Tuesday, 1 September 2015 - Monthly Climate Summary for Perth - Product code IDCKGC11L0
Perth in August 2015: A near average month
Rainfall in August 2015 was near the long-term average for most Perth sites, and day-time and overnight temperatures were also generally near the long-term average.
- Near average rainfall for most sites
- Lowest August day-time temperatures for five years at Perth Metro
- Lowest August overnight temperatures for three years at Perth Metro
Rainfall in August was near average across the Perth metropolitan area. Most of the rainfall was recorded during four periods: on the 1st, from the 7th to 11th, from the 17th to 22nd, and from the 29th to 30th, as cut-off lows and cold fronts impacted the region. Perth Metro recorded a total of 113.0 mm on 15 rain days, which is about 15 percent below the long-term average of 133.1 mm for the Perth official site (rainfall records commencing in 1876).
Mean maximum temperatures were near the long-term average for most sites, ranging from the mid-teens in the hills to the high teens in the remainder of the metropolitan area. Perth Metro recorded a mean maximum temperature of 19.3 °C in August, which is close to the long-term average, but the lowest in August for five years, since 2010 when a mean maximum temperature of 19.1 °C was recorded. Days were mainly cool, with daily maxima in the mid-to-high teens, whilst mild to warm days with daily maximum temperatures in the low to mid-twenties were observed between the 14th and 17th, and between the 26th and 29th. Several sites registered their warmest or equal warmest August day on record on the 15th as temperatures reached the mid-to-high twenties. The highest maximum temperature of the month for the metropolitan area was recorded at both Median Research Centre and Swanbourne on the 15th with 28.0 °C. Perth Metro's lowest maximum temperature in August 2015 was 15.2 °C on the 8th, which continued a run of daily maxima at or above 15.0 °C for 25 months, since July 2013. This exceeded the previous longest such run of 24 months recorded between August 1987 and June 1989.
Mean minimum temperatures were near average for most sites in Perth during August 2015. Perth Metro recorded a mean minimum temperature of 9.1 °C, which is near the long-term average, but the lowest mean minimum for August at the site for three years, since 2012 when a mean minimum temperature of 8.6 °C was recorded. Very cold nights with minima at 5 °C or below were observed on the 2nd and 3rd, the 9th, and the 22nd for coastal plain sites. Cool nights with minima at 10 °C or above were mostly observed during the second half the month, from the 17th to 20th, and from 28th to 30th. Most sites recorded their mildest night of the month on the 17th, with minima in the mid-teens.
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
Extremes Records Summaries Daily observations Important notes the top
| Extremes in August 2015 | |
|---|---|
| Hottest day |
28.0 °C at Medina Research Centre on the 15th 28.0 °C at Swanbourne on the 15th |
| Warmest days on average | 19.8 °C at Swanbourne |
| Coolest days on average | 16.1 °C at Bickley |
| Coldest day | 10.9 °C at Bickley on the 8th |
| Coldest night | -0.5 °C at Karnet on the 9th |
| Coolest nights on average | 7.2 °C at Karnet |
| Warmest nights on average |
12.5 °C at Rottnest Island 10.5 °C at Swanbourne |
| Warmest night |
16.3 °C at Rottnest Island on the 28th 15.6 °C at Pearce RAAF on the 17th |
| Warmest on average overall |
15.5 °C at Rottnest Island 15.1 °C at Swanbourne |
| Coolest on average overall | 11.9 °C at Karnet |
| Wettest overall | 185.0 mm at Karnet |
| Wettest day | 39.6 mm at Bickley on the 20th |
| Strongest wind gust | 89 km/h at Rottnest Island on the 8th |
Extremes Records Summaries Daily observations Important notes the top
| Record highest August temperature | ||||||
|---|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for August |
|||
| Karnet | 25.0 | on the 15th | = 25.0 | on the 26th in 1998 | 50 | 16.0 |
| Medina Research Centre | 28.0 | on the 15th | 26.2 | on the 17th in 2014 | 30 | 18.9 |
| Jandakot Aero | 27.0 | on the 15th | = 27.0 | on the 26th in 1998 | 26 | 18.7 |
| Rottnest Island | 25.3 | on the 15th | 23.3 | on the 17th in 2014 | 26 | 17.9 |
| Swanbourne | 28.0 | on the 15th | 26.2 | on the 6th in 2014 | 22 | 18.9 |
Extremes Records Summaries Daily observations Important notes the top
| Summary statistics for August 2015 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for August 2015 |
Diff from average |
Highest for August 2015 |
Mean for August 2015 |
Diff from average |
Lowest for August 2015 |
Total for August 2015 |
Average for August |
Rank of August 2015 |
Fraction of August average |
|||
| Bickley | 16.1 | 0.0 | 23.8 | 15th | 7.9 | +0.3 | 2.5 | 9th | 143.6 | 171.5 | average | 84% |
| Garden Island HSF | 18.6 | +0.4 | 25.9 | 15th | 11.7 | +0.4 | 5.0 | 22nd | 92.8 | 90.7 | average | 102% |
| Gosnells City | 19.4 | -0.1 | 27.8 | 16th | 9.6 | +0.6 | 3.1 | 9th | 123.9 | 125.8 | average | 98% |
| Jandakot Aero | 19.2 | +0.5 | 27.0 | 15th | 7.8 | +0.7 | 1.9 | 9th | 131.6 | 126.1 | average | 104% |
| Karnet | 16.6 | +0.6 | 25.0 | 15th | 7.2 | +0.9 | -0.5 | 9th | 185.0 | 185.9 | average | 100% |
| Medina Research Centre | 19.5 | +0.6 | 28.0 | 15th | 8.9 | +0.7 | 2.4 | 9th | ||||
| Pearce RAAF | 19.3 | +0.9 | 26.8 | 15th | 8.8 | +0.6 | 1.1 | 3rd | 93.4 | 104.0 | average | 90% |
| Perth Airport | 19.4 | +0.8 | 27.4 | 15th | 9.2 | +1.2 | 3.3 | 9th | 97.4 | 117.5 | average | 83% |
| Perth Metro | 19.3 | +0.2 | 27.0 | 15th | 9.1 | +0.8 | 4.3 | 3rd | 113.0 | 133.1 | average | 85% |
| Rottnest Island | 18.5 | +0.6 | 25.3 | 15th | 12.5 | +0.1 | 7.3 | 9th | 104.4 | 101.8 | average | 103% |
| Swanbourne | 19.8 | +0.9 | 28.0 | 15th | 10.5 | +0.4 | 5.4 | 9th | 106.0 | 115.1 | low | 92% |
|
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. Observations for “Rottnest Island” are taken from the current site at Rottnest Island (Bureau number 009193). Comparisons are made against combined data from the current site(which opened in 1995) and the previous site at Rottnest Island Lighthouse (009038),which ran from 1879 to 1994. | ||||||||||||
Extremes Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for August 2015 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
| Bickley | 13.8 | 13.5 | 15.0 | 15.7 | 15.5 | 16.9 | 14.7 | 10.9 | 11.4 | 14.9 | 14.8 | 14.8 | 14.5 | 20.2 | 23.8 | 20.7 | 17.8 | 17.3 | 16.8 | 15.9 | 11.7 | 14.6 | 15.4 | 15.8 | 16.2 | 18.2 | 22.1 | 18.4 | 17.6 | 15.6 | 13.6 |
| Garden Island HSF | 16.4 | 16.8 | 17.3 | 18.3 | 18.3 | 19.0 | 18.5 | 15.5 | 16.8 | 18.1 | 16.4 | 17.5 | 15.7 | 18.0 | 25.9 | 22.2 | 21.9 | 19.3 | 19.6 | 17.2 | 16.6 | 16.7 | 16.7 | 18.6 | 19.6 | 20.8 | 25.5 | 20.1 | 20.3 | 16.9 | 17.3 |
| Gosnells City | 18.1 | 17.8 | 18.8 | 18.4 | 18.8 | 20.5 | 18.5 | 15.2 | 14.4 | 19.0 | 17.7 | 17.7 | 16.3 | 27.8 | 22.0 | 20.6 | 21.1 | 19.0 | 16.0 | 17.4 | 19.4 | 19.5 | 19.8 | 22.0 | 26.0 | 21.1 | 21.7 | 19.2 | 18.4 | ||
| Jandakot Aero | 17.4 | 16.8 | 17.8 | 17.8 | 18.5 | 20.1 | 18.1 | 14.8 | 15.7 | 19.2 | 17.6 | 17.0 | 16.1 | 22.5 | 27.0 | 23.0 | 22.0 | 20.0 | 20.5 | 19.0 | 16.6 | 17.1 | 18.6 | 18.7 | 19.8 | 21.8 | 26.0 | 20.2 | 20.5 | 18.4 | 17.3 |
| Karnet | 14.5 | 14.6 | 16.2 | 16.4 | 15.9 | 16.5 | 15.5 | 11.9 | 12.0 | 15.9 | 14.6 | 14.0 | 14.5 | 20.2 | 25.0 | 22.5 | 20.5 | 17.8 | 17.0 | 15.0 | 12.7 | 15.1 | 15.8 | 16.4 | 17.0 | 19.2 | 23.6 | 17.4 | 17.8 | 15.6 | 14.7 |
| Medina Research Centre | 18.0 | 17.4 | 18.2 | 18.6 | 18.6 | 20.2 | 19.0 | 15.2 | 16.6 | 18.6 | 18.0 | 17.6 | 16.2 | 22.0 | 28.0 | 22.7 | 20.6 | 20.9 | 18.4 | 16.5 | 17.0 | 19.1 | 19.1 | 20.3 | 22.6 | 26.5 | |||||
| Pearce RAAF | 17.2 | 16.0 | 17.2 | 17.7 | 18.0 | 20.1 | 17.7 | 14.7 | 15.1 | 18.8 | 18.1 | 18.8 | 18.3 | 23.4 | 26.8 | 24.2 | 20.3 | 20.2 | 20.3 | 19.0 | 15.6 | 17.5 | 18.2 | 18.7 | 19.4 | 21.7 | 25.6 | 22.7 | 21.6 | 19.1 | 17.3 |
| Perth Airport | 17.7 | 16.7 | 18.0 | 18.4 | 18.4 | 20.1 | 18.6 | 15.2 | 14.7 | 18.6 | 18.2 | 18.3 | 17.3 | 23.4 | 27.4 | 23.4 | 20.7 | 19.9 | 20.1 | 18.6 | 16.2 | 17.6 | 19.0 | 19.0 | 19.6 | 21.5 | 25.5 | 22.2 | 21.9 | 18.9 | 17.0 |
| Perth Metro | 18.1 | 17.0 | 18.3 | 18.1 | 18.3 | 19.9 | 18.3 | 15.2 | 15.5 | 18.8 | 18.3 | 17.2 | 17.1 | 23.1 | 27.0 | 23.3 | 20.6 | 20.1 | 20.2 | 18.4 | 16.2 | 17.3 | 18.8 | 19.0 | 19.5 | 21.3 | 25.1 | 21.6 | 21.3 | 18.7 | 17.6 |
| Rottnest Island | 16.8 | 15.3 | 16.2 | 16.8 | 18.0 | 19.4 | 18.6 | 15.7 | 16.4 | 18.8 | 16.9 | 16.9 | 16.2 | 18.0 | 25.3 | 21.3 | 20.6 | 19.4 | 19.9 | 18.2 | 16.9 | 16.2 | 16.1 | 17.2 | 19.4 | 21.2 | 24.4 | 20.2 | 20.6 | 17.7 | 17.4 |
| Swanbourne | 19.1 | 18.0 | 19.7 | 19.2 | 19.7 | 20.9 | 18.8 | 15.4 | 16.8 | 18.9 | 19.0 | 18.4 | 17.4 | 19.8 | 28.0 | 22.7 | 20.6 | 20.6 | 20.6 | 18.3 | 16.3 | 17.5 | 19.4 | 19.3 | 20.4 | 22.2 | 26.3 | 21.0 | 21.3 | 18.9 | 18.2 |
|
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 August 2015 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
| Bickley | 8.5 | 5.8 | 5.5 | 6.2 | 6.6 | 6.0 | 8.4 | 8.1 | 2.5 | 6.2 | 8.0 | 6.9 | 10.3 | 7.0 | 9.0 | 11.2 | 13.3 | 11.7 | 11.3 | 9.9 | 8.0 | 4.6 | 4.8 | 7.2 | 5.0 | 6.5 | 7.7 | 11.7 | 11.1 | 10.0 | 6.9 |
| Garden Island HSF | 12.6 | 10.1 | 9.8 | 10.6 | 9.4 | 11.4 | 12.6 | 12.5 | 6.6 | 9.2 | 12.5 | 9.9 | 12.8 | 11.4 | 11.3 | 14.4 | 15.8 | 16.0 | 16.1 | 12.0 | 13.0 | 5.0 | 9.3 | 9.8 | 9.9 | 11.4 | 12.1 | 14.1 | 15.1 | 14.6 | 11.3 |
| Gosnells City | 10.1 | 5.5 | 5.5 | 9.8 | 8.5 | 10.0 | 12.9 | 10.0 | 3.1 | 5.0 | 10.2 | 6.5 | 7.6 | 11.1 | 12.6 | 11.5 | 11.6 | 11.0 | 4.5 | 7.9 | 10.5 | 9.8 | 12.0 | 13.0 | 13.5 | 12.8 | 11.9 | 9.9 | |||
| Jandakot Aero | 10.7 | 2.6 | 2.4 | 7.0 | 4.7 | 7.2 | 12.2 | 6.8 | 1.9 | 7.4 | 9.0 | 3.7 | 11.1 | 5.0 | 6.5 | 7.8 | 15.2 | 12.6 | 12.7 | 12.0 | 10.2 | 2.1 | 2.4 | 7.9 | 7.0 | 5.3 | 4.6 | 11.5 | 12.8 | 11.3 | 9.4 |
| Karnet | 8.9 | 4.5 | 5.2 | 6.9 | 7.6 | 9.5 | 7.2 | -0.5 | 1.5 | 7.7 | 4.2 | 10.0 | 4.6 | 6.8 | 7.8 | 13.9 | 12.0 | 10.1 | 9.5 | 6.5 | 1.2 | 5.9 | 7.0 | 6.1 | 6.4 | 8.7 | 9.0 | 11.1 | 10.2 | 5.9 | |
| Medina Research Centre | 11.5 | 7.0 | 3.3 | 8.0 | 5.1 | 8.8 | 12.3 | 10.9 | 2.4 | 7.7 | 9.6 | 5.6 | 10.4 | 6.7 | 7.9 | 11.7 | 15.4 | 14.2 | 14.5 | 12.7 | 11.0 | 4.0 | 4.5 | 8.0 | 8.1 | 9.0 | 6.1 | 11.6 | |||
| Pearce RAAF | 11.6 | 2.3 | 1.1 | 8.4 | 5.6 | 8.7 | 11.8 | 7.8 | 3.9 | 6.0 | 9.4 | 3.2 | 9.8 | 5.1 | 12.3 | 9.3 | 15.6 | 12.5 | 11.9 | 11.9 | 9.8 | 3.6 | 7.7 | 9.4 | 9.7 | 11.5 | 12.6 | 10.2 | 9.7 | 12.2 | 7.2 |
| Perth Airport | 11.7 | 4.1 | 4.2 | 8.0 | 6.2 | 8.8 | 11.9 | 8.2 | 3.3 | 7.6 | 9.6 | 4.7 | 12.9 | 8.3 | 12.7 | 11.6 | 15.4 | 11.6 | 10.1 | 11.6 | 10.0 | 4.0 | 6.6 | 9.5 | 8.6 | 9.8 | 11.6 | 12.4 | 11.1 | 11.4 | 6.9 |
| Perth Metro | 11.7 | 6.0 | 4.3 | 8.2 | 6.6 | 9.6 | 12.1 | 8.4 | 4.6 | 8.0 | 10.1 | 5.5 | 11.8 | 6.1 | 7.9 | 9.1 | 15.4 | 12.2 | 13.3 | 11.5 | 9.7 | 4.3 | 5.2 | 8.7 | 8.1 | 7.9 | 9.1 | 11.7 | 12.3 | 13.8 | 8.7 |
| Rottnest Island | 12.6 | 11.1 | 10.9 | 11.8 | 10.5 | 12.2 | 13.1 | 12.2 | 7.3 | 9.7 | 13.9 | 12.2 | 12.9 | 12.6 | 14.1 | 15.9 | 13.4 | 15.5 | 14.0 | 11.4 | 12.6 | 9.2 | 10.2 | 10.7 | 10.9 | 12.9 | 14.1 | 16.3 | 15.9 | 14.4 | 11.9 |
| Swanbourne | 10.3 | 6.1 | 6.2 | 9.1 | 8.1 | 10.0 | 11.8 | 12.4 | 5.4 | 9.0 | 11.1 | 8.6 | 12.6 | 8.2 | 11.8 | 13.1 | 15.3 | 15.3 | 13.8 | 11.4 | 11.7 | 7.0 | 7.1 | 9.4 | 9.2 | 9.9 | 11.5 | 12.0 | 13.6 | 14.2 | 9.8 |
|
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 August 2015 | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | ||
| Anketell | 1.8 | - | - | - | - | - | 0.6 | 15.8 | 8.8 | 2.0 | 2.4 | - | - | 2.0 | - | - | 12.4 | 17.0 | 0.6 | 15.6 | 6.4 | 17.0 | 0.2 | - | - | - | - | - | 10.2 | 17.2 | 0.6 | |
| Bickley | 0.2 | - | - | - | - | - | 4.0 | 9.8 | 20.4 | 5.2 | 5.2 | - | 0.2 | - | 0.2 | - | 10.0 | 10.8 | 2.2 | 39.6 | 3.2 | 16.0 | 1.6 | - | 0.2 | - | - | - | 2.0 | 12.6 | 0.2 | |
| Bungendore | - | - | - | - | - | - | 2.0 | 12.2 | 13.2 | 1.0 | 3.8 | 0.2 | - | 0.4 | 0.2 | - | 13.6 | 22.2 | - | 2.8 | 14.6 | 1.0 | 0.2 | - | - | - | 0.2 | 1.2 | 22.0 | 0.2 | ||
| Chidlow | 9.2 | - | - | - | - | - | 7.2 | 4.8 | → | 13.0 | - | 7.2 | - | - | - | → | 6.6 | 6.2 | 2.6 | 24.8 | - | 7.8 | - | - | - | - | - | - | 9.2 | → | 10.8 | |
| Garden Island HSF | 0.2 | - | - | - | - | - | - | 14.2 | 5.6 | 2.2 | 2.0 | - | 0.6 | 2.6 | - | - | 13.0 | 2.4 | - | 12.0 | 5.6 | 17.2 | 0.2 | - | - | - | - | 1.8 | 4.2 | 7.8 | 1.2 | |
| Gidgegannup | 1.4 | - | - | - | - | - | 7.2 | 1.4 | 11.2 | 2.0 | 2.6 | - | - | - | - | - | 5.4 | 7.8 | 3.4 | 30.6 | 3.2 | 17.6 | 0.2 | - | - | - | - | - | 1.6 | 13.6 | 0.2 | |
| Gosnells City | 0.1 | - | - | - | - | - | 1.2 | → | → | 6.4 | 3.4 | - | - | - | → | → | 8.8 | 11.0 | 2.0 | 22.8 | 3.0 | → | → | → | → | 12.0 | - | - | 5.0 | 11.2 | 0.4 | |
| Jandakot Aero | 1.6 | - | - | - | - | - | 0.8 | 21.0 | 6.8 | 1.2 | 6.0 | - | - | 0.4 | - | - | 10.4 | 12.6 | 0.4 | 27.4 | 6.8 | 11.0 | 0.2 | - | - | - | - | - | 7.2 | 17.8 | - | |
| Jarrahdale | 2.8 | - | 0.4 | - | - | 0.2 | 1.4 | 11.2 | 13.4 | 0.4 | 2.6 | - | - | 0.6 | 0.2 | - | 10.8 | 15.8 | - | 6.2 | 20.2 | 0.4 | - | - | 0.2 | 0.2 | - | 6.0 | 22.4 | 0.4 | ||
| Karnet | 4.6 | - | - | - | - | - | 1.2 | 18.4 | 17.8 | 12.0 | 4.2 | 0.1 | 0.1 | 0.5 | - | - | 11.0 | 10.0 | 6.0 | 25.2 | 8.5 | → | 16.0 | - | - | - | - | - | 12.4 | 19.2 | - | |
| Karragullen North | 0.2 | - | - | - | - | - | 2.2 | 8.6 | 11.6 | 3.0 | 3.0 | 0.2 | - | - | - | - | 11.2 | 15.4 | 2.4 | 24.0 | 4.0 | 16.6 | 1.0 | 0.2 | - | - | - | - | 1.8 | 14.0 | 0.4 | |
| Maida Vale | - | - | - | - | - | - | 1.8 | 9.4 | 8.0 | 7.8 | 8.0 | 0.2 | - | - | - | - | 7.2 | 7.0 | 2.0 | 26.6 | 3.2 | 19.4 | 0.2 | - | - | - | - | - | 2.0 | 11.8 | 1.8 | |
| Midland | - | - | - | - | - | - | - | → | → | 18.2 | - | - | - | - | → | → | 7.4 | 4.1 | 2.4 | 20.8 | 5.2 | → | → | 11.2 | - | - | - | - | → | → | 13.7 | |
| Mount Helena | 20.4 | 7.0 | 5.4 | 7.8 | 5.0 | 5.2 | 5.8 | 7.0 | 4.4 | 24.8 | 3.6 | 12.8 | 0.2 | 3.2 | 8.4 | |||||||||||||||||
| Mundaring | 6.0 | - | - | - | - | - | 4.6 | 8.6 | 8.4 | 5.4 | 9.2 | 0.2 | - | - | - | - | 8.4 | 9.6 | 3.0 | 26.0 | 2.0 | 16.0 | 0.2 | 0.2 | - | - | - | - | 28.0 | 12.4 | ||
| Pearce RAAF | 2.0 | - | - | - | - | - | 4.6 | 0.4 | 13.0 | 1.6 | 3.4 | - | - | - | - | - | 5.4 | 7.0 | 5.6 | 14.8 | 4.8 | 16.8 | - | - | - | - | - | - | 3.2 | 10.8 | - | |
| Perth Airport | 0.4 | - | - | - | - | - | 1.0 | 5.0 | 7.0 | 3.6 | 3.8 | - | - | - | - | - | 6.8 | 3.6 | 2.4 | 25.6 | 3.0 | 22.4 | - | - | - | - | - | - | 1.2 | 11.6 | - | |
| Perth Metro | 0.2 | - | - | - | - | - | 1.0 | 6.4 | 12.6 | 4.0 | 3.8 | - | - | - | - | - | 5.6 | 5.0 | 1.0 | 16.8 | 7.0 | 29.6 | - | - | - | - | - | 4.2 | 15.6 | 0.2 | ||
| Pickering Brook | 3.0 | 10.8 | 17.8 | 3.0 | 7.4 | 9.6 | 12.0 | 3.4 | 28.8 | 2.6 | 18.4 | 1.0 | 1.4 | 12.6 | ||||||||||||||||||
| Roleystone | - | - | - | - | - | - | 3.2 | 7.1 | 21.5 | 3.6 | 3.1 | - | - | - | - | - | 10.8 | 20.2 | 2.2 | 25.6 | 4.2 | 18.6 | - | 0.8 | - | - | - | - | 2.4 | 16.1 | 0.4 | |
| Rottnest Island | - | - | - | - | - | - | 0.2 | 14.4 | 7.4 | 7.0 | 0.4 | - | 0.6 | 2.0 | - | - | 7.6 | 2.6 | 0.2 | 12.0 | 2.8 | 15.8 | 0.8 | - | - | - | - | 16.6 | 9.6 | 4.2 | 0.2 | |
| Serpentine | 1.6 | - | - | - | - | - | 0.2 | 11.8 | 9.6 | 3.6 | 4.2 | - | - | - | - | - | 9.4 | 11.4 | 0.2 | 19.6 | 7.4 | 18.2 | 0.6 | 0.2 | - | - | - | - | 4.2 | 13.0 | - | |
| Swanbourne | 0.4 | - | - | - | - | - | 1.2 | 7.2 | 8.6 | 6.0 | 3.6 | - | - | 0.2 | - | - | 7.2 | 10.6 | 0.4 | 14.6 | 8.8 | 19.2 | 1.0 | - | - | - | - | - | 2.0 | 15.0 | - | |
| Werribee | 0.4 | - | - | 0.2 | - | - | 7.0 | 3.2 | 9.4 | 2.2 | 2.0 | 0.2 | - | - | - | 0.2 | 6.0 | 6.0 | 2.8 | 13.0 | 2.0 | 13.0 | 1.6 | 0.2 | - | - | - | - | 4.8 | 5.0 | - | |
|
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 | ||||||||||||||||||
Extremes Records Summaries Daily observations Important notes the top
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 9 am on Tuesday 1 September 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.
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
- 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
