Tuesday, 2 June 2015 - Seasonal Climate Summary for Perth - Product code IDCKGC21L0
Perth in autumn 2015: Cool autumn days and nights
- Lowest day-time temperatures for seven years at Perth Metro
- Lowest night-time temperature for six years at Perth Metro
Rainfall in autumn 2015 was near average for most sites in the Perth metropolitan area and generally ranged from 130 mm to 160 mm on the coastal plain and offshore islands, to 240 mm in the hills. Bickley recorded 241.4 mm of total autumn rainfall, which was the highest seasonal rainfall in the Perth area. Perth Metro recorded a total of 153.4 mm on 19 rain days, which was its driest autumn for three years, since autumn 2012 when 118.4 mm was recorded.
Mean maximum temperatures were near average to below average across Perth in autumn 2015. A daily maximum temperature of 41.5 °C at Pearce RAAF on 12 March was the highest temperature in the Perth metropolitan area in autumn, whilst the lowest maximum temperature for autumn 2015 was 12.5 °C at Bickley on 16 May. Perth Metro recorded a mean maximum of 25.4 °C, which is its lowest autumn mean maximum for seven years, since autumn 2008 when a mean maximum of 25.4 °C was recorded.
Mean minimum temperatures were slightly below average across the Perth metropolitan area in autumn 2015. The coldest night was either on 5 May or 28 May for coastal palin sites. Jandakot Aerodrome recorded the lowest temperature in the Perth area with minima of 1.5 °C on 28 May. The highest minimum temperature in Perth in autumn 2015 was 23.5 °C at Bickley on 13 March. Perth Metro recorded a mean minimum temperature of 13.1 °C this autumn, which was the lowest autumn mean minimum for six years, since autumn 2009 when a mean minimum of 12.7 °C was recorded.
Extremes Records Summaries Important notes the top
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
| Extremes in autumn 2015 | |
|---|---|
| Hottest day | 41.5 °C at Pearce RAAF on 12 Mar |
| Warmest days on average | 26.3 °C at Pearce RAAF |
| Coolest days on average | 22.5 °C at Bickley |
| Coldest day | 12.5 °C at Bickley on 16 May |
| Coldest night | 1.5 °C at Jandakot Aero on 28 May |
| Coolest nights on average | 11.7 °C at Bickley |
| Warmest nights on average |
16.5 °C at Rottnest Island 14.3 °C at Swanbourne |
| Warmest night | 23.5 °C at Bickley on 13 Mar |
| Warmest on average overall | 20.0 °C at Swanbourne |
| Coolest on average overall | 17.1 °C at Bickley |
| Wettest overall | 241.4 mm at Bickley |
| Driest overall | 130.7 mm at Medina Research Centre |
| Wettest day |
60.6 mm at Bickley on 18 May 60.6 mm at Karragullen North on 18 May |
| Strongest wind gust | 111 km/h at Rottnest Island on 16 May |
Extremes Records Summaries Important notes the top
Extremes Records Summaries Important notes the top
| Summary statistics for autumn 2015 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for autumn 2015 |
Diff from average |
Highest for autumn 2015 |
Mean for autumn 2015 |
Diff from average |
Lowest for autumn 2015 |
Total for autumn 2015 |
Average for autumn |
Rank of autumn 2015 |
Fraction of autumn average |
|||
| Bickley | 22.5 | -1.2 | 36.5 | 12 Mar | 11.7 | -0.8 | 5.3 | 20 May | 241.4 | 211.7 | average | 114% |
| Garden Island HSF | 23.5 | -0.7 | 33.7 | 13 Mar | 15.5 | -0.6 | 9.8 | 23 May | 131.6 | 134.6 | average | 98% |
| Jandakot Aero | 25.3 | -0.5 | 36.4 | 12 Mar | 11.9 | -0.5 | 1.5 | 28 May | 146.4 | 166.2 | average | 88% |
| Medina Research Centre | 25.3 | -0.4 | 35.2 | 13 Mar | 13.0 | -0.3 | 4.3 | 5 May | 130.7 | 160.1 | low | 82% |
| Pearce RAAF | 26.3 | 0.0 | 41.5 | 12 Mar | 12.9 | -0.5 | 1.7 | 5 May | 139.8 | 134.8 | average | 104% |
| Perth Airport | 25.7 | 0.0 | 38.6 | 12 Mar | 12.8 | -0.3 | 3.0 | 5 May | 145.2 | 156.2 | average | 93% |
| Perth Metro | 25.4 | -0.6 | 37.9 | 12 Mar | 13.1 | -0.6 | 3.7 | 28 May | 153.4 | 180.5 | average | 85% |
| Rottnest Island | 23.1 | -0.6 | 31.1 | 13 Mar | 16.5 | -0.6 | 10.0 | 4 May | 141.6 | 148.1 | average | 96% |
| Swanbourne | 25.6 | 0.0 | 37.2 | 12 Mar | 14.3 | -0.8 | 7.1 | 28 May | 184.0 | 153.0 | average | 120% |
Extremes Records Summaries Important notes the top
Notes
A Seasonal 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 10 am on Tuesday 2 June 2015. 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.
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
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence
