary statistics for July 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
July
2016
Diff
from
average
Highest for
July
2016
Mean for
July
2016
Diff
from
average
Lowest for
July
2016
Total for
July
2016
Average
for
July
Rank of
July
2016
Fraction of
July
average
Bickley 14.5 -0.6 19.3 15th 6.3 -0.9 1.5 13th 193.2 215.2 average 90%
Garden Island HSF 16.8 -1.0 20.9 29th 10.2 -0.9 6.0 13th 75.0 112.9 low 66%
Gosnells City 18.0 -0.7 23.0 29th 7.6 -1.1 1.6 13th 158.5 160.7 average 99%
Jandakot Aero     21.9 28th     -1.6 13th 149.6 173.1 low 86%
Karnet 15.1 -0.3 19.6 29th 5.2 -1.0 -0.5 24th 130.8 215.3 low 61%
Medina Research Centre     21.9 28th 6.8 -1.4 1.0 24th 94.6 144.4 low 66%
Pearce RAAF 17.6 -0.2 23.4 29th 7.1 -1.1 0.5 13th 113.6 133.5 average 85%
Perth Airport 17.7 -0.2 22.6 29th 7.4 -0.6 0.9 24th 119.6 155.2 low 77%
Perth Metro 17.7 -0.7 22.5 29th 7.5 -0.2 0.6 13th 139.6 167.8 average 83%
Rottnest Island 16.9 -0.8 21.3 29th 11.4 -0.9 8.4 24th 98.8 113.6 average 87%
Swanbourne 17.5 -0.9 22.0 2nd 9.0 -0.6 3.4 13th 157.8 148.2 average 106%
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.

Daily maximum temperatures for July 2016
12345678910111213141516171819202122232425262728293031
Bickley16.117.614.111.514.514.612.913.510.913.613.411.312.815.119.317.214.313.814.815.212.012.812.712.914.316.116.519.118.416.012.1
Garden Island HSF18.017.815.815.117.217.517.916.715.115.715.314.615.617.520.218.717.815.116.417.115.414.616.814.615.316.918.219.120.918.614.9
Gosnells City20.522.516.615.117.818.015.916.914.217.116.815.216.618.822.220.718.917.218.419.015.716.017.015.317.118.419.722.423.019.316.0
Jandakot Aero18.421.616.714.317.217.615.617.215.718.221.720.318.816.818.317.715.415.216.314.516.218.119.021.921.819.215.2
Karnet16.119.012.114.515.214.113.514.514.314.012.614.216.019.517.418.414.115.315.312.312.913.010.813.515.516.819.219.616.512.0
Medina Research Centre19.021.317.015.117.018.617.017.016.415.816.717.521.520.519.616.918.818.215.215.516.514.916.518.119.321.9
Pearce RAAF18.821.217.514.216.117.316.117.114.017.116.313.516.218.422.821.819.116.717.418.315.215.217.115.316.318.418.620.723.419.415.4
Perth Airport19.521.116.914.516.717.615.517.013.517.016.814.316.218.322.120.719.018.217.618.414.915.616.715.316.818.918.921.622.619.215.8
Perth Metro19.320.716.614.716.717.615.917.414.516.416.614.216.018.222.021.119.416.818.019.015.315.717.115.117.118.419.021.122.519.415.6
Rottnest Island16.618.515.713.915.817.017.817.014.615.615.913.815.317.920.519.218.815.317.817.015.514.617.513.916.217.718.320.121.318.715.0
Swanbourne18.822.016.514.417.217.917.617.614.316.315.914.716.318.620.619.919.016.018.417.615.115.317.314.516.518.019.520.320.919.415.4
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for July 2016
12345678910111213141516171819202122232425262728293031
Bickley4.15.77.93.14.34.26.38.25.65.56.93.01.54.69.113.710.96.74.74.86.35.25.53.04.96.76.37.310.210.59.5
Garden Island HSF8.99.09.97.68.69.511.112.09.19.512.08.26.09.812.015.514.911.48.28.59.49.49.86.19.08.89.511.811.015.913.2
Gosnells City4.28.07.57.48.09.810.66.35.75.04.51.64.810.515.212.09.04.35.07.97.47.03.55.05.69.811.312.312.3
Jandakot Aero1.36.34.53.06.26.510.011.47.7-1.63.010.814.514.27.23.32.58.57.07.00.06.43.03.58.18.811.212.4
Karnet1.81.83.53.85.85.07.010.01.56.54.41.40.55.910.112.511.03.51.02.56.85.23.0-0.53.43.43.87.17.511.010.0
Medina Research Centre3.05.24.38.07.09.511.96.75.21.15.310.513.513.55.83.35.78.47.47.51.06.74.34.99.19.2
Pearce RAAF2.07.43.76.18.38.98.711.16.87.67.34.40.54.311.313.812.97.93.02.89.08.05.80.75.52.25.19.111.111.912.6
Perth Airport5.48.24.94.38.08.09.311.37.58.45.53.41.36.111.615.213.47.43.14.98.76.25.90.95.34.25.49.312.311.112.3
Perth Metro2.96.46.34.88.27.210.110.98.28.46.84.10.64.010.815.314.38.53.64.58.86.98.01.26.74.75.18.710.612.212.3
Rottnest Island12.312.214.18.69.510.711.212.98.78.611.79.58.610.911.916.214.610.210.612.410.49.511.18.410.612.311.612.515.014.911.9
Swanbourne6.27.410.06.48.58.610.011.18.08.69.56.13.47.411.315.814.09.56.36.28.68.69.14.38.26.87.69.713.115.212.2
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily rainfall for July 2016
12345678910111213141516171819202122232425262728293031
Bickley - - 0.2 0.2 - - - 16.6 18.4 36.6 1.2 - 0.2 - - - 55.6 15.0 0.2 - 20.6 12.4 0.2 1.2 - 0.2 0.2 - - 0.2 14.0
Bungendore 0.4 - 0.4 0.2 - - - 18.8 16.2 30.8 1.4 0.2 - 0.2 - 0.2 35.0 9.0 0.4 - 23.4 5.2 0.2 1.4 - 0.2 0.2 - - 1.6 9.0
Chidlow - - - - - - - 13.8 20.8 27.6 - - - - - 44.6 - - 17.8 8.0 - - - - - - - 2.0
Garden Island HSF 0.2 - 1.0 0.2 - - - 9.0 7.8 20.0 1.6 - - - - 1.4 7.0 5.0 - - 12.8 4.4 1.0 0.6 - - - - - 0.4 2.6
Gidgegannup - - 0.2 - - - - 12.8 18.2 31.6 0.4 - 0.2 - - - 35.0 9.6 0.2 - 18.6 7.8 0.2 0.4 0.2 - 0.2 - 0.2 0.6 14.8
Gosnells City - - - - 1.4 - - 18.2 23.1 31.2 0.8 - - - - 8.0 29.0 7.9 - - 23.0 7.2 - 0.8 - - - - - 0.1 7.8
Jandakot Aero - - 0.2 0.8 - - - 35.2 21.8 32.2 0.4 0.4
- - 0.4 20.8 9.0 - - 15.0 6.0 0.4 0.8 - - - - - - 6.2
Jarrahdale 0.2 0.2 0.2 0.4 - - - 22.4 15.2 27.6 1.6 0.2 0.4 - - 3.2 28.6 14.0 0.2 0.2 22.2 6.8 0.2 1.0 - 0.2 0.2 0.2 - 2.6 11.6
Karnet - - 0.6 0.2 - - - 22.3 10.6 16.0 0.9 - - - 0.4 4.2 25.0 11.4 - - 17.4 4.6 1.2 3.0 - 0.2 - 0.8 - 2.6 9.4
Karragullen North - - - - - - - 21.8 18.0 35.0 1.2 - - - - - 49.2 12.8 - 0.3 23.2 7.0 - 1.0 - - - - - - 17.3
Maida Vale - - - 0.4 - - - 10.2 17.8 26.6 0.8 0.2 - - - - 42.8 13.4 0.4 - - 5.6 - 1.0 - - - - - 0.2 9.8
Medina Research Centre - - 1.4 - - - - 7.8 41.2 0.8 0.1 - - 2.0 11.0 4.2 0.1 0.1 20.0 4.8 0.5 0.4 0.1 - - 0.1 -

Midland - 0.2 - - - 16.6 62.3 - - - - 32.6 - 0.2 13.2 3.2 - - - - - - -

Mount Helena


0.2


15.0 18.0 28.0 0.4




38.8 10.2

21.4 9.4
0.4 0.2



3.6 11.8
Mundaring - - - - - - - 17.2 24.0 27.4 0.6 0.2 - - - 52.0 - - 18.0 8.8 - - 0.2 - 1.6 10.4
Pearce RAAF - - - - - - - 8.6 14.8 41.2 3.2 - - - - - 20.0
- - 13.8 7.4 - 0.2 - - - - - 0.2 4.2
Perth Airport - - - - - - - 11.0 18.0 25.4 0.4 0.2 - - - - 34.6 9.2 - - 12.4 3.0 0.2 0.2 - - - - - - 5.0
Perth Metro - - - 0.4 - - - 13.2 27.4 29.8 2.6 0.2 - - - - 32.8 6.8 - - 15.4 4.0 - 0.6 - - - - - - 6.4
Pickering Brook






18.4 53.2 2.4




50.8 18.2


18.8







12.6
Roleystone - - - - - - - 23.2 16.8 38.0 2.0 - - - - 0.4 37.8 9.6 - - 28.4 5.6 - 1.0 - - - - - 2.0 7.4
Rottnest Island - - - 1.0 - - - 17.6 22.6 15.8 11.8 0.6 - - 0.2 1.8 8.8 6.0 - - 5.4 2.2 - 0.4 - - - - - - 4.6
Serpentine - - 0.2 0.2 - - - 18.2 13.2 25.2 2.0 - - - - 1.8 14.4 8.2 - - 15.4 5.4 - 0.4 - - - 0.2 - 1.0 12.6
Swanbourne - - - 0.4 - - - 12.8 37.8 40.0 3.2 - - - - - 20.4 9.0 - - 23.2 4.0 0.2 3.8 - - - - - - 3.0
Wanneroo - - - - - - - 11.4 65.2 - - - - 43.2 - - 13.0 2.8 0.4





Werribee 0.2 - 0.2 - - - - 10.2 18.8 23.0 0.4 0.2 0.2 - - - 22.2 8.4 - 0.2 14.4 8.0 - - 0.2 - - 0.2 - 1.0 13.8
Whiteman Park - - - - - - - 17.6 19.2 31.4 1.8 - 0.4 - - - 34.4 4.0 - - 10.0 4.6 - 0.6 - - - - - 0.4
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly 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 Monday 1 August 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