Greater Perth in June 2018: wettest June for six years

Rainfall was near average, and it was the wettest June for six years at most sites in Greater Perth. Both mean maximum and minimum temperatures were near average at most sites, though overnight temperatures at Jandakot Aerodrome were warmer than normal.

Near average rainfall at most sites

  • June rainfall was near average and the wettest June for six years at most sites, with monthly rainfall totals ranging between 110 mm and 160 mm at coastal plain sites, reaching 200 mm to 270 mm in the Perth hills
  • Counts of rain days were 13 or 14 days in June at most sites
  • Jarrahdale in the Hills claimed the wettest spot in the State with a monthly rainfall of 270.2 mm, which was its wettest June for nine years when a total of 296.6 mm was recorded in June 2009
  • The wettest day was on the 10th, and Jarrahdale recorded the highest daily rainfall of the month with 81.0 mm

Near average daytime and overnight temperatures at most sites

  • Both mean maximum and minimum temperatures were close to average at most sites
  • The warmest day was on the 17th, with the highest temperature of the month being 24.2 °C at Pearce RAAF
  • The coldest day was on the 7th, with the lowest daily maxima of the month being 11.0 °C at Bickley
  • Cold mornings with daily minima below 5 °C occurred on the 2nd, 8th, 29th and 30th at some sites in the costal plain and Perth hills, with the lowest temperature of the month being 1.9 °C at Jandakot Aerodrome on the 30th

Perth Metro

  • Total rainfall for Perth Metro was 126.6 mm, which was the wettest June for six years when a total of 140.8 mm was recorded in June 2012
  • The mean maximum temperature for Perth Metro was 19.2 °C, which is -0.3 °C below the long-term average
  • The daily maximum temperature of 14.1 °C at Perth Metro on the 7th was its lowest daily maxima in June for nine years when a temperature of 12.8 °C was recorded on 23 June 2009
  • The mean minimum temperature for Perth Metro was 8.5 °C, which is -0.1 °C below the long-term average
  • The coldest morning was 3.8 °C on the 29th, and the warmest morning was 13.5 °C on the 10th

Further information

Media
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Extremes in June 2018
Hottest day 24.2 °C at Pearce RAAF on the 17th
Warmest days on average 19.3 °C at Pearce RAAF
19.3 °C at Perth Airport
Coolest days on average 16.1 °C at Bickley
Coldest day 11.0 °C at Bickley on the 7th
Coldest night 1.9 °C at Jandakot Aero on the 30th
Coolest nights on average 7.9 °C at Bickley
Warmest nights on average 13.6 °C at Rottnest Island
Warmest night 16.8 °C at Rottnest Island on the 5th
Warmest on average overall 16.3 °C at Rottnest Island
Coolest on average overall 12.0 °C at Bickley
Wettest overall 270.2 mm at Jarrahdale
Wettest day 81.0 mm at Jarrahdale on the 10th
Strongest wind gust 109 km/h at Rottnest Island on the 5th

Lowest June total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
June
Karnet 31.0 22.0 in 1994* 203.4

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




Summary statistics for June 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
June
2018
Diff
from
average
Highest for
June
2018
Mean for
June
2018
Diff
from
average
Lowest for
June
2018
Total for
June
2018
Average
for
June
Rank of
June
2018
Fraction of
June
average
Bickley 16.1 -0.1 20.6 3rd 7.9 -0.2 3.8 30th 205.8 194.9 average 106%
Garden Island HSF 18.5 -0.6 22.4 17th 12.2 +0.1 8.2 8th 157.6 106.7 high 148%
Jandakot Aero 19.1 0.0 23.7 17th 8.0 +0.6 1.9 30th 125.8 152.3 average 83%
Mandurah 18.4 -0.3 20.7 24th 11.3 -0.2 7.7 29th 123.0 115.7 average 106%
Millendon (Swan Valley) 19.1   23.5 17th 8.4   3.8 8th 118.0
Pearce RAAF 19.3 +0.4 24.2 17th 9.3 0.0 4.4 8th 116.8 130.0 average 90%
Perth Airport 19.3 +0.3 24.1 17th 8.9 -0.1 3.9 29th 120.8 155.4 average 78%
Perth Metro 19.2 -0.3 24.1 17th 8.5 -0.1 3.8 29th 126.6 124.5 average 102%
Rottnest Island 19.0 +0.2 22.2 17th 13.6 +0.2 10.3 8th 112.2 95.9 average 117%
Swanbourne 19.2 -0.3 23.5 17th 10.5 -0.1 6.4 29th 163.6 123.8 high 132%

Daily maximum temperatures for June 2018
123456789101112131415161718192021222324252627282930
Bickley15.716.920.617.614.813.411.015.117.215.515.115.515.117.617.817.920.313.514.816.416.915.618.418.116.916.613.614.713.615.4
Garden Island HSF17.417.718.719.718.817.713.616.120.119.217.419.517.418.820.621.422.417.419.118.918.018.318.820.819.519.417.616.416.718.2
Gosnells City18.419.522.521.019.017.819.518.019.421.521.724.017.418.520.622.022.020.619.217.217.218.6
Jandakot Aero18.119.121.620.717.917.414.116.620.419.717.419.517.519.420.821.623.717.618.919.319.119.320.921.719.919.316.116.718.2
Karnet15.515.017.820.817.019.417.514.514.5
Mandurah17.618.619.519.718.716.813.317.019.218.816.819.617.319.019.920.220.717.118.718.618.318.720.320.718.718.317.616.616.617.6
Millendon (Swan Valley)18.820.022.121.317.615.914.617.920.420.016.619.517.720.620.621.323.517.817.918.720.119.822.021.319.119.116.617.416.418.2
Pearce RAAF19.120.023.221.918.316.215.118.220.920.517.219.317.620.120.421.624.217.716.918.919.819.721.221.719.519.016.517.216.719.1
Perth Airport18.619.922.520.917.917.014.818.220.819.616.819.617.720.521.021.824.117.417.819.419.820.421.821.820.019.416.717.617.218.5
Perth Metro18.519.622.620.218.116.814.117.820.719.816.719.717.720.321.221.524.117.419.219.520.119.721.921.519.919.016.617.217.018.5
Rottnest Island17.017.618.520.819.017.213.617.420.519.618.119.918.520.020.521.322.216.819.720.019.219.620.520.819.720.518.816.216.918.9
Swanbourne18.218.520.621.017.917.513.717.020.319.617.919.518.119.521.321.923.517.419.719.619.519.821.522.420.319.916.516.817.318.5
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 June 2018
123456789101112131415161718192021222324252627282930
Bickley7.14.96.910.112.39.67.75.48.111.77.08.66.48.37.97.76.310.07.110.39.39.18.07.55.88.310.67.25.03.8
Garden Island HSF11.010.010.912.815.614.212.18.212.712.811.413.810.911.311.012.013.514.411.813.213.913.611.311.412.114.015.212.49.010.4
Gosnells City11.012.19.010.56.87.410.813.07.811.89.511.010.411.212.88.86.9
Jandakot Aero9.03.86.28.512.712.09.72.89.013.28.09.96.15.56.47.74.712.46.711.19.39.37.15.45.49.113.26.71.9
Karnet7.6  4.97.19.56.610.32.84.5
Mandurah10.68.29.912.013.713.711.27.98.913.810.812.59.310.39.711.612.814.010.612.513.013.110.410.311.913.414.111.37.79.6
Millendon (Swan Valley)8.98.18.39.612.310.19.03.89.514.27.410.06.46.35.18.27.110.26.510.78.67.58.08.07.59.612.49.04.63.8
Pearce RAAF8.68.610.210.313.610.710.24.410.514.07.810.96.87.96.37.28.412.96.612.39.07.310.67.910.311.212.29.14.77.1
Perth Airport8.55.46.59.615.610.410.04.310.313.88.210.96.57.06.48.88.012.66.610.38.89.510.98.19.210.112.78.33.96.0
Perth Metro8.15.36.29.813.012.110.14.79.113.59.010.77.27.06.87.15.911.97.910.99.79.47.86.55.310.313.48.73.83.9
Rottnest Island12.512.312.415.616.813.612.410.312.315.612.214.113.114.413.214.415.613.813.014.614.314.113.913.913.814.815.313.310.912.4
Swanbourne9.97.98.012.115.013.310.56.68.513.910.212.59.79.69.59.710.613.69.611.211.611.710.59.79.112.614.49.86.46.6
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 June 2018
123456789101112131415161718192021222324252627282930
Anketell 21.6 - - - 5.0 17.2 12.6 10.2 0.8 17.2 4.4 1.2 4.4 - - - - 13.0 5.8 10.6 0.4 3.0 - - - - 32.4 14.0 - -
Bickley 22.2 - - - 4.8 21.0 28.2 2.4 - 27.0 13.8 1.8 6.0 - 0.2 0.2 0.2 33.2 2.4 6.6 0.4 1.8 0.2 0.4 0.2 - 15.4 17.0 0.2 0.2
Bungendore 19.2 0.2 - - 4.6 12.8 8.4 3.4 0.2 38.0 11.0 1.6 2.0 0.2 0.2 - - 19.6 2.6 9.6 0.2 1.8 0.2 0.2 0.2 - 29.8 16.8 0.2 0.2
Chidlow 11.2 0.2 - - 2.8 15.8 26.8 3.4 - 23.0 1.0 1.7 - - - 19.6 2.6 1.0 - - 0.4 - - - 4.8 8.4

Garden Island HSF 9.6 - - - 6.8 5.0 5.0 14.6 7.0 23.0 2.2 1.4 3.0 - - - - 8.8 4.6 16.2 1.8 8.0 - 0.2 - - 27.2 13.2 - -
Gidgegannup 10.2 - - - 2.2 19.6 39.6 6.4 - 14.0 14.6 1.0 3.2 - 0.2 - - 27.4 1.8 3.4 0.2 0.2 0.2 0.2 - - 8.8 7.8 0.2 0.2
Gosnells City - - - - 4.0 9.8 3.5 1.8 16.0 5.2 - - - - - - 41.4 1.6 - -
Hopelands - - - - 6.4 7.0 16.0 4.2 2.6




















Huntly 12.8 0.1 - 0.1 9.0 11.8 9.5 1.6 3.2 42.8 8.8 3.2 6.8 - - - - 22.8 10.2 9.8 - 0.2 - - - 0.1 33.2 11.2 - -
Jandakot Aero 10.4 - - - 9.0

4.6 - 14.4 10.4 3.2 3.8 - - - - 11.0 1.8 3.4 0.2 3.0 - - - - 34.2 16.4
-
Jarrahdale 17.2 0.2 0.2 - 6.0 24.0 16.4 6.8 2.4 81.0 8.6 2.6 2.0 0.2 0.2 0.2 0.4 25.4 3.6 8.8 0.2 1.6 0.2 0.2 0.4 - 43.4 17.4 0.2 0.4
Karnet



1.0 - - - - - 0.2 23.0 6.6 0.2 - - - - -
Karragullen North 18.8 - - - 4.4 12.0 30.4 2.6 - 24.6 12.0 1.0 4.2 - - - - 23.8 3.4 3.8 - - - - - - 24.0 16.2

Maida Vale 9.2 - - - 3.4 15.2 24.0 2.2 0.2 22.6 3.4 1.0 4.4 0.2 - - - 17.0 4.4 3.4 4.6 0.8 - - - - 8.0 13.4 0.2
Mandurah 6.6 - - - 6.6 9.4 2.6 4.4 9.8 24.6 2.0 - 1.8 - - - - 7.0 10.2 11.0 0.2 1.2 0.2 - - - 23.8 1.6 - -
Midland 7.8 - - - 8.0 7.8 28.2 34.4 - - - 2.6 4.2 - - 17.2 3.2 8.4 - - - - - - 7.8 - 12.8
Millendon (Swan Valley) 8.0 - - - 1.6 13.6 25.2 4.0 - 10.4 3.8 1.4 8.0 0.2 - - - 16.6 1.0 4.4 2.4 - - - - - 5.6 11.6 0.2 -
Mosman Park - - - - - - 30.0 8.0 2.0 0.6 - - - 7.0 11.2










Mount Solus 10.8 - - - 4.4 12.4 6.4 3.2 1.2 47.8 8.4 1.8 3.4 - 0.2 0.2 - 15.2 3.8 5.2 0.2 0.4 0.4 0.2 0.2 - 32.8 7.4 0.2 0.4
Muchea 4.2 0.2 - - 1.6 20.4 21.0 9.0 - 25.4 4.8 1.2 1.8 - - 0.2 - 19.4 1.2 2.8 2.4 0.2 - 0.2 - - 12.6 5.8 - 0.2
Mundaring 14.0 - - - 4.8 17.0 27.2 4.0 0.2 27.6 9.6 0.8 2.4 - - - - 26.0 4.4 4.6 0.4 - - - - - 7.8 13.8 0.4
Noble Falls 7.2



18.6 22.2 6.0
16.0 10.0 1.4 5.0



21.0 2.0 3.2





6.6 9.0

Pearce RAAF 4.8 - - - 1.2 18.2 23.8 8.2 - 15.6 8.2 0.8 3.6 - - - - 16.4 0.6 5.8 1.4 0.2 - - - - 8.0
- -
Perth Airport 6.0 - - - 3.0 12.2 23.6 3.2 - 24.8 3.0 0.2 6.0 - - - - 13.6 3.8 3.0 - 0.2 - - - - 7.0 11.2 - -
Perth Metro 8.4 - - - 4.4 9.4 20.8 7.0 - 21.8 2.8 1.6 4.2 - - - - 11.2 2.4 4.0 - - 0.2 - - - 14.8 13.6 - -
Pinjarra South 5.8 - - - 4.6 13.8 5.4 2.4 4.6 29.8 4.2 1.6 1.8 - - - - 13.0 6.4 8.0 - 0.2 - - - - 38.0 5.4 0.2 -
Roleystone 16.8 - - - 4.6 12.8 19.4 4.4 0.6 28.2 12.4 2.6 4.2 - - - - 22.4 2.6 - - 3.0 - - - - 28.4 22.0 - -
Rottnest Island 8.0 - - - 4.8 4.6 9.8 19.4 5.6 6.6 1.2 0.2 2.2 - - - - 5.8 1.6 5.4 2.2 3.0 - - - - 18.8 13.0 - -
Serpentine 9.0 - - - 4.0 12.0 9.4 7.6 0.6 48.6 5.6 1.8 1.8 - - - - 14.0 3.8 7.6 0.2 1.8 - 0.2 - - 29.6 17.0 - -
Swanbourne 12.4 - - - 5.2 13.0 30.2 8.0 0.4 16.6 2.4 1.8 4.2 - 0.2 - - 9.2 3.0 5.4 1.4 - 0.2 - - - 31.0 18.8 0.2 -
Tamala Park (Mindarie) 12.1 - - - 3.0 10.5 33.4 15.2 0.2 8.8 4.2 - 12.0 - - - - 12.4 3.6 17.2 1.2 - - - - - 10.0 11.8 - -
Wanneroo - - - - 7.8 14.8 32.4 15.8 16.2 2.6 10.4 - - 14.4 1.8 14.6 0.6 0.1 - - - - 10.4 7.8 0.2
Werribee 5.2 0.2 - - 2.8 16.6 19.2 4.0 - 12.0 7.0 0.6 1.6 - - 0.2 - 16.0 1.6 0.4 - 0.4 - 0.2 - - 5.8 7.6 0.2 -
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, generally published on the first working day of each month, lists the main features of the weather in Greater Perth using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

In September 2017 this summary was broadened to include data from observing sites in or near the Greater Perth “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 9 am on Monday 2 July 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
Enquiries