Monday, 1 October 2018 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in September 2018: a very dry month
Rainfall was well below average across Perth, and it was the equal driest September at Perth Metro since recorded commenced in 1993. Daytime temperatures were slightly above average away from the coast while overnight temperatures were below average.
Below average rainfall
- Rainfall was well below average across Perth, with monthly rainfall totals in the 20 mm to 60 mm range recorded of mostly light rainfall at the first half and the end of the month
- Perth Metro recorded 35.2 mm, which equalled its previous record set in 2004 since records commenced in 1993; Jandakot Aero also had its driest September in 44 years of records
- Pearce RAAF had their driest September for 49 years since 1969, while a number of sites in the Perth hills had their driest September for at east 30 years
Below average minimum temperatures
- Mean maximum temperatures were slight above average for the coastal plain sites and the Perth hills , but below average near along the coast and in the offshore islands
- Mean minimum temperatures were half a degree to one degree below average across Perth
- Perth Metro experienced four consecutive warm days with temperature of 25 °C between 20th and 23rd, which is its longest such run for six years since 14 to 17 September 2012
- Cold mornings were experienced at the start and mid-September, and the lowest temperature of the month was 1.4 °C recorded at Bickley on the 15th
Perth Metro
- Total rainfall for Perth Metro was 35.2 mm, which is 42% of the long-term average of 84.8 mm
- The mean daily maximum temperature for Perth Metro was 20.5 °C, which is 0.2 °C above the long-term average of 20.3 °C. The warmest day was 28.0 °C on the 22nd, and the coolest day was on the 5th when the temperature reached 15.7 °C
- The mean daily minimum temperature for Perth Metro was 8.8 °C, which is 0.8 °C below the long-term average of 9.6 °C. The coldest morning was 2.8 °C on the 16th, and the warmest morning was on the 14th when the minimum temperature was 12.9 °C
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
Extremes Maps Records Summaries Daily observations Important notes the top
| Extremes in September 2018 | |
|---|---|
| Hottest day | 28.7 °C at Millendon (Swan Valley) on the 22nd |
| Warmest days on average | 20.9 °C at Millendon (Swan Valley) |
| Coolest days on average | 17.7 °C at Bickley |
| Coldest day | 12.2 °C at Bickley on the 5th |
| Coldest night | 1.4 °C at Bickley on the 15th |
| Coolest nights on average | 7.3 °C at Jandakot Aero |
| Warmest nights on average | 12.4 °C at Rottnest Island |
| Warmest night |
15.3 °C at Garden Island HSF on the 10th 15.3 °C at Rottnest Island on the 24th |
| Warmest on average overall | 15.5 °C at Rottnest Island |
| Coolest on average overall | 12.7 °C at Bickley |
| Wettest overall | 59.4 mm at Jarrahdale |
| Driest overall |
18.2 mm at Mandurah |
| Wettest day | 13.8 mm at Huntly on the 8th |
| Strongest wind gust | 76 km/h at Ocean Reef on the 4th |
Extremes Maps Records Summaries Daily observations Important notes the top
| Record lowest September total rainfall | |||||
|---|---|---|---|---|---|
|
New record (mm) |
Old record |
Years of record |
Average for September |
||
| Jandakot Aero | 28.6 | 31.8 | in 1977 | 44 | 85.4 |
| Perth Metro | 35.2 | = 35.2 | in 2004 | 26 | 84.8 |
| Lowest September total rainfall for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (mm) |
Most recent lower |
Average for September |
|||
| Pearce RAAF | 20.4 | 7.7 | in 1969 | 68.8 | |
| Roleystone | 41.7 | 40.4 | in 1974* | 112.3 | |
| Karragullen North | 41.8 | 0.0 | in 1984* | 105.9 | |
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for September 2018 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for September 2018 |
Diff from average |
Highest for September 2018 |
Mean for September 2018 |
Diff from average |
Lowest for September 2018 |
Total for September 2018 |
Average for September |
Rank of September 2018 |
Fraction of September average |
|||
| Bickley | 17.7 | +0.2 | 25.5 | 22nd | 7.7 | -0.5 | 1.4 | 15th | 46.6 | 124.3 | v low | 37% |
| Garden Island HSF | 18.1 | -0.8 | 23.2 | 22nd | 11.2 | -0.7 | 6.9 | 15th | 21.4 | 65.0 | v low | 33% |
| Jandakot Aero | 20.1 | 0.0 | 27.5 | 22nd | 7.3 | -0.9 | 1.9 | 16th | 28.6 | 85.4 | lowest | 33% |
| Mandurah | 18.9 | -0.1 | 24.2 | 22nd | 10.9 | -0.8 | 5.9 | 15th | 18.2 | 64.2 | v low | 28% |
| Millendon (Swan Valley) | 20.9 | 28.7 | 22nd | 7.4 | 1.6 | 16th | 27.4 | |||||
| Pearce RAAF | 20.7 | +0.6 | 27.9 | 23rd | 7.8 | -1.0 | 2.5 | 16th | 20.4 | 68.8 | v low | 30% |
| Perth Airport | 20.6 | +0.4 | 28.2 | 22nd | 8.1 | -0.8 | 2.6 | 16th | 37.6 | 72.7 | low | 52% |
| Perth Metro | 20.5 | +0.2 | 28.0 | 22nd | 8.8 | -0.8 | 2.8 | 16th | 35.2 | 84.8 | lowest | 42% |
| Rottnest Island | 18.5 | -0.3 | 23.3 | 23rd | 12.4 | -0.5 | 8.3 | 15th | 18.8 | 54.6 | v low | 34% |
| Swanbourne | 19.3 | -0.6 | 25.9 | 22nd | 10.4 | -0.6 | 6.0 | 15th | 37.2 | 81.5 | low | 46% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for September 2018 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Bickley | 16.2 | 17.4 | 17.0 | 15.0 | 12.2 | 13.3 | 14.9 | 16.1 | 19.7 | 17.1 | 14.0 | 13.1 | 14.5 | 15.1 | 16.2 | 17.0 | 14.1 | 17.2 | 19.0 | 23.4 | 23.3 | 25.5 | 24.6 | 19.3 | 18.5 | 17.8 | 19.3 | 20.3 | 17.4 | 21.0 |
| Garden Island HSF | 17.5 | 18.8 | 19.4 | 17.7 | 14.6 | 16.3 | 18.2 | 18.7 | 20.1 | 19.5 | 15.5 | 16.5 | 17.6 | 15.6 | 16.6 | 15.5 | 15.7 | 16.3 | 16.3 | 19.7 | 18.1 | 23.2 | 21.7 | 20.5 | 18.8 | 18.0 | 18.2 | 22.6 | 16.8 | |
| Gosnells City | 20.0 | 20.5 | 18.3 | 16.4 | 19.0 | 20.2 | 22.3 | 18.5 | 18.8 | 20.4 | 19.5 | 17.2 | 19.7 | 20.7 | 26.7 | 25.7 | 28.5 | 26.6 | 22.1 | 21.6 | 23.4 | 24.2 | ||||||||
| Jandakot Aero | 18.5 | 19.7 | 20.2 | 18.6 | 15.6 | 15.9 | 18.2 | 19.7 | 21.5 | 21.1 | 17.1 | 17.1 | 18.3 | 17.3 | 18.5 | 18.6 | 16.8 | 19.4 | 19.3 | 25.6 | 23.8 | 27.5 | 26.7 | 21.4 | 21.1 | 21.4 | 21.6 | 23.7 | 18.0 | 22.0 |
| Karnet | 16.7 | 17.4 | 17.4 | 15.0 | 15.2 | 17.2 | 14.5 | 14.3 | 22.0 | 24.7 | 19.3 | 18.1 | 17.7 | 18.2 | ||||||||||||||||
| Mandurah | 17.9 | 18.1 | 18.8 | 17.5 | 15.1 | 16.5 | 18.0 | 18.6 | 18.9 | 19.0 | 16.7 | 16.7 | 17.7 | 16.5 | 17.5 | 17.3 | 16.4 | 17.9 | 17.3 | 21.8 | 21.3 | 24.2 | 23.1 | 20.6 | 20.3 | 20.0 | 21.0 | 23.1 | 16.7 | 21.5 |
| Millendon (Swan Valley) | 19.5 | 20.3 | 20.7 | 18.8 | 16.4 | 16.3 | 18.3 | 19.9 | 22.8 | 20.1 | 16.3 | 16.7 | 18.5 | 17.8 | 18.3 | 20.0 | 17.3 | 20.2 | 20.4 | 26.2 | 26.3 | 28.7 | 28.4 | 22.9 | 22.5 | 21.9 | 21.9 | 23.4 | 21.7 | 23.2 |
| Pearce RAAF | 18.6 | 20.2 | 20.5 | 18.8 | 16.3 | 15.8 | 19.1 | 19.3 | 23.3 | 20.4 | 17.0 | 16.9 | 18.5 | 17.8 | 18.5 | 19.8 | 17.4 | 19.6 | 20.4 | 26.3 | 25.4 | 27.8 | 27.9 | 22.1 | 21.4 | 20.9 | 22.0 | 23.4 | 22.8 | 22.3 |
| Perth Airport | 19.3 | 20.0 | 20.5 | 18.3 | 16.2 | 15.9 | 18.8 | 19.6 | 22.4 | 20.5 | 17.3 | 16.7 | 17.6 | 18.2 | 19.2 | 19.2 | 17.4 | 19.8 | 20.3 | 26.4 | 25.2 | 28.2 | 27.5 | 21.9 | 21.3 | 21.7 | 22.3 | 23.4 | 20.1 | 22.2 |
| Perth Metro | 19.2 | 20.0 | 20.9 | 18.9 | 15.7 | 16.6 | 19.1 | 20.1 | 22.1 | 20.7 | 16.7 | 17.5 | 19.1 | 17.4 | 19.2 | 17.8 | 17.5 | 19.2 | 19.8 | 26.2 | 25.0 | 28.0 | 26.9 | 22.1 | 21.5 | 20.9 | 21.9 | 23.6 | 19.6 | 21.8 |
| Rottnest Island | 16.9 | 18.4 | 20.0 | 18.1 | 15.6 | 16.6 | 18.4 | 19.9 | 20.1 | 20.2 | 16.4 | 17.0 | 18.2 | 16.9 | 15.9 | 16.7 | 16.8 | 16.9 | 16.3 | 21.4 | 18.5 | 21.7 | 23.3 | 20.2 | 19.9 | 18.4 | 18.3 | 22.0 | 17.1 | 19.3 |
| Swanbourne | 18.1 | 19.5 | 20.1 | 18.7 | 15.9 | 16.5 | 19.2 | 20.3 | 20.7 | 20.3 | 16.4 | 16.8 | 18.3 | 16.7 | 18.6 | 16.8 | 16.8 | 17.8 | 17.2 | 22.1 | 19.5 | 25.9 | 23.6 | 21.2 | 20.4 | 19.3 | 19.9 | 23.2 | 19.7 | 19.3 |
|
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 September 2018 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Bickley | 6.9 | 5.0 | 6.9 | 10.6 | 6.7 | 4.9 | 7.2 | 9.6 | 10.4 | 10.2 | 6.6 | 6.1 | 8.4 | 8.0 | 1.4 | 4.8 | 5.0 | 5.9 | 6.8 | 7.6 | 9.2 | 9.3 | 11.0 | 12.7 | 10.6 | 7.4 | 7.6 | 6.7 | 8.2 | 8.5 |
| Garden Island HSF | 11.2 | 8.2 | 9.0 | 12.9 | 11.2 | 8.4 | 10.5 | 14.1 | 13.8 | 15.3 | 11.7 | 10.8 | 12.3 | 13.6 | 6.9 | 7.0 | 10.2 | 9.6 | 10.8 | 8.9 | 13.0 | 11.0 | 11.6 | 13.2 | 12.3 | 12.4 | 10.4 | 11.1 | 13.2 | 12.6 |
| Gosnells City | 11.2 | 5.9 | 5.6 | 7.5 | 9.6 | 11.0 | 11.3 | 10.2 | 7.0 | 5.2 | 3.8 | 6.1 | 5.3 | 6.7 | 6.5 | 7.0 | 10.4 | 12.3 | 13.9 | 8.0 | 11.0 | 11.0 | 13.9 | |||||||
| Jandakot Aero | 7.9 | 4.0 | 2.6 | 10.9 | 10.0 | 6.1 | 8.3 | 10.7 | 10.6 | 9.0 | 9.2 | 7.5 | 11.1 | 12.1 | 2.8 | 1.9 | 4.3 | 2.2 | 4.3 | 4.0 | 5.6 | 6.5 | 9.3 | 10.2 | 5.5 | 4.5 | 7.9 | 10.0 | 11.3 | 9.4 |
| Karnet | 3.2 | 3.1 | 10.2 | 6.6 | 10.5 | 11.0 | 9.3 | 3.0 | 10.0 | 9.5 | 7.0 | 6.8 | 6.2 | 7.4 | ||||||||||||||||
| Mandurah | 9.4 | 8.5 | 8.5 | 13.5 | 11.0 | 8.7 | 10.9 | 13.5 | 14.7 | 14.5 | 10.7 | 10.3 | 12.2 | 13.1 | 5.9 | 7.0 | 8.6 | 8.3 | 9.1 | 9.0 | 12.9 | 11.7 | 12.4 | 14.6 | 12.1 | 10.6 | 9.9 | 10.4 | 13.5 | 11.7 |
| Millendon (Swan Valley) | 9.9 | 3.8 | 3.7 | 11.0 | 9.1 | 7.7 | 8.1 | 9.8 | 7.3 | 8.3 | 9.3 | 5.5 | 9.5 | 11.7 | 4.9 | 1.6 | 4.0 | 3.4 | 5.9 | 4.4 | 5.4 | 5.3 | 8.3 | 11.2 | 6.9 | 4.9 | 7.4 | 10.3 | 11.5 | 11.9 |
| Pearce RAAF | 11.2 | 6.3 | 4.3 | 11.3 | 10.0 | 7.8 | 7.9 | 9.4 | 7.7 | 8.6 | 9.9 | 5.3 | 10.0 | 11.3 | 5.4 | 2.5 | 4.7 | 2.8 | 6.1 | 4.0 | 5.9 | 6.1 | 8.5 | 12.4 | 6.6 | 4.4 | 8.6 | 10.2 | 12.5 | 12.4 |
| Perth Airport | 9.1 | 6.6 | 4.9 | 11.0 | 9.7 | 7.0 | 8.2 | 10.1 | 9.0 | 9.8 | 9.4 | 6.4 | 11.0 | 12.2 | 5.2 | 2.6 | 4.6 | 3.3 | 5.7 | 6.5 | 6.4 | 7.8 | 10.1 | 12.4 | 6.8 | 5.7 | 9.0 | 10.6 | 10.9 | 11.6 |
| Perth Metro | 10.5 | 4.5 | 5.1 | 10.4 | 10.7 | 8.3 | 9.2 | 10.7 | 10.4 | 9.4 | 10.4 | 7.4 | 11.3 | 12.9 | 4.9 | 2.8 | 6.4 | 4.6 | 7.6 | 6.1 | 8.7 | 8.2 | 11.0 | 12.6 | 8.0 | 7.3 | 9.3 | 10.7 | 11.7 | 12.0 |
| Rottnest Island | 11.6 | 11.2 | 12.3 | 13.9 | 11.1 | 8.7 | 11.2 | 13.9 | 14.6 | 14.6 | 12.6 | 12.1 | 11.8 | 13.0 | 8.3 | 10.4 | 11.3 | 12.0 | 12.3 | 12.2 | 13.9 | 13.8 | 14.0 | 15.3 | 14.4 | 13.3 | 11.4 | 11.3 | 12.6 | 12.6 |
| Swanbourne | 11.1 | 7.0 | 7.2 | 13.3 | 11.2 | 8.1 | 11.2 | 13.6 | 11.2 | 14.0 | 11.5 | 10.3 | 12.1 | 12.8 | 6.0 | 6.3 | 8.6 | 7.8 | 9.5 | 8.2 | 10.9 | 10.6 | 12.0 | 13.3 | 11.5 | 10.0 | 10.0 | 10.9 | 11.4 | 11.7 |
|
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 |
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| Daily rainfall for September 2018 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Anketell | - | - | - | 4.0 | 4.0 | - | 3.2 | 1.8 | 0.8 | 4.6 | 0.8 | 0.2 | → | 2.8 | - | - | 1.2 | - | |||||||||||||
| Bickley | 0.2 | 7.4 | 7.6 | 0.4 | 2.8 | 3.4 | 1.0 | 8.0 | 4.2 | - | 1.2 | 3.0 | - | - | 1.2 | 0.2 | 0.2 | 0.2 | - | - | - | - | 0.2 | - | - | 4.4 | 1.0 | ||||
| Bungendore | - | - | - | 4.4 | 2.6 | 0.6 | 2.4 | 1.4 | 0.4 | 2.2 | 3.2 | 0.2 | 0.8 | 3.2 | - | 0.2 | 1.0 | - | 0.2 | 0.2 | - | 0.2 | - | - | - | 0.2 | - | - | 2.6 | 7.4 | |
| Chidlow | - | - | - | 3.8 | 3.4 | - | 3.1 | 6.0 | → | 3.0 | 4.4 | - | - | 3.0 | - | → | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 2.8 | ||
| Garden Island HSF | 0.8 | 0.2 | - | 4.6 | 3.8 | 0.4 | 1.2 | 0.4 | 0.2 | 0.2 | 2.8 | - | 1.2 | 2.0 | - | - | 0.2 | - | - | - | - | - | - | - | 0.6 | - | - | - | 0.4 | 2.4 | |
| Gidgegannup | - | - | - | 5.8 | 4.0 | 0.2 | 5.8 | 9.0 | 1.0 | 3.2 | 3.4 | - | 2.0 | 4.4 | - | - | 0.8 | - | - | 0.2 | - | - | - | - | - | 0.2 | - | - | 3.0 | 1.8 | |
| Gosnells City | - | - | - | → | → | 9.1 | 2.6 | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3.2 | 3.4 | |||
| Huntly | - | - | - | 4.6 | 6.8 | 2.0 | 4.0 | 13.8 | 0.6 | 1.8 | 8.0 | 0.2 | 0.8 | 5.8 | 1.0 | - | - | - | - | - | - | - | - | 1.4 | 8.2 | ||||||
| Jandakot Aero | - | - | - | 3.4 | 5.0 | - | 2.2 | 2.8 | 0.2 | 2.4 | 1.2 | - | 0.8 | 1.4 | - | - | 1.8 | - | 0.2 | - | - | - | - | - | - | - | - | - | 1.4 | 5.8 | |
| Jarrahdale | - | 0.2 | - | 12.0 | 5.4 | 0.6 | 5.0 | 5.4 | 2.0 | 4.0 | 5.4 | 0.4 | 2.0 | 4.8 | - | 0.2 | 1.0 | 0.2 | 0.2 | 0.2 | - | 0.4 | - | - | 0.6 | 0.2 | 0.2 | - | 1.0 | 8.0 | |
| Karnet | - | - | 8.8 | 8.0 | → | → | 6.6 | 1.8 | → | → | → | 1.1 | → | → | → | → | 0.2 | - | - | - | - | → | → | 0.6 | - | - | - | ||||
| Karragullen North | - | - | - | 6.8 | 4.6 | 0.6 | 1.4 | 5.4 | 1.6 | 4.8 | 5.6 | - | 0.8 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 7.2 | 3.0 | |
| Maida Vale | - | - | - | 10.0 | 6.4 | - | 5.0 | 3.8 | 0.6 | 5.0 | 2.4 | 0.1 | 1.0 | 2.8 | - | - | - | 0.8 | - | 0.2 | 0.2 | - | - | - | 0.2 | - | - | - | 4.0 | 3.8 | |
| Mandurah | - | - | - | 3.6 | 2.4 | 0.4 | 1.6 | 2.4 | - | 0.2 | 2.8 | 0.2 | 0.6 | 0.4 | - | - | 0.2 | 0.2 | - | - | - | - | - | - | 1.6 | - | - | - | - | 1.6 | |
| Midland | - | - | - | 2.4 | 3.2 | - | - | → | → | → | → | → | → | → | → | → | 22.6 | - | |||||||||||||
| Millendon (Swan Valley) | - | - | - | 4.4 | 3.6 | 0.6 | 4.6 | 3.6 | 0.4 | 3.4 | 1.6 | - | 1.0 | 0.6 | - | - | 0.8 | - | - | - | - | - | - | - | 0.2 | - | - | 2.0 | 0.6 | ||
| Mosman Park | - | - | - | 4.2 | 4.0 | 4.2 | 3.0 | → | → | 10.2 | 0.4 | - | 0.6 | 4.8 | → | → | 0.4 | - | - | 0.2 | - | → | → | 0.4 | 0.4 | ||||||
| Mount Solus | - | - | - | 9.0 | 4.2 | 0.2 | 4.8 | 8.6 | 1.6 | 2.2 | 4.0 | - | 0.6 | 3.0 | - | - | 0.6 | - | 0.2 | 0.2 | 0.2 | - | - | - | 0.2 | 0.2 | - | - | 0.8 | 10.4 | |
| Muchea | - | - | - | 6.8 | 9.8 | 0.2 | 2.8 | 1.0 | 0.2 | 1.8 | 8.8 | - | 0.2 | 1.2 | - | - | - | 0.2 | - | 0.2 | - | - | 0.2 | - | 0.2 | - | - | - | 0.8 | 1.0 | |
| Mundaring | - | - | - | 5.2 | 6.0 | 0.2 | 4.6 | 7.6 | 0.8 | 6.2 | 7.8 | - | 1.4 | 3.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3.8 | 1.0 | |
| Noble Falls | 4.6 | 5.0 | 0.4 | 4.6 | 5.6 | 2.0 | 1.0 | 3.4 | 1.8 | 0.6 | 3.0 | 1.0 | |||||||||||||||||||
| Pearce RAAF | - | - | - | 3.6 | 5.0 | 0.6 | 2.6 | 0.4 | 0.8 | 1.0 | 2.6 | - | 0.6 | 0.8 | - | - | - | - | 0.2 | - | - | - | - | - | - | - | 0.2 | - | 1.4 | 0.6 | |
| Perth Airport | - | - | - | 4.0 | 4.6 | 1.0 | 4.0 | 3.4 | - | 4.4 | 1.8 | - | 0.2 | 2.4 | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | 3.8 | 7.0 | |
| Perth Metro | - | - | - | 5.2 | 4.2 | 1.2 | 4.2 | 2.6 | 0.2 | 5.2 | 2.6 | - | 0.8 | 1.8 | - | - | 0.2 | 0.2 | - | - | - | - | - | - | 0.2 | - | - | - | 4.0 | 2.6 | |
| Pinjarra South | - | - | - | 4.8 | 4.4 | 0.4 | 3.0 | 6.4 | - | 1.2 | 4.0 | - | 0.4 | 1.0 | - | - | 1.0 | 0.6 | - | - | - | - | - | - | 0.4 | - | - | - | 0.2 | 6.8 | |
| Roleystone | - | - | - | 3.0 | 4.8 | - | 3.0 | 5.0 | - | 4.6 | 3.6 | - | 1.6 | 2.8 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3.2 | 10.1 | |
| Rottnest Island | 1.4 | - | - | 0.6 | 2.4 | 4.8 | 0.2 | 0.4 | - | 0.4 | 0.2 | - | 2.4 | 1.0 | - | - | 2.4 | - | - | - | - | - | - | - | - | - | - | - | 1.2 | 1.4 | |
| Serpentine | - | - | - | 8.6 | 4.4 | 0.2 | 6.2 | 6.0 | 1.0 | 3.2 | 5.6 | - | 1.0 | 2.2 | - | - | 1.4 | 0.2 | - | - | - | - | - | - | 0.6 | 0.2 | - | - | 0.8 | 5.6 | |
| Swanbourne | 0.2 | - | - | 5.0 | 4.2 | 2.0 | 3.0 | 1.4 | 1.8 | 7.0 | 0.4 | - | 0.6 | 4.8 | - | - | 0.4 | - | - | 0.2 | - | 0.2 | - | 0.2 | 0.4 | - | - | - | 3.0 | 2.4 | |
| Wanneroo | - | - | - | 8.2 | 5.6 | 1.2 | 4.4 | → | → | 6.0 | 8.0 | - | 1.0 | 1.6 | |||||||||||||||||
| Werribee | - | - | - | 2.6 | 4.0 | - | 2.4 | 4.2 | 1.4 | 0.8 | 2.4 | - | 1.0 | 0.6 | - | - | - | 0.2 | - | 0.2 | - | - | - | - | - | 0.2 | - | - | 1.8 | 1.2 | |
| Whiteman Park | - | - | - | 4.4 | 2.6 | 0.8 | 5.6 | 3.4 | 0.4 | 3.2 | 2.6 | - | 1.4 | 1.2 | - | - | 0.6 | ||||||||||||||
|
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 | |||||||||||||||||
Extremes Maps Records Summaries Daily observations Important notes the top
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.
This summary includes 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 1 October 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
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
