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Swanbourne Long-term Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Max (°C) |
29.8 | 30.5 | 28.8 | 25.2 | 22.1 | 19.4 | 18.4 | 18.9 | 20.0 | 22.3 | 25.4 | 28.1 | 24.0 |
| Mean Min (°C) |
18.3 | 18.8 | 17.6 | 15.2 | 12.5 | 10.6 | 9.9 | 10.1 | 11.1 | 12.5 | 14.8 | 16.8 | 14.0 |
| Mean Rain (mm) |
16.8 | 12.1 | 21.3 | 38.7 | 88.6 | 128.5 | 151.4 | 117.1 | 78.5 | 42.2 | 23.2 | 9.9 | 730.4 |
| Median Rain (mm) |
1.2 | 1.7 | 12.2 | 29.2 | 81.2 | 126.2 | 144.4 | 122.6 | 80.2 | 32.4 | 21.7 | 5.1 | 742.4 |
| Mean Rain Days |
2.4 | 2.1 | 4.0 | 7.4 | 11.8 | 16.7 | 18.6 | 17.2 | 15.0 | 8.8 | 5.3 | 3.3 | 112.9 |
Swanbourne Daily Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max (°C) |
44.3 | 43.0 | 42.8 | 37.3 | 31.5 | 26.2 | 25.9 | 30.2 | 34.7 | 37.1 | 41.1 | 43.7 | 44.3 |
| Low Max (°C) |
19.5 | 17.1 | 18.4 | 16.6 | 13.2 | 12.5 | 12.2 | 11.6 | 13.2 | 15.8 | 16.0 | 19.3 | 11.6 |
| High Min (°C) |
28.4 | 28.7 | 28.8 | 23.9 | 20.2 | 17.1 | 16.0 | 17.3 | 19.0 | 21.1 | 25.6 | 27.2 | 28.8 |
| Low Min (°C) |
4.7 | 7.3 | 7.5 | 3.0 | 4.8 | 2.9 | 2.4 | 3.1 | 3.1 | 2.0 | 4.3 | 5.7 | 2.0 |
| High Rain (mm) |
138.6 | 97.4 | 51.8 | 64.0 | 62.2 | 76.0 | 75.0 | 82.0 | 45.0 | 76.0 | 35.2 | 30.2 | 138.6 |
Swanbourne Monthly Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Mn. Max (°C) |
33.1 | 34.0 | 31.2 | 27.9 | 24.0 | 21.2 | 19.5 | 21.5 | 22.3 | 25.0 | 29.0 | 30.5 | 25.4 |
| Low Mn. Max (°C) |
27.6 | 27.8 | 26.1 | 23.0 | 20.5 | 17.1 | 16.7 | 17.4 | 17.7 | 19.8 | 22.7 | 22.8 | 22.8 |
| High Mn. Min (°C) |
20.4 | 21.0 | 19.1 | 17.7 | 15.1 | 12.8 | 11.8 | 12.2 | 13.1 | 14.6 | 17.6 | 19.5 | 14.9 |
| Low Mn. Min (°C) |
16.4 | 17.0 | 16.1 | 12.9 | 10.8 | 9.0 | 7.6 | 8.2 | 9.0 | 10.2 | 12.6 | 14.5 | 12.9 |
| High Rain (mm) |
145.8 | 141.8 | 82.4 | 146.4 | 211.6 | 259.8 | 285.4 | 209.4 | 160.8 | 129.4 | 77.0 | 67.0 | 951.8 |
| Low Rain (mm) |
0.0 | 0.0 | 0.0 | 0.4 | 15.2 | 23.2 | 42.0 | 31.0 | 18.0 | 5.0 | 1.0 | 0.0 | 497.8 |
Swanbourne Annual Temperatures & Rainfall
Swanbourne Average Number of Days With Temperatures
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≥ 40°C |
0.7 | 0.7 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.4 | 2.2 |
| ≥ 35°C |
5.0 | 5.6 | 2.7 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 1.5 | 3.9 | 19.1 |
| ≥ 30°C |
13.5 | 14.0 | 11.2 | 3.1 | 0.2 | 0.0 | 0.0 | 0.0 | 0.2 | 1.9 | 4.9 | 9.5 | 58.5 |
| ≤ 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 | 0.0 |
| ≤ 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 |
Swanbourne 'per Week' Values (14th/86th Percentiles)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max |
35.0 | 35.9 | 33.8 | 29.1 | 25.0 | 21.4 | 20.2 | 20.6 | 21.9 | 25.4 | 30.0 | 34.2 | 30.3 |
| Low Max |
24.8 | 24.9 | 24.2 | 21.6 | 19.1 | 17.1 | 16.3 | 16.6 | 17.4 | 18.8 | 21.1 | 22.8 | 18.2 |
| High Min |
21.0 | 21.6 | 20.8 | 18.2 | 16.0 | 13.8 | 13.0 | 13.0 | 13.9 | 15.1 | 17.5 | 19.6 | 18.5 |
| Low Min |
15.1 | 15.1 | 13.9 | 11.8 | 9.3 | 7.5 | 6.2 | 6.8 | 7.9 | 9.0 | 11.5 | 13.2 | 9.0 |
Swanbourne Data Availability
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Years of Minima |
31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 30.0 |
| Earliest Entry |
1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1993 | 1993 | 1993 | 1993 | 1993 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2024 |
| Years of Maxima |
31 | 31 | 31 | 30 | 29 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 30.0 |
| Earliest Entry |
1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1993 | 1993 | 1993 | 1993 | 1993 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2024 |
| Years of Rainfall |
31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 30.0 |
| Earliest Entry |
1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1994 | 1993 | 1993 | 1993 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2023 | 2024 |
Station Details
SWANBOURNE
Perth, Western Australia
Perth, Western Australia
31.9560°S 115.7619°E
41m AMSL
Commenced 1985
Commenced 1985
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Rain arrives in Perth after driest seven months on record
20:16 AEST Perth just registered its driest October-to-April period on record despite a welcome burst of rain on Tuesday. Summer and the surrounding months are typically the driest time of year in Perth as cold fronts shift further south and rain-shielding high pressure systems become the dominant synoptic feature over southwestern Australia.
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