Thursday, 9 January 2020 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in December 2019: very hot first half of December
Daytime and overnight temperatures were well above average across Greater Perth, and it was the warmest December on record for most sites. It was particularly hot during the first half of December, and Perth Metro had four days with temperatures over 40 degree. Monthly rainfall was below average across Perth.
Below average rainfall
- Monthly rainfall totals were generally less than 5 mm, and up to about 10 mm along the Perth hills
- There were two wet days as a pair of weak cold fronts produced light rainfall in the 24 hours to 9am on the 8th and 20th
Above average temperatures across Perth
- It was the warmest December on record for most sites in terms of mean temperatures
- Mean maximum temperatures were 2-5 °C above average across Greater Perth, and several sites had their warmest December on record
- Perth Metro's mean maximum temperature was 33.1 °C, which was its December record and 1.7 °C higher than its previous December record in 1999
- Prior to this December, mean maximum temperatures in December at Perth city had not reached 32 °C since record commenced in 1897, the previous highest was 31.7 °C in 1931 recorded at Perth Regional Office
- The first half of December was particularly hot, and Perth Metro had two spells with temperature over 35 °C: between the 2nd and 6th, and between the 10th and 16th
- Perth Metro and Perth Airport not only recorded their first run of three consecutive days of over 40 °C (between the 13th and 15th) in December, but also doubled their previous record count of 40 °C days with four and eight respectively
- Mean minimum temperatures were 2-3 °C above average across Perth, and several sites excessed their previous December record set in 2011
- Perth Metro's mean maximum temperature was 18.3 °C, which just exceeded its previous December record at 18.2 °C in 2011
Perth Metro
- Total rainfall for Perth Metro was 2.4 mm, which is 23% of the long-term average of 10.6 mm
- The mean daily maximum temperature for Perth Metro was 33.1 °C, 4.0 °C above the long-term average of 29.1 °C. The warmest day was 41.6 °C on the 3rd, and the coolest day was on the 30th when the temperature reached 24.9 °C
- The mean daily minimum temperature for Perth Metro was 18.3 °C, 2.0 °C above the long-term average of 16.3 °C. The coldest morning was 12.9 °C on the 31st, and the warmest morning was on the 6th when the minimum temperature was 24.6 °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 December 2019 | |
|---|---|
| Hottest day | 43.9 °C at Pearce RAAF on the 15th |
| Warmest days on average | 35.5 °C at Pearce RAAF |
| Coolest days on average | 28.0 °C at Garden Island HSF |
| Coldest day | 20.7 °C at Bickley on the 19th |
| Coldest night | 9.6 °C at Bickley on the 1st |
| Coolest nights on average | 16.5 °C at Bickley |
| Warmest nights on average | 20.1 °C at Mandurah |
| Warmest night | 27.1 °C at Pearce RAAF on the 6th |
| Warmest on average overall | 26.2 °C at Pearce RAAF |
| Coolest on average overall | 23.8 °C at Garden Island HSF |
| Wettest overall | 11.0 mm at Jarrahdale |
| Driest overall | 0.4 mm at Mandurah |
| Wettest day | 9.8 mm at Huntly on the 20th |
| Strongest wind gust | 76 km/h at Pearce RAAF on the 10th |
Extremes Maps Records Summaries Daily observations Important notes the top
| Record highest December mean daily maximum temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for December |
||
| Perth Airport | 33.9 | 32.4 | in 1999 | 75 | 29.0 |
| Pearce RAAF | 35.5 | 34.1 | in 1972 | 59 | 30.4 |
| Jandakot Aero | 32.8 | 31.5 | in 2009 | 29 | 29.1 |
| Rottnest Island | 28.1 | 27.8 | in 1999 | 28 | 25.0 |
| Bickley | 31.9 | 30.3 | in 2009 | 25 | 28.1 |
| Perth Metro | 33.1 | 31.4 | in 1999 | 25 | 29.1 |
| Highest December mean daily maximum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent higher |
Average for December |
|||
| Karnet | 31.8 | 32.6 | in 1993 | 28.1 | |
| Swanbourne | 30.3 | 30.5 | in 1999 | 27.8 | |
| Record highest December mean daily minimum temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for December |
||
| Jandakot Aero | 17.7 | 16.7 | in 2011 | 29 | 14.7 |
| Rottnest Island | 19.8 | 19.0 | in 2011 | 28 | 17.6 |
| Swanbourne | 19.5 | 18.3 | in 2011 | 26 | 16.5 |
| Bickley | 16.5 | 15.4 | in 2012 | 25 | 13.6 |
| Perth Metro | 18.3 | 18.2 | in 2011 | 25 | 16.3 |
| Highest December mean daily minimum temperature for at least 20 years | |||||
|---|---|---|---|---|---|
|
Observed (°C) |
Most recent higher |
Average for December |
|||
| Perth Airport | 17.7 | 17.8 | in 1977 | 14.9 | |
| Record highest December mean temperature | |||||
|---|---|---|---|---|---|
|
New record (°C) |
Old record |
Years of record |
Average for December |
||
| Perth Airport | 25.8 | 24.8 | in 1999 | 75 | 22.0 |
| Pearce RAAF | 26.2 | 25.1 | in 1977 | 59 | 22.5 |
| Jandakot Aero | 25.3 | 24.0 | in 1999 | 29 | 21.9 |
| Rottnest Island | 23.9 | 23.4 | in 1999 | 28 | 21.3 |
| Swanbourne | 24.9 | 24.1 | in 2011 | 26 | 22.2 |
| Bickley | 24.2 | 22.3 | in 2012 | 25 | 20.9 |
| Perth Metro | 25.7 | 24.6 | in 1999 | 25 | 22.7 |
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for December 2019 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for December 2019 |
Diff from average |
Highest for December 2019 |
Mean for December 2019 |
Diff from average |
Lowest for December 2019 |
Total for December 2019 |
Average for December |
Rank of December 2019 |
Fraction of December average |
|||
| Bickley | 31.9 | +3.8 | 39.6 | 15th | 16.5 | +2.9 | 9.6 | 1st | 8.0 | 14.6 | average | 55% |
| Garden Island HSF | 28.0 | +2.6 | 38.3 | 13th | 19.7 | +2.5 | 13.8 | 1st | 1.4 | 10.4 | low | 13% |
| Jandakot Aero | 32.8 | +3.7 | 40.4 | 13th | 17.7 | +3.0 | 11.3 | 9th | 3.8 | 10.6 | average | 36% |
| Karnet | 31.8 | +3.7 | 38.0 | 15th | 10.2 | 1st | 8.2 | 18.8 | average | 44% | ||
| Mandurah | 30.3 | +3.3 | 39.5 | 12th | 20.1 | +3.0 | 13.3 | 1st | 0.4 | 15.9 | v low | 3% |
| Millendon (Swan Valley) | 34.6 | 42.2 | 15th | 16.9 | 11.1 | 9th | 2.8 | |||||
| Pearce RAAF | 35.5 | +5.1 | 43.9 | 15th | 16.9 | +2.4 | 10.6 | 9th | 0.8 | 10.9 | low | 7% |
| Perth Airport | 33.9 | +4.9 | 41.6 | 15th | 17.7 | +2.8 | 12.1 | 28th | 2.2 | 11.2 | low | 20% |
| Perth Metro | 33.1 | +4.0 | 41.6 | 3rd | 18.3 | +2.0 | 12.9 | 31st | 2.4 | 10.6 | low | 23% |
| Rottnest Island | 28.1 | +3.1 | 37.9 | 13th | 19.8 | +2.2 | 14.9 | 1st | 1.8 | 10.9 | low | 17% |
| Swanbourne | 30.3 | +2.5 | 39.3 | 13th | 19.5 | +3.0 | 14.0 | 31st | 2.8 | 11.1 | average | 25% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for December 2019 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 30.0 | 32.7 | 37.7 | 36.7 | 37.6 | 37.1 | 23.9 | 24.3 | 28.7 | 33.4 | 34.9 | 36.2 | 37.9 | 38.4 | 39.6 | 37.7 | 36.2 | 33.8 | 20.7 | 24.8 | 32.4 | 28.1 | 31.4 | 34.0 | 34.7 | 30.0 | 28.4 | 28.7 | 23.9 | 24.7 | 29.2 |
| Garden Island HSF | 28.1 | 33.0 | 37.7 | 26.0 | 30.8 | 34.8 | 25.0 | 21.6 | 23.4 | 27.7 | 37.8 | 37.2 | 38.3 | 29.2 | 28.9 | 26.6 | 26.1 | 29.3 | 24.4 | 26.3 | 29.6 | 23.1 | 24.3 | 27.4 | 26.7 | 25.6 | 23.8 | 23.7 | 25.4 | 21.8 | 23.9 |
| Gosnells City | 33.5 | 36.0 | 40.5 | 41.0 | 40.1 | 27.2 | 28.0 | 31.0 | 37.0 | 38.0 | 40.5 | 36.5 | 35.5 | 27.5 | 34.1 | 29.6 | 32.8 | 36.6 | 30.0 | 28.5 | 29.3 | 26.5 | 26.1 | 30.6 | |||||||
| Jandakot Aero | 33.4 | 35.1 | 40.3 | 37.0 | 40.3 | 39.5 | 26.4 | 25.2 | 29.5 | 35.8 | 38.0 | 38.6 | 40.4 | 39.3 | 39.7 | 38.2 | 34.9 | 33.5 | 25.0 | 25.8 | 32.6 | 27.3 | 30.5 | 32.2 | 34.3 | 28.0 | 27.4 | 27.0 | 26.0 | 25.2 | 29.0 |
| Karnet | 30.8 | 33.4 | 37.8 | 37.0 | 37.5 | 24.0 | 24.0 | 28.5 | 33.6 | 34.4 | 37.3 | 38.0 | 37.1 | 35.4 | 33.8 | 27.2 | 31.7 | 34.6 | 34.6 | 30.1 | 30.5 | 27.8 | 23.4 | 24.3 | 28.2 | ||||||
| Mandurah | 31.6 | 33.8 | 35.6 | 33.1 | 36.4 | 33.1 | 24.4 | 23.3 | 26.6 | 33.5 | 39.0 | 39.5 | 35.1 | 37.0 | 34.1 | 34.3 | 33.0 | 29.6 | 23.8 | 26.4 | 29.7 | 25.7 | 28.0 | 30.8 | 31.8 | 24.7 | 25.7 | 25.0 | 25.0 | 23.6 | 25.9 |
| Millendon (Swan Valley) | 33.2 | 35.9 | 41.4 | 38.9 | 40.4 | 41.3 | 28.1 | 26.8 | 31.8 | 36.2 | 38.0 | 39.1 | 40.9 | 41.9 | 42.2 | 39.8 | 37.0 | 36.0 | 24.9 | 27.5 | 35.7 | 30.3 | 33.8 | 36.2 | 37.9 | 31.1 | 30.1 | 30.4 | 27.3 | 27.1 | 31.7 |
| Pearce RAAF | 33.7 | 36.8 | 42.2 | 40.3 | 41.5 | 41.9 | 28.9 | 28.1 | 32.4 | 37.2 | 39.0 | 39.7 | 40.9 | 42.5 | 43.9 | 40.7 | 38.2 | 37.2 | 26.1 | 28.6 | 36.3 | 31.1 | 35.5 | 36.5 | 39.4 | 32.3 | 31.0 | 30.8 | 28.4 | 27.6 | 32.9 |
| Perth Airport | 33.1 | 36.1 | 40.9 | 38.0 | 40.7 | 40.9 | 27.2 | 26.0 | 31.4 | 37.0 | 38.0 | 39.2 | 40.6 | 40.9 | 41.6 | 39.3 | 35.6 | 35.0 | 24.7 | 27.2 | 34.9 | 29.3 | 32.3 | 34.2 | 36.7 | 29.4 | 29.1 | 28.7 | 26.9 | 26.2 | 30.8 |
| Perth Metro | 32.9 | 35.6 | 41.6 | 37.6 | 39.2 | 38.9 | 26.5 | 25.1 | 29.9 | 36.3 | 37.6 | 39.0 | 40.1 | 41.0 | 40.9 | 38.5 | 34.3 | 25.1 | 25.8 | 34.5 | 28.4 | 31.0 | 32.5 | 35.7 | 28.5 | 27.3 | 27.4 | 25.8 | 24.9 | 29.6 | |
| Rottnest Island | 25.8 | 31.1 | 37.2 | 26.0 | 30.0 | 35.4 | 24.9 | 22.9 | 23.9 | 26.2 | 30.5 | 35.6 | 37.9 | 33.3 | 32.0 | 28.9 | 27.2 | 30.8 | 24.2 | 24.5 | 28.3 | 24.6 | 25.7 | 25.5 | 28.3 | 25.4 | 25.6 | 24.6 | 25.6 | 23.4 | 24.6 |
| Swanbourne | 30.0 | 35.0 | 38.8 | 32.9 | 35.3 | 36.5 | 25.2 | 23.6 | 25.3 | 30.2 | 38.3 | 38.9 | 39.3 | 37.6 | 36.8 | 31.7 | 28.3 | 29.5 | 24.7 | 25.2 | 32.2 | 25.9 | 27.3 | 26.9 | 31.1 | 26.0 | 26.0 | 25.0 | 25.9 | 23.9 | 25.6 |
|
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 December 2019 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 9.6 | 15.2 | 19.2 | 22.3 | 18.7 | 20.2 | 16.0 | 11.9 | 12.2 | 14.4 | 14.5 | 16.1 | 20.3 | 21.2 | 21.1 | 21.9 | 21.1 | 19.3 | 16.9 | 13.7 | 14.1 | 16.1 | 16.1 | 16.4 | 17.8 | 17.6 | 15.3 | 12.7 | 14.8 | 11.7 | 12.9 |
| Garden Island HSF | 13.8 | 20.2 | 20.1 | 22.5 | 21.3 | 23.6 | 18.0 | 17.0 | 16.4 | 18.2 | 19.5 | 21.1 | 23.5 | 18.9 | 22.2 | 23.0 | 18.2 | 21.8 | 20.4 | 18.7 | 17.8 | 20.4 | 20.4 | 20.0 | 21.8 | 21.0 | 19.4 | 17.5 | 19.6 | 17.3 | 17.5 |
| Gosnells City | 15.1 | 19.5 | 24.0 | 20.6 | 25.0 | 19.0 | 15.4 | 15.0 | 16.8 | 21.0 | 21.0 | 21.2 | 23.2 | 20.0 | 17.1 | 16.6 | 15.9 | 18.7 | 18.5 | 20.1 | 14.0 | 17.8 | 15.6 | 15.3 | |||||||
| Jandakot Aero | 13.1 | 19.4 | 20.1 | 18.5 | 18.3 | 25.0 | 17.0 | 14.5 | 11.3 | 12.7 | 18.7 | 20.2 | 22.7 | 23.6 | 22.9 | 22.9 | 17.6 | 20.9 | 19.4 | 16.8 | 14.4 | 17.0 | 15.4 | 18.0 | 21.5 | 18.9 | 17.8 | 11.3 | 13.4 | 14.1 | 12.7 |
| Karnet | 10.2 | 15.6 | 20.1 | 20.9 | 22.0 | 15.4 | 11.4 | 12.2 | 13.8 | 15.4 | 16.5 | 21.7 | 20.2 | 18.2 | 19.2 | 16.6 | 15.6 | 16.7 | 18.8 | 15.5 | 11.9 | 13.9 | 12.3 | 12.7 | |||||||
| Mandurah | 13.3 | 19.6 | 22.2 | 23.0 | 21.7 | 25.6 | 19.6 | 17.0 | 15.5 | 18.0 | 19.0 | 20.6 | 24.8 | 25.1 | 24.8 | 23.8 | 22.1 | 22.8 | 20.6 | 18.5 | 17.6 | 19.8 | 19.9 | 18.6 | 22.1 | 21.6 | 19.1 | 16.4 | 18.2 | 16.6 | 16.1 |
| Millendon (Swan Valley) | 13.2 | 19.4 | 19.9 | 16.9 | 19.9 | 26.1 | 16.8 | 12.1 | 11.1 | 11.9 | 19.1 | 20.2 | 22.5 | 21.7 | 20.4 | 18.4 | 16.9 | 18.7 | 16.8 | 13.3 | 13.4 | 16.8 | 15.3 | 16.4 | 20.4 | 17.1 | 18.2 | 11.4 | 15.0 | 12.6 | 11.5 |
| Pearce RAAF | 13.9 | 20.4 | 20.4 | 17.3 | 20.8 | 27.1 | 17.1 | 12.4 | 10.6 | 12.1 | 19.8 | 21.5 | 24.5 | 24.1 | 18.5 | 16.9 | 15.7 | 17.2 | 17.3 | 14.4 | 14.6 | 14.6 | 12.9 | 15.2 | 19.2 | 16.9 | 17.5 | 11.1 | 14.3 | 14.9 | 12.2 |
| Perth Airport | 13.2 | 19.1 | 20.0 | 17.3 | 20.1 | 24.2 | 17.7 | 13.4 | 12.2 | 13.3 | 18.4 | 19.9 | 24.0 | 23.7 | 22.9 | 21.3 | 17.6 | 20.0 | 18.4 | 15.8 | 14.3 | 17.2 | 15.5 | 17.8 | 21.8 | 18.4 | 18.6 | 12.1 | 14.8 | 13.9 | 12.7 |
| Perth Metro | 13.6 | 19.3 | 20.6 | 19.4 | 19.5 | 24.6 | 18.4 | 16.2 | 13.0 | 13.8 | 18.5 | 20.0 | 20.7 | 21.1 | 21.8 | 21.6 | 19.8 | 20.3 | 18.9 | 17.4 | 15.6 | 18.3 | 16.4 | 19.0 | 21.5 | 18.9 | 18.6 | 16.1 | 16.7 | 15.8 | 12.9 |
| Rottnest Island | 14.9 | 19.1 | 21.3 | 20.9 | 21.3 | 22.6 | 18.5 | 17.0 | 17.1 | 18.8 | 19.7 | 21.7 | 22.4 | 23.4 | 22.7 | 21.5 | 20.8 | 21.7 | 19.5 | 17.8 | 18.5 | 19.4 | 20.6 | 19.5 | 21.7 | 20.5 | 19.6 | 18.2 | 18.6 | 17.6 | 17.7 |
| Swanbourne | 14.1 | 19.8 | 22.6 | 21.8 | 21.9 | 25.6 | 18.2 | 16.1 | 14.7 | 16.7 | 20.0 | 21.1 | 25.3 | 22.6 | 23.2 | 22.8 | 20.4 | 21.5 | 20.1 | 17.9 | 16.5 | 19.0 | 18.3 | 18.9 | 22.1 | 19.8 | 18.5 | 16.2 | 18.7 | 16.1 | 14.0 |
|
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 December 2019 | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | - | - | - | - | - | - | - | 1.4 | - | - | - | - | - | - | - | - | - | - | - | 3.1 | - | - | - | - | - | - | - | - | - | - | - | |
| Araluen | - | - | - | - | - | - | 0.8 | - | - | - | - | - | - | - | - | - | - | - | 5.6 | |||||||||||||
| Bickley | - | - | - | - | - | - | - | 0.8 | - | - | - | 0.2 | - | - | - | - | - | - | - | 7.0 | - | - | - | - | - | - | - | - | - | - | - | |
| Bungendore | - | - | - | - | - | - | - | 3.2 | 0.2 | - | - | - | - | - | - | - | - | - | - | 6.8 | - | - | - | - | - | - | - | - | - | 0.2 | - | |
| Chidlow | - | - | - | - | - | - | - | - | 0.6 | - | - | - | - | - | - | - | - | - | - | 1.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Garden Island HSF | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | 0.2 | 0.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Gidgegannup | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4.2 | - | - | - | - | - | - | - | - | - | - | - | |
| Gosnells City | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Huntly | - | - | - | - | - | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 9.8 | - | - | - | - | - | - | - | - | - | - | ||
| Jandakot Aero | - | - | - | - | - | - | - | 0.6 | - | - | - | - | - | - | - | - | 0.2 | - | 3.0 | - | - | - | - | - | - | - | - | - | - | - | ||
| Jarrahdale | - | - | - | - | - | - | - | 3.6 | - | - | - | - | - | - | - | - | - | - | - | 7.2 | - | - | - | - | - | - | - | - | - | 0.2 | - | |
| Karnet | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | → | → | → | 7.6 | - | - | - | - | - | - | 0.2 | - | |||
| Karragullen North | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 7.6 | - | - | - | - | - | - | - | → | → | 0.4 | ||
| Maida Vale | - | - | - | - | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | 3.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Mandurah | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Millendon (Swan Valley) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.8 | - | - | - | - | - | - | - | - | - | - | - | ||
| Mount Solus | - | - | - | - | - | - | - | 1.8 | - | - | - | - | - | - | - | - | - | - | - | 4.0 | 0.2 | - | - | - | - | - | - | - | - | - | - | |
| Muchea | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | - | 1.2 | - | - | - | - | - | - | - | - | - | - | - | |
| Mundaring | - | - | - | - | - | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 5.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Pearce RAAF | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.8 | - | - | - | - | - | - | - | - | - | - | - | ||
| Perth Airport | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | - | 1.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Perth Metro | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | 1.8 | - | - | - | - | - | - | - | - | - | 0.2 | - | ||
| Pinjarra Refinery | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.2 | 0.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Pinjarra South | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Roleystone | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | 7.8 | ||||||||||||
| Rottnest Island | - | - | - | - | - | - | - | 0.8 | - | - | - | - | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | |
| Serpentine | - | - | - | - | - | - | - | 1.8 | - | - | - | - | - | - | - | - | - | - | - | 3.2 | - | - | - | - | - | - | - | - | - | - | - | |
| Subiaco Treatment Plant | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | 1.6 | - | - | - | - | - | - | - | - | - | - | - | |
| Swanbourne | - | - | - | - | - | - | - | 1.0 | - | - | - | - | - | - | - | - | - | - | - | 1.6 | - | - | - | - | - | - | - | - | - | 0.2 | - | |
| Tamala Park (Mindarie) | - | - | - | - | - | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 1.2 | - | - | - | - | - | - | - | - | - | - | - | |
| Werribee | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.6 | - | - | - | - | - | - | - | - | - | - | - | |
| Whiteman Park | - | - | - | - | - | - | → | 1.6 | - | - | - | - | - | - | - | - | - | - | - | 2.4 | - | - | - | - | - | - | - | - | - | - | - | |
|
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 10 am on Wednesday 8 January 2020. 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
