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Shannon Long-term Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Max (°C) |
26.5 | 26.8 | 24.7 | 21.3 | 18.3 | 15.7 | 14.9 | 15.4 | 16.6 | 18.7 | 22.0 | 24.7 | 20.4 |
| Mean Min (°C) |
12.7 | 13.5 | 12.7 | 10.8 | 9.0 | 7.6 | 6.7 | 6.9 | 7.4 | 8.4 | 10.1 | 11.4 | 9.7 |
| Mean Rain (mm) |
18.0 | 20.1 | 32.6 | 72.0 | 119.2 | 156.5 | 180.6 | 156.8 | 118.5 | 76.3 | 49.1 | 30.2 | 1028.4 |
| Median Rain (mm) |
10.8 | 10.8 | 19.4 | 43.4 | 116.4 | 150.6 | 143.6 | 150.9 | 132.8 | 63.2 | 45.4 | 15.5 | 994.4 |
| Mean Rain Days |
7.9 | 7.2 | 9.7 | 15.4 | 20.2 | 22.1 | 23.9 | 23.1 | 20.4 | 17.0 | 13.2 | 9.4 | 189.3 |
Shannon Daily Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max (°C) |
41.0 | 41.4 | 41.0 | 33.1 | 29.0 | 22.3 | 21.0 | 24.8 | 28.0 | 31.5 | 38.0 | 41.0 | 41.4 |
| Low Max (°C) |
15.7 | 16.3 | 11.0 | 10.9 | 9.6 | 8.8 | 9.5 | 8.0 | 10.0 | 11.0 | 13.0 | 15.0 | 8.0 |
| High Min (°C) |
21.0 | 24.0 | 23.0 | 19.0 | 19.0 | 14.0 | 13.9 | 13.8 | 15.5 | 16.5 | 20.0 | 21.0 | 24.0 |
| Low Min (°C) |
4.0 | 6.0 | 3.0 | 2.0 | 0.0 | -2.0 | -1.0 | 0.0 | 0.3 | 1.0 | 1.0 | 3.0 | -2.0 |
| High Rain (mm) |
27.0 | 55.4 | 35.0 | 62.0 | 80.0 | 52.2 | 47.0 | 64.4 | 38.4 | 50.0 | 39.0 | 42.6 | 80.0 |
Shannon Monthly Records
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Mn. Max (°C) |
28.0 | 29.0 | 26.9 | 24.6 | 20.6 | 16.9 | 16.0 | 17.5 | 18.4 | 22.1 | 24.8 | 29.4 | 21.1 |
| Low Mn. Max (°C) |
24.1 | 24.2 | 22.1 | 18.6 | 16.4 | 13.6 | 13.7 | 14.0 | 14.3 | 16.4 | 18.7 | 20.9 | 19.3 |
| High Mn. Min (°C) |
15.4 | 15.4 | 14.7 | 12.1 | 11.6 | 9.1 | 7.8 | 8.9 | 8.7 | 10.3 | 12.2 | 13.2 | 10.4 |
| Low Mn. Min (°C) |
11.4 | 11.9 | 10.9 | 8.6 | 7.4 | 5.0 | 5.1 | 5.3 | 5.7 | 6.8 | 8.4 | 9.5 | 9.1 |
| High Rain (mm) |
70.0 | 105.8 | 100.8 | 183.0 | 208.6 | 281.4 | 302.0 | 349.8 | 203.4 | 144.2 | 151.4 | 83.2 | 1357.4 |
| Low Rain (mm) |
3.2 | 2.8 | 1.0 | 6.4 | 39.8 | 40.6 | 68.6 | 31.4 | 2.4 | 30.0 | 12.4 | 3.6 | 520.6 |
Shannon Annual Temperatures & Rainfall
Shannon 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 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.4 |
| ≥ 35°C |
2.0 | 1.8 | 1.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 1.2 | 6.2 |
| ≥ 30°C |
7.8 | 8.0 | 4.4 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 2.4 | 5.2 | 28.7 |
| ≤ 2°C |
0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 1.0 | 1.9 | 0.9 | 0.8 | 0.2 | 0.1 | 0.0 | 5.4 |
| ≤ 0°C |
0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 |
Shannon 'per Week' Values (14th/86th Percentiles)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max |
32.0 | 33.0 | 30.9 | 26.0 | 21.3 | 18.0 | 17.0 | 18.0 | 19.0 | 22.0 | 27.0 | 30.6 | 27.0 |
| Low Max |
21.0 | 21.4 | 19.0 | 17.0 | 15.0 | 13.0 | 13.0 | 13.0 | 13.2 | 15.0 | 17.4 | 19.0 | 15.0 |
| High Min |
16.0 | 17.0 | 16.0 | 14.0 | 13.0 | 10.5 | 9.0 | 10.0 | 10.0 | 11.0 | 13.0 | 15.0 | 14.0 |
| Low Min |
9.0 | 9.3 | 9.0 | 7.0 | 6.0 | 4.0 | 3.0 | 4.0 | 4.0 | 5.0 | 6.0 | 8.0 | 5.0 |
Shannon Data Availability
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Years of Minima |
23 | 25 | 26 | 25 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 25 | 24.0 |
| Earliest Entry |
1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1996 | 1996 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
| Years of Maxima |
23 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 25 | 24.0 |
| Earliest Entry |
1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1996 | 1996 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
| Years of Rainfall |
23 | 25 | 26 | 25 | 25 | 25 | 26 | 24 | 26 | 25 | 25 | 25 | 24.0 |
| Earliest Entry |
1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1997 | 1996 | 1996 |
| Latest Entry |
2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2023 | 2024 |
Station Details
SHANNON
Southwest, Western Australia
Southwest, Western Australia
34.5683°S 116.3367°E
210m AMSL
Commenced 1996
Commenced 1996
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