Perth in June 2017: Very warm and dry

Most Perth sites recorded rain on only four or five days during June 2017, and rainfall totals were less than half the long-term average as a result. Daytime temperatures were mostly above average for the first 21 days, but below average after that, and it was the warmest June on record across Perth. Mean minimum temperatures were slightly below average for costal plain sites but above average on the hills and near the coast.

Well below average rainfall across Perth

  • Monthly rainfall across Perth was less than half of the June average, with totals mostly in the 30 mm to 60 mm range and driest June since 2013
  • Rainfall was recorded on four or five days for most sites, compared with the average of 15 or 16 rain days in June
  • Perth Metro registered four rain days, which broke the previous June record low of five rain days set in June 2006
  • A cut-off low pressure system over southwest WA produced daily rainfalls of 20 mm to 50 mm for most Perth Metropolitan sites on the 22nd
  • A daily total of 61.2 mm of rainfall at Perth Metro on the 22nd was its wettest June day for 31 years, since a daily rainfall of 77.1 mm was recorded on 25 June 1986

Well above average mean maximum temperatures

  • June was the warmest on record for all sites, with mean maximum temperatures 1 °C to 3 °C above average across Perth
  • Perth Metro recorded a mean maximum of 21.4 °C, its warmest June from records dating back to 1897; the previous record was 21.0 °C in 2015
  • Perth Metro recorded its longest run of consecutive days at or above 22 °C (9 days), 21 °C (13 days), and 19 °C (21 days) on record for June
  • The warmest day was on the 5th with daily maxima in the mid-20s; Gosnells and Medina had their highest June temperature on record
  • Mean minimum temperatures were below average for coastal plain sites but above average near the coast and in the hills
  • Rottnest Island had its highest daily minimum temperature on record on the 3rd, and its mildest June nights on record

Smoke affected Perth in early June

  • Smoke from prescribed burns impacted Perth communities in early June due to a high pressure system dominating over southern Australia. On the 7th, thick smoke reduced visibility down to 1500 metres at Perth Airport and triggered smoke alarms in the Swan City Council building in Midland.

Further information

Media
(03) 9669 4057
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Extremes in June 2017
Hottest day 26.7 °C at Medina Research Centre on the 5th
Warmest days on average 22.1 °C at Medina Research Centre
Coolest days on average 18.0 °C at Bickley
Coldest day 13.6 °C at Bickley on the 22nd
Coldest night 1.5 °C at Pearce RAAF on the 26th
Coolest nights on average 7.1 °C at Jandakot Aero
Warmest nights on average 14.5 °C at Rottnest Island
11.0 °C at Swanbourne
Warmest night 18.0 °C at Rottnest Island on the 3rd
14.9 °C at Gosnells City on the 14th
Warmest on average overall 17.3 °C at Rottnest Island
16.0 °C at Swanbourne
Coolest on average overall 13.3 °C at Bickley
Wettest overall 88.0 mm at Perth Metro
Driest overall 25.2 mm at Werribee
Wettest day 61.2 mm at Perth Metro on the 22nd
Strongest wind gust 81 km/h at Rottnest Island on the 23rd



Lowest June total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
June
Rottnest Island 11.8 6.8 in 1994* 95.3

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




Record highest June temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Medina Research Centre 26.7 on the 5th 26.5 on the 11th in 2015 32 19.4
Gosnells City 26.1 on the 5th 26.0 on the 12th in 2000 26 19.7



Record highest June mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Perth Metro 21.4 21.0 in 2015 119 19.4
Perth Airport 21.5 21.0 in 2015 73 19.0
Pearce RAAF 21.8 21.2 in 2015 56 18.9
Medina Research Centre 22.1 21.1 in 2015 31 19.4
Rottnest Island 20.1 19.7 in 2015 27 18.7
Jandakot Aero 21.2 20.7 in 2015 26 19.0
Gosnells City 21.7 21.1 in 2015 25 19.7
Bickley 18.0 17.5 in 2015 23 16.1



Record highest June daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Rottnest Island 18.0 on the 3rd 17.8 on the 3rd in 2005 28 13.3



Record highest June mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Rottnest Island 14.5 14.4 in 2004 27 13.3



Record highest June mean temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Rottnest Island 17.3 17.0 in 2015 27 16.0
Bickley 13.3 = 13.3 in 2015 23 12.1



Summary statistics for June 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
June
2017
Diff
from
average
Highest for
June
2017
Mean for
June
2017
Diff
from
average
Lowest for
June
2017
Total for
June
2017
Average
for
June
Rank of
June
2017
Fraction of
June
average
Bickley 18.0 +1.9 21.8 5th 8.6 +0.5 3.6 29th 60.4 194.7 v low 31%
Garden Island HSF 20.3 +1.3 23.8 11th 12.4 +0.3 9.0 30th 39.8 103.6 v low 38%
Gosnells City 21.7 +2.0 26.1 5th     6.4 30th 55.1 165.2 v low 33%
Jandakot Aero 21.2 +2.2 24.9 5th 7.1 -0.3 3.3 30th 53.6 153.0 v low 35%
Medina Research Centre 22.1 +2.7 26.7 5th 8.6 -0.4 4.4 26th 46.3 136.9 v low 34%
Millendon (Swan Valley) 21.5   25.4 13th 7.5   2.1 26th 35.8
Pearce RAAF 21.8 +2.9 26.4 5th 8.1 -1.3 1.5 26th 39.0 130.2 v low 30%
Perth Airport 21.5 +2.5 25.3 5th 8.6 -0.4 2.8 26th 52.4 155.9 v low 34%
Perth Metro 21.4 +2.0 25.6 5th 7.9 -0.7 1.9 9th 88.0 172.9 low 51%
Rottnest Island 20.1 +1.4 23.5 6th 14.5 +1.2 11.3 25th        
Swanbourne 21.0 +1.6 25.4 5th 11.0 +0.4 6.9 26th 55.8 122.2 v low 46%
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 June 2017
123456789101112131415161718192021222324252627282930
Bickley19.720.420.219.921.821.019.519.020.317.519.920.520.817.815.017.318.419.519.720.016.613.614.914.713.814.415.815.115.715.8
Garden Island HSF21.922.321.819.723.423.420.122.623.221.123.822.921.519.218.119.720.820.720.821.519.417.019.617.717.016.616.818.518.419.7
Gosnells City23.024.023.123.426.125.423.123.024.521.524.024.423.721.319.720.821.923.022.923.321.017.019.218.317.017.819.319.219.519.9
Jandakot Aero22.623.523.221.924.924.822.622.223.621.523.723.722.719.920.721.122.422.222.320.016.519.517.916.617.718.718.318.620.6
Karnet19.620.022.821.619.521.222.019.822.017.919.220.921.017.014.015.014.514.015.015.5
Medina Research Centre23.024.023.026.725.623.222.824.022.024.224.022.421.220.321.822.123.323.723.620.317.021.019.218.319.419.4
Millendon (Swan Valley)22.824.623.022.625.425.122.822.724.221.223.823.925.420.120.121.021.723.123.023.420.417.319.117.816.917.919.018.618.620.5
Pearce RAAF23.625.123.123.326.425.823.123.024.521.624.124.625.520.121.421.721.423.223.520.618.819.318.216.617.818.918.519.220.5
Perth Airport23.324.223.122.625.325.222.822.524.120.823.524.024.820.419.320.821.723.322.923.020.716.619.218.416.818.218.918.619.219.7
Perth Metro22.824.222.722.225.625.422.622.524.321.023.624.224.620.919.621.221.623.423.022.519.916.818.918.217.017.818.518.718.719.8
Rottnest Island21.522.722.019.523.023.519.721.323.321.023.022.922.218.619.919.521.021.619.617.418.617.015.916.416.517.418.520.3
Swanbourne22.023.122.521.425.424.322.422.624.321.123.524.522.720.019.020.521.822.822.221.519.517.118.617.616.817.117.718.919.420.0
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 2017
123456789101112131415161718192021222324252627282930
Bickley12.211.012.211.79.59.811.38.55.58.28.36.98.510.511.18.18.17.08.79.69.310.810.67.45.84.86.76.13.66.6
Garden Island HSF12.412.915.014.112.312.412.013.612.89.414.713.614.613.913.811.010.512.812.513.414.814.213.911.210.310.29.910.010.79.0
Gosnells City10.010.011.012.914.014.58.912.514.513.510.514.913.58.89.111.98.111.613.510.29.86.4
Jandakot Aero6.75.78.010.29.67.75.38.64.65.17.66.83.712.810.95.46.16.13.95.310.612.912.98.73.73.53.46.36.13.3
Karnet12.08.79.46.29.07.67.011.57.05.16.26.18.511.011.08.03.57.04.56.1
Medina Research Centre7.47.110.07.010.66.311.46.86.812.011.511.012.910.66.75.68.64.79.110.913.112.99.04.44.45.94.6
Millendon (Swan Valley)6.56.77.911.39.39.73.68.66.26.39.08.08.013.48.85.24.710.13.56.17.812.813.210.43.82.13.58.45.63.4
Pearce RAAF6.06.36.613.48.811.82.58.912.67.612.79.612.013.66.84.45.110.54.96.47.813.013.011.65.41.52.67.66.94.4
Perth Airport7.48.39.112.810.19.25.09.97.77.711.410.110.812.19.96.65.010.07.810.69.912.613.411.04.92.83.87.26.83.6
Perth Metro8.28.710.312.19.78.65.98.51.96.08.16.46.712.910.96.57.07.55.57.810.313.013.311.56.33.54.76.33.45.3
Rottnest Island16.516.318.014.713.416.515.114.014.816.616.115.916.314.015.213.914.115.014.615.515.313.414.012.111.311.512.811.912.914.2
Swanbourne11.611.512.913.011.413.69.410.910.011.712.111.611.713.013.09.79.511.19.510.813.613.712.910.47.86.98.88.28.310.0
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 2017
123456789101112131415161718192021222324252627282930
Anketell - - - - - - - - - - - - - 7.4 - - - - - - - 47.8 3.0 0.4 - - - - - -
Bickley - 0.2 0.2 - 0.4 - - 0.2 - - - - - 13.0 - 0.2 0.2 0.2 - 0.2 0.2 34.2 10.0 0.4 0.2 - - 0.2 0.2 0.2
Bungendore 0.2 0.2 0.2 0.2 0.4 - - - - - - - - 8.8 - 0.2 0.4 - 0.2 0.2 0.2 34.6 11.6 - 0.2 0.2 - 0.2 - -
Chidlow - - - - - - - - - - - - - 8.0 - - - - - - 0.1 20.0 7.6 1.6 - - - - - -
Garden Island HSF - 0.2 0.6 - - - - - - - - - - 7.6 - - - 0.2 - - 1.6 25.6 4.0 - - - - - - -
Gidgegannup - - - 0.2 - - - - - - - - - 9.6 - - - - - - 0.4 6.6 10.0 4.8 3.4 8.4 - - - -
Gosnells City - - - - - - - - - - - - - - - - - - - - 0.1 54.8 0.2 - - - - - - -
Jandakot Aero - - - 1.0 - - - - - - - - - 10.8 -
- - -
0.4 40.8 0.6 - - - - - - -
Jarrahdale - 0.2 0.2 0.2 0.2 0.4 - 0.2 0.2 0.2 - - 0.2 7.2 - 0.2 0.4 0.2 0.2 0.2 0.4 32.4 12.4 0.2 0.2 - 0.2 0.4 0.2 0.2
Karnet


0.2 - - - - - - - - - 12.0 -
- - - - 30.0 17.0 4.0 0.1 - - -

Karragullen North - - - - - - - - - - - - - 23.4 - - - - - - 1.6 37.2 6.4






Maida Vale - - - - - - - - - - - - - 11.2 - 0.2 - - - - - 33.6 1.4 - 0.2 - - - - -
Medina Research Centre - - 0.2 - - - - - - - - - - 10.2 - - - - - - 0.4 30.4 4.6 0.5 - - - - - -
Midland - - - - - - - - - - - - - 9.4 - - - - - - - 33.0 - - - - - - - -
Millendon (Swan Valley) - - - - - - - - - - - - - 9.4 - - - - - - - 25.4 1.0 - - - - - - -
Mount Helena












8.4






23.2 8.2






Mundaring - - 0.2 - - - - - - - - - - 10.2 - - - - - 0.6 0.2 24.6 6.8 1.4 - - - -
Pearce RAAF - - - - - - - - - - - - - 8.8 - - - - - -
28.8 1.4 - - - - - - -
Perth Airport - - - - - - - - - - - - - 14.6 - - - - - - - 37.8 - - - - - - - -
Perth Metro - - - - - - - - - - - - - 26.2 - - - - - - 0.2 61.2 0.4 - - - - - - -
Pickering Brook












23.0






30.2 0.8






Roleystone - - - - - - - - - - - - - 17.0 - - - - - - 0.6 41.8 6.2 - - - - - - -
Rottnest Island 0.2 - 0.2 - - - - - - - - - - 11.0 -
- - - 0.2

0.2 - - - - - - -
Serpentine - - - - - - - - - - - - - 9.2 - - - - - - - 21.8 15.6 - - - - - - -
Swanbourne - - - 0.2 - - - - - - - - - 14.4 - - - - - 0.2 0.4 37.2 3.4 - - - - - - -
Tamala Park (Mindarie) - - - - - - - - - - - - - 12.4















Wanneroo - 0.2 - - - - - - - - - - - 14.6 - - - - - 0.4 0.6 38.5 1.8






Werribee - - - - - - - - - - - - - 5.8 - 0.2 - 0.2 - - 0.2 14.6 3.8 0.4 - - - - - -
Whiteman Park - - - - - - - - - - - - - 12.4 - - - - - - 0.8 31.4 1.6






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 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.

This statement has been prepared based on information available at 9 am on Monday 3 July 2017. 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.

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.

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

Further information

Media
(03) 9669 4057
Enquiries