Monday, 1 February 2021 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in January 2021: dry and very warm
January 2021 was dry and very warm across Greater Perth. Both mean maximum and minimum temperatures were above average. Monthly rainfall at most sites recorded less than 5 mm.
Dry with across Greater Perth
- January 2021 was dry across Greater Perth with monthly rainfall totals of less than 5 mm at most sites, and only Araluen and Mount Solus at the Perth hills recorded more than 10 mm.
- Isolated thunderstorms produced light rainfall on the 19th and 20th at most sites, though no rain fell in the rain gauge at Perth Airport and Jandakot Airport.
- Perth Metro recorded a mere 0.2 mm total in January, which was its lowest January rainfall since 2014.
Above average temperatures
- Mean maximum temperatures were about 0.5 °C above average in the Perth hills, and 1–2 °C above average for coastal plain sites, reaching 3 °C at Garden Island.
- Mean minimum temperatures were above average at all sites, with Perth Airport and Pearce RAAF were 1.6 °C above average.
- Perth Metro recorded a mean maximum temperature of 32.9 °C, which was its fourth-warmest January on record, and warmest since 2015.
- The hottest day was on the 8th with temperatures in the high 30s to low 40s, and the coolest day was on the 27th with temperatures in the mid-20s.
- Perth Metro recorded a maximum temperature of 42.2 °C on the 8th, which was its highest January temperature for 5 years since 44.4 °C was recorded on 6 January 2015.
Perth Metro
- Total rainfall for Perth Metro was 0.2 mm, which is 1% of the long-term average of 18.5 mm
- The mean daily maximum temperature for Perth Metro was 32.9 °C, which is 1.7 °C above the long-term average of 31.2 °C
- The warmest day was 42.2 °C on the 8th, and the coolest day was on the 27th when the temperature reached 25.9 °C
- The mean daily minimum temperature for Perth Metro was 18.7 °C, which is 0.6 °C above the long-term average of 18.1 °C
- The coldest morning was 14.3 °C on the 27th, and the warmest morning was on the 9th when the minimum temperature was 23.7 °C
Further information
- Media
- media@ (03) 9669 4057
Extremes Maps Records Summaries Daily observations Important notes the top
| Extremes in January 2021 | |
|---|---|
| Hottest day | 42.3 °C at Pearce RAAF on the 8th |
| Warmest days on average | 34.2 °C at Pearce RAAF |
| Coolest days on average | 29.3 °C at Rottnest Island |
| Coldest day | 23.0 °C at Garden Island HSF on the 27th |
| Coldest night | 10.3 °C at Karnet on the 28th |
| Coolest nights on average | 15.7 °C at Karnet |
| Warmest nights on average | 19.8 °C at Rottnest Island |
| Warmest night | 26.7 °C at Mandurah on the 9th |
| Warmest on average overall | 26.4 °C at Pearce RAAF |
| Coolest on average overall | 23.2 °C at Karnet |
| Wettest overall | 15.0 mm at Araluen |
| Wettest day | 15.0 mm at Araluen on the 20th |
| Strongest wind gust | 93 km/h at Perth Airport on the 2nd |
Extremes Maps Records Summaries Daily observations Important notes the top
| Summary statistics for January 2021 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for January 2021 |
Diff from average |
Highest for January 2021 |
Mean for January 2021 |
Diff from average |
Lowest for January 2021 |
Total for January 2021 |
Average for January |
Rank of January 2021 |
Fraction of January average |
|||
| Bickley | 31.0 | +0.5 | 38.9 | 8th | 15.8 | +0.4 | 11.4 | 28th | 2.2 | 20.2 | average | 11% |
| Garden Island HSF | 30.4 | +3.2 | 39.5 | 8th | 19.2 | +0.3 | 16.0 | 28th | 0.8 | 14.1 | average | 6% |
| Jandakot Aero | 33.1 | +1.8 | 41.3 | 8th | 18.2 | +1.4 | 12.0 | 27th | 0 | 15.8 | lowest | 0% |
| Karnet | 30.6 | 0.0 | 38.4 | 8th | 15.7 | +0.4 | 10.3 | 28th | 2.0 | 18.7 | average | 11% |
| Mandurah | 31.9 | +2.6 | 38.6 | 8th | 19.5 | +0.6 | 15.5 | 28th | 1.6 | 16.7 | average | 10% |
| Millendon (Swan Valley) | 33.7 | 42.1 | 8th | 18.5 | 12.1 | 27th | 5.4 | |||||
| Pearce RAAF | 34.2 | +0.7 | 42.3 | 8th | 18.6 | +1.6 | 11.5 | 27th | 0.2 | 10.3 | average | 2% |
| Perth Airport | 33.6 | +1.8 | 41.5 | 8th | 18.6 | +1.6 | 11.7 | 27th | 0 | 10.8 | lowest | 0% |
| Perth Metro | 32.9 | +1.7 | 42.2 | 8th | 18.7 | +0.6 | 14.3 | 27th | 0.2 | 18.5 | low | 1% |
| Rottnest Island | 29.3 | +2.9 | 39.7 | 8th | 19.8 | +0.7 | 16.4 | 28th | 0 | 15.5 | lowest | 0% |
| Swanbourne | 31.3 | +1.6 | 40.1 | 8th | 19.4 | +1.2 | 15.2 | 28th | 0.4 | 18.8 | low | 2% |
Extremes Maps Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for January 2021 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 31.9 | 29.0 | 29.0 | 29.5 | 30.6 | 32.8 | 35.5 | 38.9 | 37.0 | 26.4 | 30.0 | 31.4 | 30.6 | 30.5 | 29.8 | 30.7 | 32.8 | 31.9 | 35.5 | 29.9 | 34.5 | 35.3 | 27.8 | 25.1 | 25.2 | 25.1 | 25.2 | 30.7 | 31.5 | 32.2 | 35.5 |
| Garden Island HSF | 30.0 | 32.6 | 32.0 | 32.7 | 34.2 | 35.6 | 36.2 | 39.5 | 29.4 | 23.9 | 25.6 | 23.9 | 29.7 | 34.1 | 33.3 | 33.2 | 36.9 | 35.2 | 29.4 | 27.4 | 27.8 | 28.8 | 24.2 | 26.3 | 25.0 | 23.8 | 23.0 | 28.2 | 34.4 | 34.7 | 30.7 |
| Gosnells City | 35.1 | 32.5 | 33.8 | 41.6 | 37.6 | 28.2 | 32.7 | 32.7 | 34.0 | 33.5 | 36.0 | 34.2 | 36.0 | 37.1 | 35.8 | 28.9 | 28.1 | 28.6 | 35.0 | 35.5 | |||||||||||
| Jandakot Aero | 35.2 | 32.4 | 32.2 | 32.1 | 34.0 | 36.0 | 37.8 | 41.3 | 36.1 | 27.2 | 31.0 | 30.6 | 33.9 | 33.9 | 33.5 | 34.1 | 36.3 | 35.7 | 36.8 | 31.1 | 35.1 | 33.6 | 27.6 | 27.4 | 27.2 | 26.4 | 26.4 | 33.2 | 35.0 | 35.6 | 38.2 |
| Karnet | 30.7 | 28.7 | 27.6 | 29.2 | 30.7 | 33.3 | 36.0 | 38.4 | 36.4 | 26.7 | 29.8 | 31.2 | 29.1 | 31.2 | 29.4 | 30.6 | 32.7 | 33.0 | 35.2 | 30.6 | 33.4 | 34.9 | 27.2 | 24.5 | 24.9 | 25.5 | 25.0 | 29.7 | 30.9 | 32.2 | |
| Mandurah | 34.2 | 32.8 | 31.1 | 33.0 | 34.5 | 35.3 | 35.7 | 38.6 | 34.9 | 26.3 | 31.1 | 28.4 | 32.9 | 33.6 | 33.5 | 33.9 | 36.3 | 34.3 | 31.8 | 29.5 | 32.2 | 30.6 | 26.4 | 26.2 | 26.1 | 25.8 | 25.1 | 30.1 | 34.3 | 35.1 | 34.7 |
| Millendon (Swan Valley) | 35.1 | 32.0 | 32.1 | 32.3 | 34.0 | 36.1 | 38.3 | 42.1 | 39.1 | 28.0 | 32.6 | 32.1 | 33.6 | 32.9 | 32.7 | 34.0 | 36.2 | 34.0 | 38.3 | 31.6 | 37.3 | 38.1 | 29.1 | 28.4 | 28.7 | 27.7 | 27.4 | 33.3 | 34.2 | 35.3 | 38.2 |
| Pearce RAAF | 35.5 | 33.2 | 32.3 | 32.8 | 34.5 | 36.2 | 39.0 | 42.3 | 39.8 | 29.2 | 33.2 | 33.4 | 34.1 | 33.8 | 33.2 | 34.0 | 36.4 | 33.3 | 39.0 | 32.0 | 37.7 | 38.6 | 29.9 | 29.6 | 28.9 | 27.9 | 28.1 | 33.5 | 35.1 | 36.0 | 38.7 |
| Perth Airport | 35.6 | 32.4 | 31.9 | 32.4 | 33.9 | 36.4 | 38.6 | 41.5 | 38.1 | 28.0 | 32.5 | 32.4 | 33.9 | 33.6 | 32.8 | 34.1 | 36.1 | 35.2 | 37.8 | 31.2 | 36.4 | 36.8 | 28.2 | 28.1 | 27.9 | 26.4 | 27.0 | 33.3 | 34.5 | 35.6 | 38.4 |
| Perth Metro | 33.9 | 32.9 | 32.3 | 32.5 | 34.3 | 35.9 | 38.5 | 42.2 | 35.9 | 27.0 | 30.9 | 29.4 | 33.1 | 33.6 | 33.1 | 34.2 | 36.7 | 34.5 | 36.6 | 30.1 | 34.8 | 36.5 | 27.3 | 27.1 | 27.4 | 26.3 | 25.9 | 30.9 | 34.5 | 35.2 | 37.3 |
| Rottnest Island | 26.7 | 31.2 | 30.5 | 31.1 | 32.8 | 33.1 | 35.3 | 39.7 | 29.9 | 25.4 | 24.9 | 24.5 | 26.7 | 31.0 | 32.1 | 33.3 | 35.0 | 31.2 | 31.9 | 27.0 | 26.5 | 27.7 | 26.0 | 25.0 | 25.2 | 24.8 | 24.2 | 25.4 | 28.2 | 30.7 | 31.1 |
| Swanbourne | 30.5 | 32.5 | 32.1 | 32.5 | 34.0 | 36.3 | 37.3 | 40.1 | 31.6 | 25.7 | 27.7 | 25.8 | 31.5 | 34.0 | 33.3 | 34.1 | 36.3 | 34.8 | 30.0 | 27.8 | 30.3 | 31.0 | 26.0 | 26.3 | 25.9 | 24.9 | 25.0 | 28.4 | 35.0 | 36.0 | 34.6 |
|
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 January 2021 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 16.2 | 15.7 | 13.7 | 12.9 | 13.9 | 14.6 | 18.3 | 20.4 | 24.7 | 18.1 | 12.9 | 14.0 | 13.3 | 12.7 | 13.2 | 13.6 | 14.6 | 19.2 | 21.2 | 20.1 | 18.9 | 16.0 | 19.5 | 14.5 | 14.8 | 13.5 | 12.6 | 11.4 | 14.8 | 14.9 | 16.1 |
| Garden Island HSF | 19.9 | 19.5 | 18.0 | 17.3 | 18.2 | 20.2 | 20.3 | 17.7 | 22.5 | 21.1 | 17.3 | 18.1 | 16.7 | 16.6 | 17.2 | 18.4 | 20.1 | 24.3 | 23.6 | 22.4 | 22.0 | 20.7 | 19.1 | 18.0 | 18.7 | 17.3 | 17.2 | 16.0 | 18.7 | 19.2 | 19.7 |
| Gosnells City | 20.4 | 18.5 | 17.6 | 19.2 | 25.9 | 21.1 | 17.0 | 18.1 | 16.5 | 17.0 | 18.2 | 19.4 | 22.0 | 20.5 | 20.7 | 16.3 | 17.4 | 17.4 | 14.0 | 17.5 | |||||||||||
| Jandakot Aero | 19.2 | 19.1 | 17.4 | 16.5 | 17.3 | 18.6 | 21.1 | 18.4 | 23.3 | 21.2 | 15.4 | 16.3 | 16.4 | 16.2 | 16.6 | 17.7 | 18.7 | 24.3 | 24.7 | 22.4 | 21.8 | 19.6 | 16.5 | 14.1 | 16.7 | 13.5 | 12.0 | 14.5 | 18.3 | 18.5 | 19.3 |
| Karnet | 16.2 | 16.0 | 14.2 | 13.1 | 14.8 | 15.4 | 19.7 | 20.6 | 23.7 | 17.6 | 12.6 | 13.7 | 12.7 | 12.0 | 13.1 | 15.8 | 20.2 | 21.4 | 19.5 | 17.8 | 15.7 | 16.4 | 13.1 | 14.4 | 13.7 | 11.5 | 10.3 | 14.6 | 15.0 | 15.8 | |
| Mandurah | 19.7 | 19.8 | 18.0 | 17.3 | 17.8 | 18.9 | 23.7 | 24.9 | 26.7 | 21.1 | 16.9 | 18.0 | 16.9 | 16.2 | 16.6 | 17.4 | 19.0 | 23.2 | 24.0 | 22.0 | 21.5 | 19.8 | 21.9 | 18.3 | 18.2 | 17.6 | 16.7 | 15.5 | 18.6 | 18.8 | 20.0 |
| Millendon (Swan Valley) | 19.0 | 19.4 | 17.6 | 17.1 | 18.0 | 19.4 | 23.4 | 18.8 | 21.9 | 21.7 | 16.4 | 16.0 | 16.9 | 16.5 | 16.7 | 18.2 | 19.2 | 25.5 | 24.5 | 21.4 | 20.0 | 20.1 | 16.6 | 14.6 | 16.9 | 14.4 | 12.1 | 15.0 | 18.4 | 18.6 | 20.4 |
| Pearce RAAF | 18.0 | 19.6 | 18.0 | 17.9 | 18.4 | 20.7 | 24.4 | 19.4 | 22.6 | 21.3 | 16.5 | 16.4 | 17.0 | 16.3 | 16.8 | 19.0 | 20.6 | 26.0 | 23.4 | 20.8 | 19.3 | 20.5 | 15.5 | 14.9 | 16.5 | 13.4 | 11.5 | 14.3 | 18.7 | 19.1 | 20.7 |
| Perth Airport | 20.0 | 19.3 | 17.3 | 16.7 | 17.5 | 19.0 | 22.0 | 20.1 | 23.8 | 21.6 | 15.7 | 17.3 | 16.8 | 16.3 | 16.7 | 17.4 | 18.7 | 23.4 | 24.2 | 22.7 | 22.8 | 20.0 | 16.7 | 14.1 | 17.8 | 15.2 | 11.7 | 15.3 | 18.5 | 18.6 | 20.1 |
| Perth Metro | 20.3 | 19.4 | 17.7 | 16.7 | 17.7 | 18.7 | 20.1 | 18.7 | 23.7 | 21.4 | 16.4 | 17.6 | 16.8 | 16.7 | 16.9 | 17.9 | 19.1 | 22.4 | 22.6 | 22.3 | 22.7 | 20.0 | 18.1 | 15.9 | 18.3 | 14.6 | 14.3 | 15.3 | 18.5 | 19.1 | 20.1 |
| Rottnest Island | 20.3 | 19.4 | 18.2 | 17.8 | 18.6 | 20.3 | 21.9 | 23.5 | 23.4 | 20.3 | 17.4 | 19.1 | 16.9 | 17.2 | 17.2 | 18.8 | 20.3 | 24.4 | 22.8 | 20.9 | 22.0 | 21.4 | 20.2 | 19.4 | 19.1 | 17.9 | 18.0 | 16.4 | 19.3 | 19.4 | 21.3 |
| Swanbourne | 19.9 | 19.5 | 18.0 | 17.3 | 18.1 | 19.7 | 23.0 | 23.1 | 24.4 | 20.7 | 16.3 | 18.1 | 16.9 | 16.8 | 17.2 | 18.4 | 19.9 | 24.6 | 23.3 | 21.8 | 22.2 | 20.7 | 18.9 | 17.0 | 18.2 | 16.7 | 16.2 | 15.2 | 18.7 | 19.2 | 20.4 |
|
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 January 2021 | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | - | - | - | - | 0.1 | - | 0.2 | - | - | - | - | |
| Araluen | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 15.0 | - | - | - | - | - | - | - | - | ||||
| Bickley | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.2 | - | - | - | - | - | - | - | - | - | - | - | |
| Bungendore | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5.8 | 0.2 | - | - | - | - | - | - | - | - | - | - | |
| Chidlow | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.5 | ||||||||||||
| Garden Island HSF | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | - | 0.4 | 0.2 | - | - | - | ||
| Gidgegannup | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Gosnells City | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | ||||
| Huntly | - | - | - | - | - | - | - | - | - | 0.1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Jandakot Aero | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Jarrahdale | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 6.4 | 0.2 | - | - | - | - | - | - | 0.2 | - | - | - | |
| Karnet | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | |
| Karragullen North | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.2 | ||||||||||||
| Mandurah | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 0.2 | - | - | - | - | - | 1.0 | - | - | - | - | ||
| Millendon (Swan Valley) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5.4 | - | - | - | - | - | - | - | - | - | - | - | |
| Mount Solus | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 12.2 | 0.2 | - | - | - | - | - | - | - | - | - | - | |
| Muchea | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.8 | 3.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Mundaring | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 8.2 | ||||||||||||
| Pearce RAAF | 0.2 | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||
| Perth Airport | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Perth Metro | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Pinjarra South | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5.2 | - | - | - | - | - | - | 0.6 | - | - | - | - | |
| Rottnest Island | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Serpentine | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.8 | - | - | - | - | - | - | - | - | - | - | - | |
| Subiaco Treatment Plant | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||
| Swanbourne | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Tamala Park (Mindarie) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | ||||
| Wanneroo | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.1 | |||||||||||||
| Werribee | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
|
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 February 2021. 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
