Perth in June 2014: Below average rainfall with cold nights

June 2014 was a relatively dry month for most sites in the Perth metropolitan area with rainfall totals between 50% and 80% of the average. Rainfall ranged from about 80 mm on the offshore islands to 90mm to 120 mm on the Swan Coastal Plain to near 160 mm in the hills. Mild weather for the first nine days of June gave way to mostly cool days with cold to very cold nights for the remainder of the month. Mean maximum temperatures were near average with daily maxima mostly in the 19 to 20 °C range, whilst mean minimum temperatures ranged from near average on the offshore islands, near the coast and in the hills, to 1 °C to 2 °C below average for coastal plain sites.

  • A strong cold front followed by a westerly flow and a secondary cold front brought rainfall across Perth from the 17th to 22nd, with moderate to heavy falls occurring on the 17th and 18th. Daily rainfall of 44.8 mm at Garden Island on the 18th is its highest daily rainfall in June in 13 years of record, whilst a daily total 71.8 mm at Bickley on the 18th was the highest daily fall in the metropolitan area for the month, and the highest daily rainfall in June at Bickley for 26 years, since 83.4 mm was recorded on 1 June 1988. The 24 hours to 9am on the 18th was the wettest day of the month for most sites.
  • The warmest day was the 5th across the Perth region and a daily maximum of 25.5 °C at Swanbourne and Gosnells City was the highest temperature recorded during the month. It was also the the highest temperature in June at Swanbourne for 14 years, since 12 June 2000 when a maximum 26.2 °C was recorded, whilst a maximum of 24.6 °C at Perth Metro on the 5th was the highest June temperature at the site for almost four years, since 13 June 2010 when a maximum of 24.6 °C was also recorded.
  • Pearce RAAF recorded its coldest June for 13 years, in terms of mean minimum temperature, since June 2001 when a mean minimum of 6.6 °C was recorded.
  • Perth Metro experienced nine consecutive days with a maximum at or above 20 °C from the 1st to 9th, which is the longest mild spell in June at the site for eight years, since nine consecutive such days were recorded between 11 and 19 June 2006.
  • Perth Airport recorded eleven very cold nights with temperatures at or below 5 °C, the greatest number of very cold nights for 58 years, since June 1956 when eleven cold nights was also recorded, and the equal second highest number of very cold nights in June since records commenced in 1944. The record high of 15 nights at or below 5 °C occurred in 1955.
  • A minimum of 1.9 °C on the14th at Perth Metro is the lowest temperature at the site in June for two years, since 20 June 2012 when a minimum of 1.8 °C was recorded.

Further information

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Extremes in June 2014
Hottest day 25.5 °C at Gosnells City on the 5th
25.5 °C at Swanbourne on the 5th
Warmest days on average 20.1 °C at Gosnells City
Coolest days on average 16.3 °C at Bickley
Coldest day 12.2 °C at Bickley on the 28th
Coldest night 0.1 °C at Jandakot Aero on the 15th
Coolest nights on average 5.6 °C at Jandakot Aero
Warmest nights on average 13.5 °C at Rottnest Island
9.9 °C at Swanbourne
Warmest night 17.5 °C at Rottnest Island on the 9th
16.1 °C at Swanbourne on the 10th
Warmest on average overall 16.2 °C at Rottnest Island
14.9 °C at Swanbourne
Coolest on average overall 12.0 °C at Bickley
Wettest overall 156.0 mm at Bickley
Wettest day 71.8 mm at Bickley on the 18th
Highest wind gust 106 km/h at Rottnest Island on the 17th

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



Summary statistics for June 2014
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2014
Diff
from
average
Highest for
June
2014
Mean for
June
2014
Diff
from
average
Lowest for
June
2014
Total for
June
2014
Average
for
June
Rank of
June
2014
Fraction of
June
average
Bickley 16.3 +0.3 21.4 5th 7.7 -0.4 3.4 28th 156.0 200.7 average 78%
Champion Lakes 19.1   24.1 5th 9.6   4.5 23rd 107.4
Garden Island HSF 18.9 -0.1 24.0 5th 11.8 -0.3 7.6 24th 85.4 113.3 low 75%
Gosnells City 20.1 +0.5 25.5 5th 8.8 -0.9 3.0 15th 122.2 170.5 low 72%
Jandakot Aero 19.1 +0.2 24.7 5th 5.6 -1.9 0.1 15th        
Pearce RAAF 19.3 +0.5 23.9 5th 7.5 -1.9 1.2 29th 93.0 133.5 low 70%
Perth Airport 19.6 +0.7 24.9 5th 7.5 -1.5 1.0 14th 89.0 159.1 low 56%
Perth Metro 19.6 +0.3 24.6 5th 7.5 -1.1 1.9 14th 93.6 174.5 low 54%
Rottnest Island 18.8 +0.1 23.8 5th 13.5 +0.2 9.5 28th 79.2 150.2 low 53%
Swanbourne 19.9 +0.6 25.5 5th 9.9 -0.7 5.1 28th 87.6 124.9 low 70%

Daily maximum temperature
Central Coast (09)123456789101112131415161718192021222324252627282930
Bickley17.918.418.920.021.420.317.117.120.713.514.315.414.715.316.817.815.214.214.415.816.113.413.315.017.216.314.612.213.418.5
Champion Lakes20.420.521.521.824.123.020.120.422.816.317.018.917.318.119.920.518.917.318.418.918.815.616.417.021.319.116.515.316.120.9
Garden Island HSF20.820.620.919.624.023.319.820.322.516.516.816.716.916.819.020.617.918.119.518.819.816.715.216.719.716.615.116.521.0
Gosnells City21.922.423.223.525.525.321.220.824.016.817.519.018.518.521.022.519.018.019.619.519.116.417.518.220.820.017.816.517.423.0
Jandakot Aero22.624.723.920.520.222.616.717.218.117.417.619.821.317.918.019.119.715.815.817.419.620.217.315.217.021.8
Medina Research Centre22.022.121.422.224.923.820.419.823.616.617.817.717.717.920.921.217.9
Pearce RAAF20.821.222.322.423.923.820.620.422.917.117.417.117.018.119.721.019.317.817.720.619.316.115.517.120.119.717.214.916.421.3
Perth Airport21.421.922.323.224.923.620.620.023.717.817.818.517.518.219.821.718.318.017.819.719.516.316.017.819.920.017.615.516.721.9
Perth Metro21.421.721.622.424.623.720.620.423.816.817.418.617.918.219.621.718.618.418.619.719.816.316.217.620.320.617.815.616.222.4
Rottnest Island20.820.820.620.123.823.320.620.922.316.216.416.017.016.918.920.717.718.519.419.320.116.614.616.618.420.117.014.416.221.0
Swanbourne21.921.222.122.925.524.821.320.422.416.918.318.817.817.720.321.518.418.220.618.919.716.617.017.720.220.218.316.116.922.9

This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.
The temperatures in this table are coloured by
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 difference from average


Daily minimum temperature
Central Coast (09)123456789101112131415161718192021222324252627282930
Bickley9.811.111.59.59.08.58.710.912.413.26.07.15.84.54.84.28.38.78.810.19.36.15.04.15.27.46.73.44.56.5
Champion Lakes11.511.912.312.712.812.714.714.914.914.86.37.55.75.55.47.49.511.110.49.813.06.74.56.66.77.36.86.76.811.4
Garden Island HSF13.813.415.112.512.813.414.916.216.615.910.410.48.68.18.910.313.611.913.013.114.413.08.17.68.511.711.87.88.110.6
Gosnells City11.011.911.010.013.013.313.314.815.015.05.56.44.63.13.05.510.011.010.011.812.46.73.15.04.06.55.56.54.911.6
Jandakot Aero9.96.84.26.910.514.414.82.23.81.51.00.10.44.810.99.59.810.95.40.51.41.64.42.31.41.210.4
Medina Research Centre12.012.511.88.08.38.68.210.814.514.53.94.92.71.31.94.110.110.9
Pearce RAAF12.611.67.89.312.512.713.315.814.013.32.84.41.51.42.26.06.810.97.712.410.96.01.42.33.04.74.33.11.210.4
Perth Airport9.112.59.68.010.811.613.014.414.114.23.13.71.91.03.87.36.410.79.211.99.16.01.33.92.95.12.94.93.29.6
Perth Metro10.613.210.38.98.86.213.312.214.215.14.75.62.91.92.13.07.311.48.110.810.97.12.12.82.75.95.52.64.89.7
Rottnest Island14.715.916.314.015.116.216.517.417.515.311.511.611.611.212.112.814.911.614.015.415.312.310.810.311.613.713.69.510.211.8
Swanbourne12.512.713.111.111.611.612.414.814.716.17.17.56.25.25.86.511.512.312.111.613.29.75.45.56.210.09.45.16.08.6

This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.
The temperatures in this table are coloured by
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 difference from average


Daily rainfall
Central Coast (09)123456789101112131415161718192021222324252627282930
Bickley 2.2 0.4 - 0.4 0.2 - - - 0.4 15.2 1.4 0.2 0.2 0.2 0.2 - 0.2 71.8 10.4 14.2 1.0 33.0 0.6 0.2 0.2 - 3.4 - - -
Champion Lakes 0.4 - - - - - - - 1.2 13.6 1.0 - - - - - - 50.8 9.4 4.2 1.2 24.8 0.2 - - - 0.6 - - -
Garden Island HSF 3.6 1.8 0.6 - - - - - 0.6 6.2 0.2 - - - - - 0.2 44.8 5.2 0.8 8.4 10.0 1.8 - -
1.2 - - -
Gosnells City 1.2 - - - - - 0.2 - 1.0 11.0 0.6 - - - - - - 62.0 11.0 10.0 0.2 19.2 1.8 - - - 4.0 - - -
Jandakot Aero 0.8


- - - - 2.4 23.8 - 0.2 - - - - - 35.2 12.4
2.4 33.0 3.0 - - - 1.8 - - -
Jarrahdale 4.8 1.6 0.2 0.4 0.2 0.4 - - 1.4 19.4 1.6 0.2 - 0.2 0.2 0.2 0.2 61.2 16.2 4.2 3.4 21.4 0.8 0.2 0.2 - 5.0 0.2 - -
Medina Research Centre 3.2 1.6 0.3 - - - - - 1.6 7.0 0.3 - - - - 0.1 - 46.2











Pearce RAAF 0.4 0.4 - - - - - - - 14.2 1.0 - - 0.2 - - - 48.4 1.2 12.4 - 13.2 1.0 - - - 0.6 - - -
Perth Airport 1.0 1.4 0.2 - - - - - - 8.6 - - - - - - - 47.2 2.8 6.8 0.4 17.2 1.8 - - - 1.4 0.2 - -
Perth Metro 1.0 1.2 0.2 - - - - - 0.8 8.8 - - - - - - - 50.6 3.4 9.0 0.2 14.8 1.0 - - - 2.6 - - -
Roleystone 2.8 1.6 0.2 - - - - - 1.0 7.6 2.4 - - - - - - 64.4 15.0 4.8 1.0 29.2 - - - 0.6 3.8


Rottnest Island 3.4 0.8 0.4 - - - - - 0.6 6.0 2.8 - - - - - - 43.2 - 2.0 8.6 7.4 1.4 - - - 2.6 - - -
Serpentine 2.4 0.4 0.4 - - - - - 1.4 11.4 0.6 - - - - - - 48.0 10.4 8.0 1.8 20.6 0.2 1.0 4.4 - 3.0 0.2 - -
Swanbourne 1.2 1.8 0.2 0.2 - - - - 4.2 7.2 0.4 0.2 0.2 0.2 - - - 38.6 0.8 12.4 1.8 12.2 2.8 0.2 0.2 - 2.8 - - -

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 marked like this 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).
This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.


Notes

A Monthly 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 11 am on Tuesday 1 July 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