Monday 1 June 2026 - Monthly Climate Summary for Greater Perth - Product code IDCKGC11L0
Greater Perth in May 2026
Rainfall
- Rainfall totals for May were below average at all sites across Greater Perth.
- May rainfall totals ranged from around 10% to around 60% of average across Greater Perth.
Temperature
- Mean maximum temperatures for May at most sites across Greater Perth were below average.
- May mean maximum temperatures for Greater Perth ranged from 0.4 °C below average at Garden Island HSF and Swanbourne to 1.2 °C above average at Perth Airport.
- Mean minimum temperatures for May at all sites across Greater Perth were below average.
- May mean minimum temperatures for Greater Perth ranged from 1.7 °C below average at Pearce RAAF abd Perth Metro to 0.5 °C below average at Bickley and Rottnest Island.
Perth Metro
- Total rainfall for Perth Metro was 53.2 mm, which is 62% of the long-term average of 85.5 mm.
- The mean daily maximum temperature for Perth Metro was 22.3 °C, which is 0.1 °C below the long-term average of 22.4 °C.
- The warmest day was 28.3 °C on the 12th, and the coolest day was on the 1st when the temperature reached 17.8 °C.
- The mean daily minimum temperature for Perth Metro was 8.9 °C, which is 1.7 °C below the long-term average of 10.6 °C.
- The coldest morning was 2.5 °C on the 24th, and the warmest morning was on the 28th when the minimum temperature was 14.5 °C.
Extremes Records Summaries Daily observations Important notes the top
| Extremes in May 2026 | |
|---|---|
| Hottest day |
28.9 °C at Perth Airport on the 12th |
| Warmest days on average |
23.1 °C at Perth Airport |
| Coolest days on average |
19.4 °C at Bickley |
| Coldest day |
14.8 °C at Bickley on the 1st |
| Coldest night |
0.5 °C at Jandakot Aero on the 24th |
| Coolest nights on average |
7.5 °C at Jandakot Aero |
| Warmest nights on average |
12.8 °C at Mandurah |
| Warmest night |
17.3 °C at Rottnest Island on the 13th 17.3 °C at Mandurah on the 28th |
| Warmest on average overall |
16.8 °C at Garden Island HSF |
| Coolest on average overall |
14.0 °C at Karnet |
| Wettest overall |
74.2 mm at Pinjarra South |
| Wettest day |
50.8 mm at Pinjarra South on the 28th |
| Strongest wind gust |
78.0 km/h at Mandurah on the 30th |
Extremes Records Summaries Daily observations Important notes the top
Extremes Records Summaries Daily observations Important notes the top
| Summary statistics for May 2026 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
| Mean for May 2026 |
Diff from average |
Highest for May 2026 |
Mean for May 2026 |
Diff from average |
Lowest for May 2026 |
Total for May 2026 |
Average for May |
Rank of May 2026 |
Fraction of May average |
|||
| Bickley | 19.4 | 0.0 | 25.3 | 12th | 9.7 | -0.5 | 5.1 | 24th | 45.0 | 128.1 | v low | 35% |
| Garden Island HSF | 21.2 | -0.4 | 26.2 | 11th | 12.5 | -1.4 | 7.7 | 23rd | 40.4 | 73.6 | low | 55% |
| Jandakot Aero | 22.2 | 0.0 | 27.8 | 12th | 7.5 | -2.0 | 0.5 | 24th | 22.0 | 102.9 | lowest | 21% |
| Karnet | 19.7 | +0.4 | 25.2 | 12th | 8.4 | -0.7 | 2.2 | 23rd | 28.5 | 136.1 | v low | 21% |
| Mandurah | 20.6 | -0.6 | 23.2 | 8th | 12.8 | -0.7 | 8.2 | 24th | 36.6 | 81.1 | v low | 45% |
| Millendon (Swan Valley) | 22.8 | 28.6 | 12th | 8.1 | 1.1 | 24th | 25.2 | |||||
| Pearce RAAF | 23.0 | +0.8 | 28.7 | 12th | 9.0 | -1.7 | 2.0 | 23rd | 21.8 | 81.7 | v low | 27% |
| Perth Airport | 23.1 | +1.2 | 28.9 | 12th | 9.0 | -1.4 | 2.8 | 23rd | 31.8 | 95.9 | low | 33% |
| Perth Metro | 22.3 | -0.1 | 28.3 | 12th | 8.9 | -1.7 | 2.5 | 24th | 53.2 | 85.5 | low | 62% |
| Rottnest Island | 21.1 | -0.1 | 25.4 | 12th | 14.8 | -0.5 | 12.4 | 2nd | 6.8 | 70.0 | lowest | 10% |
| Swanbourne | 21.9 | -0.4 | 26.9 | 11th | 11.6 | -1.0 | 6.1 | 24th | 35.4 | 86.5 | low | 41% |
Extremes Records Summaries Daily observations Important notes the top
| Daily maximum temperatures for May 2026 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 14.8 | 15.4 | 17.4 | 20.0 | 21.3 | 19.5 | 20.1 | 20.4 | 20.5 | 21.6 | 23.8 | 25.3 | 22.1 | 16.1 | 17.1 | 17.5 | 19.3 | 17.9 | 23.7 | 23.3 | 21.4 | 16.5 | 16.4 | 18.5 | 21.5 | 21.7 | 19.3 | 17.9 | 15.6 | 17.0 | |
| Garden Island HSF | 16.3 | 17.1 | 19.7 | 20.3 | 19.8 | 23.2 | 22.8 | 23.5 | 23.6 | 23.5 | 26.2 | 25.8 | 23.9 | 19.4 | 18.0 | 19.7 | 20.2 | 20.1 | 22.6 | 23.7 | 21.4 | 18.0 | 17.4 | 20.5 | 23.2 | 23.7 | 21.8 | 20.2 | 19.3 | 21.0 | |
| Jandakot Aero | 17.7 | 18.2 | 20.7 | 22.0 | 23.1 | 22.7 | 23.1 | 23.6 | 23.6 | 24.5 | 27.0 | 27.8 | 25.1 | 19.8 | 19.2 | 20.0 | 21.6 | 20.5 | 26.2 | 25.7 | 23.7 | 19.6 | 18.1 | 20.9 | 24.5 | 25.2 | 21.9 | 20.9 | 19.5 | 20.7 | |
| Karnet | 15.0 | 15.9 | 19.0 | 20.6 | 21.5 | 19.8 | 20.4 | 20.8 | 21.0 | 21.9 | 24.2 | 25.2 | 22.5 | 16.0 | 16.7 | 17.1 | 18.3 | 17.5 | 24.0 | 23.9 | 21.1 | 16.8 | 16.0 | 17.4 | 22.0 | 21.5 | 19.9 | 18.0 | 16.8 | ||
| Mandurah | 17.1 | 17.6 | 20.5 | 20.9 | 20.5 | 23.1 | 22.7 | 23.2 | 23.0 | 22.2 | 22.9 | 22.7 | 22.1 | 19.1 | 18.2 | 18.2 | 19.7 | 20.4 | 22.1 | 21.7 | 22.1 | 18.4 | 16.9 | 19.7 | 21.7 | 21.7 | 21.0 | 20.4 | 18.5 | 20.7 | |
| Millendon (Swan Valley) | 17.8 | 18.8 | 20.6 | 22.7 | 24.3 | 23.3 | 23.4 | 23.9 | 24.4 | 25.0 | 27.3 | 28.6 | 24.5 | 19.4 | 21.1 | 20.7 | 22.7 | 21.9 | 27.0 | 26.9 | 24.8 | 19.8 | 19.1 | 21.5 | 24.8 | 25.5 | 22.7 | 21.6 | 18.8 | 20.0 | |
| Pearce RAAF | 18.5 | 18.9 | 20.3 | 22.9 | 24.5 | 23.3 | 23.6 | 24.1 | 24.6 | 25.5 | 28.0 | 28.7 | 24.3 | 19.5 | 20.5 | 20.9 | 22.4 | 22.8 | 27.2 | 28.2 | 24.9 | 20.4 | 19.1 | 21.8 | 25.2 | 26.0 | 22.8 | 22.1 | 18.7 | 19.7 | |
| Perth Airport | 18.9 | 19.2 | 20.8 | 23.6 | 24.6 | 23.7 | 23.7 | 24.0 | 24.1 | 25.3 | 27.9 | 28.9 | 25.1 | 21.0 | 21.0 | 21.5 | 22.6 | 22.0 | 27.3 | 26.7 | 25.1 | 20.6 | 19.5 | 21.5 | 25.1 | 25.2 | 22.3 | 21.5 | 18.8 | 20.1 | |
| Perth Metro | 17.8 | 18.1 | 20.6 | 22.8 | 23.7 | 23.2 | 23.6 | 23.7 | 24.0 | 25.1 | 27.4 | 28.3 | 24.2 | 19.8 | 19.4 | 19.7 | 21.6 | 20.9 | 27.3 | 26.0 | 22.9 | 19.2 | 18.5 | 20.9 | 24.1 | 24.8 | 21.8 | 20.8 | 18.3 | 20.7 | |
| Rottnest Island | 16.4 | 16.9 | 18.6 | 19.4 | 19.5 | 21.7 | 21.3 | 22.2 | 22.4 | 23.3 | 25.3 | 25.4 | 23.4 | 20.2 | |||||||||||||||||
| Swanbourne | 17.3 | 18.1 | 20.0 | 21.9 | 22.4 | 23.2 | 23.0 | 24.1 | 24.3 | 24.5 | 26.9 | 26.1 | 23.3 | 19.6 | 19.2 | 19.1 | 20.9 | 20.6 | 25.1 | 24.7 | 22.8 | 18.7 | 17.7 | 21.1 | 24.8 | 24.9 | 22.1 | 20.8 | 17.9 | 20.8 | |
|
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 May 2026 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 9.0 | 6.1 | 8.3 | 7.9 | 8.0 | 8.6 | 7.9 | 9.9 | 9.1 | 8.4 | 9.8 | 12.4 | 14.5 | 14.3 | 9.9 | 9.4 | 8.9 | 11.9 | 9.3 | 12.7 | 14.6 | 8.0 | 5.1 | 5.1 | 6.9 | 8.2 | 12.3 | 11.7 | 11.1 | 9.0 | |
| Garden Island HSF | 12.7 | 10.1 | 11.0 | 11.2 | 12.1 | 13.0 | 12.4 | 14.3 | 14.4 | 14.7 | 11.2 | 14.4 | 13.2 | 15.5 | 14.2 | 12.7 | 8.4 | 13.1 | 11.6 | 13.5 | 10.7 | 12.5 | 7.7 | 8.5 | 10.3 | 11.8 | 15.2 | 17.2 | 14.2 | 11.3 | |
| Jandakot Aero | 11.8 | 3.3 | 4.6 | 6.8 | 8.7 | 9.6 | 8.5 | 8.9 | 12.6 | 6.0 | 7.6 | 4.9 | 5.8 | 11.3 | 7.0 | 8.7 | 4.9 | 8.6 | 7.1 | 5.5 | 7.5 | 3.6 | 2.3 | 0.5 | 2.0 | 9.5 | 11.9 | 14.5 | 9.6 | 7.2 | |
| Karnet | 9.8 | 5.0 | 5.9 | 7.0 | 8.0 | 9.2 | 10.5 | 11.0 | 8.4 | 9.8 | 11.4 | 7.6 | 9.0 | 12.0 | 7.7 | 8.4 | 6.2 | 9.9 | 8.5 | 8.6 | 8.5 | 6.5 | 2.2 | 3.5 | 6.1 | 10.5 | 10.2 | 12.9 | 8.8 | ||
| Mandurah | 12.8 | 9.1 | 10.3 | 11.3 | 11.3 | 13.2 | 11.6 | 13.7 | 13.3 | 13.9 | 14.6 | 14.2 | 13.4 | 15.1 | 13.7 | 12.2 | 12.0 | 15.0 | 11.9 | 13.3 | 12.6 | 10.5 | 8.7 | 8.2 | 11.3 | 15.0 | 16.6 | 17.3 | 13.6 | 12.2 | |
| Millendon (Swan Valley) | 10.8 | 2.8 | 3.9 | 5.6 | 8.7 | 9.7 | 10.5 | 14.3 | 14.2 | 8.1 | 9.5 | 5.3 | 6.6 | 9.3 | 6.6 | 8.0 | 4.6 | 6.7 | 8.8 | 6.9 | 8.1 | 3.8 | 3.5 | 1.1 | 6.3 | 11.2 | 11.2 | 13.8 | 9.7 | 8.1 | |
| Pearce RAAF | 11.5 | 2.5 | 3.7 | 5.3 | 11.0 | 9.5 | 12.8 | 13.8 | 13.6 | 12.4 | 13.5 | 7.3 | 6.7 | 9.1 | 7.3 | 4.9 | 4.6 | 6.3 | 8.5 | 9.0 | 9.2 | 4.0 | 2.0 | 2.6 | 10.5 | 12.6 | 12.3 | 13.6 | 11.3 | 11.8 | |
| Perth Airport | 11.4 | 3.1 | 4.7 | 7.2 | 10.0 | 9.5 | 10.7 | 11.3 | 13.8 | 11.4 | 11.3 | 10.0 | 7.4 | 10.6 | 7.2 | 7.6 | 6.4 | 7.9 | 8.5 | 7.0 | 8.2 | 4.6 | 2.8 | 3.5 | 6.9 | 13.2 | 12.6 | 13.8 | 11.2 | 9.5 | |
| Perth Metro | 11.7 | 5.0 | 5.9 | 7.2 | 9.7 | 10.2 | 9.7 | 11.7 | 11.5 | 6.8 | 8.0 | 6.8 | 8.9 | 12.7 | 9.1 | 10.7 | 7.3 | 9.7 | 9.1 | 8.2 | 9.1 | 6.7 | 4.0 | 2.5 | 4.5 | 9.6 | 12.7 | 14.5 | 11.5 | 9.1 | |
| Rottnest Island | 12.5 | 12.4 | 13.7 | 14.1 | 13.8 | 13.9 | 14.0 | 15.5 | 15.0 | 15.6 | 17.1 | 17.1 | 17.3 | 16.6 | |||||||||||||||||
| Swanbourne | 11.5 | 7.7 | 9.3 | 9.6 | 10.1 | 11.7 | 10.6 | 13.4 | 13.1 | 11.9 | 13.4 | 12.4 | 13.3 | 14.2 | 13.3 | 11.8 | 9.6 | 12.2 | 11.4 | 13.8 | 12.7 | 9.9 | 7.5 | 6.1 | 8.4 | 12.7 | 16.5 | 16.2 | 13.0 | 10.4 | |
|
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 May 2026 | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 1.1 | 0.1 | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | → | 3.4 | - | 22.3 | 0.8 | 0.5 | 8.1 | |
| Araluen | 25.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.5 | - | - | - | - | - | - | - | - | - | - | - | - | 19.8 | ||||
| Bickley | 0.8 | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | 0.8 | - | - | 0.2 | 0.2 | - | - | - | - | - | - | - | - | 25.6 | 0.6 | 0.2 | 16.4 | |
| Bungendore | 0.4 | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | 1.4 | - | - | - | - | - | - | - | - | - | - | - | - | 9.2 | 0.8 | - | 12.0 | |
| Chidlow | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.6 | - | - | - | - | - | - | - | - | - | - | - | - | 10.4 | 2.4 | |||
| Garden Island HSF | 9.0 | - | - | - | - | - | - | - | - | - | - | - | - | 2.8 | 1.4 | 1.0 | 1.0 | 1.8 | 0.2 | - | - | - | - | - | - | - | - | 13.6 | 0.8 | 0.2 | 8.6 | |
| Gidgegannup | 0.8 | - | - | - | - | - | - | - | - | - | - | - | - | - | 3.0 | 0.2 | - | 0.2 | - | - | - | - | - | - | - | - | - | 17.8 | 1.2 | 0.2 | 15.0 | |
| Huntly | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.8 | 8.2 | 0.2 | - | 0.6 | - | - | - | - | - | - | - | - | - | 50.6 | 0.3 | 0.2 | ||
| Jandakot Aero | 1.8 | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | 1.6 | - | - | - | - | - | - | - | - | - | - | - | - | 9.8 | 0.6 | - | 8.0 | |
| Jarrahdale | 1.0 | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 2.6 | - | - | - | - | - | - | - | - | - | - | - | - | 19.0 | - | - | 15.2 | |
| Karnet | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.0 | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | 23.5 | 2.0 | - | ||
| Karragullen North | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.6 | - | - | - | - | - | - | - | 0.2 | - | - | - | - | 25.0 | - | 0.6 | 34.2 | |
| Maida Vale | 1.2 | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 2.2 | - | - | - | - | - | - | - | - | - | - | - | - | 22.6 | 0.8 | 0.2 | 17.0 | |
| Mandurah | 0.4 | - | - | - | - | - | - | - | - | - | - | - | - | 0.6 | 3.2 | 0.4 | - | 1.4 | - | - | - | - | - | - | - | - | - | 19.8 | - | - | 10.8 | |
| Millendon (Swan Valley) | 1.4 | - | - | - | - | - | - | - | - | - | - | - | - | - | 2.8 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 13.6 | 1.8 | 0.2 | 5.2 | |
| Mount Solus | 0.6 | - | - | 0.2 | - | 0.2 | - | - | - | - | - | - | - | 0.4 | 2.2 | - | 0.2 | 0.2 | 0.2 | 0.2 | - | - | - | - | - | - | - | 13.0 | - | 0.2 | 25.6 | |
| Muchea | 0.2 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 3.0 | 4.2 | - | - | - | - | - | - | - | - | - | - | - | 12.0 | - | 0.6 | 9.2 | |
| Mundaring | 1.8 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.2 | - | - | - | - | - | - | - | - | - | - | - | - | 19.0 | ||||
| Pearce RAAF | 1.0 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | - | - | - | - | - | - | - | - | - | - | - | - | 12.4 | 0.6 | - | 5.6 | |
| Perth Airport | 0.6 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1.4 | 0.4 | - | - | - | - | - | - | - | - | - | - | - | 17.4 | 0.6 | 0.2 | 11.2 | |
| Perth Metro | 3.6 | - | - | - | - | - | - | - | - | - | - | - | - | - | 8.2 | - | - | - | - | - | - | - | - | - | - | - | - | 19.2 | 2.4 | 0.2 | 19.6 | |
| Pinjarra Refinery | 0.2 | - | - | - | - | - | - | - | - | - | - | - | - | 1.4 | 5.0 | - | - | 1.2 | - | - | - | - | - | - | - | - | - | 50.3 | ||||
| Pinjarra South | 0.4 | - | - | - | - | - | - | - | - | - | - | - | - | 0.2 | 5.0 | 0.2 | - | 1.8 | - | - | - | - | - | - | - | - | - | 50.8 | 0.2 | 0.4 | 15.2 | |
| Roleystone | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 1.6 | - | - | - | - | - | - | - | - | - | - | - | - | 19.0 | ||||
| Rottnest Island | 2.6 | - | - | - | - | - | - | - | - | - | - | - | - | 2.0 | 2.2 | |||||||||||||||||
| Serpentine | - | - | - | - | - | - | - | - | - | 2.4 | - | - | 0.2 | - | ||||||||||||||||||
| Swanbourne | 1.2 | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | 8.4 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 11.4 | 2.8 | 0.8 | 10.2 | |
| Tamala Park (Mindarie) | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.4 | - | 2.4 | - | - | - | - | - | - | - | - | - | - | - | 8.0 | ||||
| Wanneroo | 3.2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 11.4 | 4.2 | |||
| Werribee | 0.2 | - | - | - | 0.2 | - | - | 0.6 | - | - | - | - | - | - | 0.2 | 0.2 | - | - | - | - | - | - | - | - | - | - | - | 14.6 | 2.4 | 0.4 | 9.6 | |
|
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 Records Summaries Daily observations Important notes the top
Notes
The Monthly climate summary, usually published in the first week of the following 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.
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 represent a socio-economic definition of each capital city. This means the greater capital city boundary includes people who regularly socialise, shop or work within the capital city, but live in the small towns and rural areas surrounding the capital city. It does not define the built up edge of the capital city.
This statement has been prepared based on information available on Sunday 31 May 2026. 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, excluding the current year. The length of record can
vary widely from site to site. Averages are not shown for sites with fewer 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.
Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.
Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence
