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Rottnest Island Long-term Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Max (°C) |
26.6 | 27.3 | 26.1 | 23.8 | 21.2 | 18.8 | 17.9 | 18.0 | 19.0 | 20.6 | 23.1 | 25.2 | 22.2 |
| Mean Min (°C) |
19.1 | 19.4 | 18.7 | 17.2 | 15.2 | 13.4 | 12.5 | 12.4 | 13.0 | 14.1 | 15.9 | 17.7 | 15.7 |
| Mean Rain (mm) |
14.5 | 10.9 | 18.9 | 33.4 | 68.5 | 110.2 | 115.2 | 86.2 | 52.1 | 27.2 | 19.6 | 10.0 | 561.9 |
| Median Rain (mm) |
1.4 | 2.5 | 11.2 | 23.6 | 58.0 | 103.7 | 118.6 | 89.3 | 54.6 | 21.5 | 18.0 | 2.6 | 516.6 |
| Mean Rain Days |
2.2 | 1.9 | 4.0 | 7.7 | 11.2 | 15.5 | 19.0 | 17.3 | 13.4 | 8.6 | 5.5 | 3.3 | 109.5 |
Rottnest Island Daily Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max (°C) |
41.9 | 41.5 | 40.8 | 38.0 | 29.2 | 24.9 | 26.5 | 28.3 | 32.8 | 36.4 | 38.4 | 42.5 | 42.5 |
| Low Max (°C) |
19.4 | 18.0 | 17.2 | 16.3 | 14.0 | 13.0 | 12.6 | 12.4 | 13.3 | 14.1 | 15.0 | 18.4 | 12.4 |
| High Min (°C) |
26.4 | 25.7 | 26.0 | 23.6 | 21.1 | 18.1 | 17.8 | 18.0 | 18.8 | 20.5 | 24.9 | 27.0 | 27.0 |
| Low Min (°C) |
11.3 | 10.0 | 2.3 | 4.0 | 1.8 | 3.9 | 0.0 | 6.1 | 6.7 | 6.7 | 6.6 | 10.8 | 0.0 |
| High Rain (mm) |
142.2 | 93.8 | 38.0 | 49.8 | 61.6 | 154.7 | 66.8 | 34.6 | 42.0 | 58.0 | 52.0 | 36.2 | 154.7 |
Rottnest Island Monthly Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Mn. Max (°C) |
29.7 | 30.1 | 28.3 | 26.0 | 23.7 | 20.4 | 18.9 | 19.8 | 20.3 | 22.7 | 26.3 | 28.1 | 23.2 |
| Low Mn. Max (°C) |
24.6 | 25.3 | 23.8 | 21.4 | 19.9 | 17.0 | 16.8 | 16.7 | 17.0 | 18.5 | 20.4 | 21.5 | 21.2 |
| High Mn. Min (°C) |
20.8 | 21.7 | 20.8 | 19.3 | 17.3 | 15.0 | 13.5 | 14.2 | 14.3 | 16.0 | 17.9 | 19.8 | 16.6 |
| Low Mn. Min (°C) |
17.7 | 17.3 | 14.6 | 15.4 | 13.9 | 12.0 | 11.1 | 11.4 | 11.1 | 12.3 | 14.2 | 15.6 | 14.8 |
| High Rain (mm) |
143.2 | 104.0 | 61.4 | 152.2 | 179.6 | 282.6 | 213.8 | 126.2 | 107.0 | 98.8 | 54.4 | 70.0 | 792.6 |
| Low Rain (mm) |
0.0 | 0.0 | 0.0 | 0.0 | 12.4 | 11.8 | 54.8 | 24.8 | 15.2 | 3.4 | 3.0 | 0.0 | 332.8 |
Rottnest Island Annual Temperatures & Rainfall
Rottnest Island Average Number of Days With Temperatures
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≥ 40°C |
0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.3 |
| ≥ 35°C |
1.5 | 1.6 | 1.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.3 | 1.2 | 5.9 |
| ≥ 30°C |
5.4 | 6.7 | 4.6 | 1.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.5 | 1.9 | 4.5 | 25.2 |
| ≤ 2°C |
0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| ≤ 0°C |
0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Rottnest Island 'per Week' Values (14th/86th Percentiles)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max |
30.3 | 32.1 | 30.0 | 27.0 | 23.5 | 20.8 | 19.6 | 19.8 | 20.8 | 22.7 | 25.9 | 29.4 | 26.4 |
| Low Max |
22.9 | 23.2 | 22.3 | 20.6 | 18.5 | 16.3 | 15.7 | 15.7 | 16.5 | 17.7 | 19.8 | 21.4 | 17.5 |
| High Min |
21.1 | 21.8 | 21.1 | 19.6 | 17.6 | 15.4 | 14.3 | 14.1 | 14.8 | 16.0 | 17.9 | 20.0 | 19.3 |
| Low Min |
16.6 | 17.0 | 15.9 | 14.8 | 13.0 | 11.0 | 10.2 | 10.3 | 10.9 | 11.6 | 13.3 | 15.0 | 11.9 |
Rottnest Island Data Availability
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Years of Minima |
34 | 36 | 36 | 36 | 34 | 36 | 36 | 34 | 36 | 34 | 35 | 34 | 34.0 |
| Earliest Entry |
1984 | 1984 | 1984 | 1984 | 1984 | 1984 | 1983 | 1986 | 1986 | 1985 | 1983 | 1990 | 1983 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
| Years of Maxima |
34 | 36 | 36 | 36 | 35 | 36 | 36 | 34 | 36 | 35 | 35 | 33 | 34.0 |
| Earliest Entry |
1984 | 1984 | 1984 | 1984 | 1984 | 1984 | 1983 | 1986 | 1986 | 1985 | 1983 | 1990 | 1983 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
| Years of Rainfall |
31 | 31 | 31 | 31 | 30 | 33 | 32 | 33 | 32 | 31 | 31 | 29 | 29.0 |
| Earliest Entry |
1984 | 1984 | 1984 | 1984 | 1990 | 1984 | 1983 | 1985 | 1986 | 1985 | 1983 | 1995 | 1983 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
Station Details
ROTTNEST ISLAND
Lower West, Western Australia
Lower West, Western Australia
32.0069°S 115.5022°E
44m AMSL
Commenced 1983
Commenced 1983
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