Climate
Port Stephens Council covers an area of 979 square kilometres (378 sq mi), stretching approximately 57 kilometres (35 mi) from east to west and approximately 30 km (19 mi) from north to south, and experiences various climatic conditions throughout the LGA. These are monitored by five weather stations, four of which are located at the approximate cardinal points of the area, operated by the Bureau of Meteorology. The fifth station is located on RAAF Base Williamtown. The following tables indicate average climatic data throughout the area.
- Eastern
| Climate data for Nelson Head, Nelson Bay | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Mean maximum (°C) | 27.3 | 27.1 | 25.9 | 23.7 | 20.8 | 18.4 | 17.5 | 18.9 | 21.4 | 23.3 | 24.8 | 26.3 | 23.0 |
| Mean minimum (°C) | 18.2 | 18.4 | 17.0 | 14.6 | 11.7 | 9.4 | 8.4 | 9.3 | 11.2 | 13.5 | 15.2 | 17.1 | 13.7 |
| Highest (°C) | 36.5 | 41.5 | 36.0 | 30.5 | 26.7 | 24.0 | 24.4 | 27.4 | 34.2 | 33.9 | 40.6 | 39.3 | 41.5 |
| Lowest (°C) | 11.0 | 14.5 | 11.5 | 9.0 | 6.1 | 4.4 | 2.2 | 1.1 | 5.0 | 8.5 | 6.7 | 9.0 | 1.1 |
| Mean rainfall (mm) | 100.8 | 111.3 | 119.2 | 126.7 | 152.2 | 153.1 | 141.1 | 105.5 | 88.8 | 78.3 | 78.8 | 95.0 | 1348.9 |
- North
| Climate data for Wallaroo State Forest, Twelve Mile Creek | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Mean maximum (°C) | 28.3 | 27.8 | 26.5 | 23.0 | 19.8 | 17.1 | 16.4 | 18.0 | 21.2 | 23.7 | 26.2 | 28.0 | 23.0 |
| Mean minimum (°C) | 16.3 | 16.4 | 14.8 | 11.0 | 7.4 | 5.8 | 3.6 | 4.8 | 6.7 | 10.2 | 12.4 | 14.6 | 10.3 |
| Highest (°C) | (no data) | ||||||||||||
| Lowest (°C) | (no data) | ||||||||||||
| Mean rainfall (mm) | 124.8 | 121.7 | 142.6 | 100.0 | 99.7 | 118.7 | 63.4 | 68.1 | 58.2 | 79.7 | 83.0 | 90.6 | 1151.8 |
- South-central
| Climate data for RAAF Base Williamtown, Williamtown | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Mean maximum (°C) | 27.9 | 27.5 | 26.2 | 23.7 | 20.2 | 17.6 | 17.0 | 18.6 | 21.2 | 23.6 | 25.4 | 27.2 | 23.0 |
| Mean minimum (°C) | 18.0 | 18.1 | 16.3 | 13.2 | 10.1 | 7.8 | 6.4 | 6.9 | 9.0 | 12.0 | 14.2 | 16.5 | 12.4 |
| Highest (°C) | 44.4 | 42.8 | 40.7 | 37.0 | 29.6 | 26.6 | 27.8 | 30.1 | 36.0 | 39.4 | 43.2 | 42.8 | 44.4 |
| Lowest (°C) | 9.4 | 9.6 | 8.6 | 2.1 | −0.6 | 0.0 | −3.9 | −1.9 | 0.4 | 3.0 | 5.1 | 7.9 | −3.9 |
| Mean rainfall (mm) | 99.9 | 121.4 | 121.7 | 104.2 | 115.0 | 121.0 | 71.6 | 78.1 | 59.4 | 74.5 | 80.9 | 80.0 | 1125.6 |
- Western
| Climate data for Tocal Automatic Weather Station (AWS), Tocal | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Mean maximum (°C) | 29.6 | 28.8 | 26.9 | 24.3 | 20.7 | 17.7 | 17.3 | 19.3 | 22.2 | 24.9 | 26.6 | 29.1 | 24.0 |
| Mean minimum (°C) | 17.5 | 17.5 | 15.6 | 12.4 | 9.7 | 7.4 | 6.1 | 6.6 | 8.8 | 11.4 | 13.8 | 16.2 | 11.9 |
| Highest (°C) | 43.7 | 44.6 | 41.2 | 37.3 | 29.5 | 26.1 | 27.3 | 30.4 | 36.2 | 40.1 | 42.5 | 44.2 | 44.6 |
| Lowest (°C) | 8.6 | 9.4 | 8.0 | 1.3 | 0.5 | 0.2 | −4.7 | −1.5 | −0.6 | 3.4 | 5.3 | 6.2 | −4.7 |
| Mean rainfall (mm) | 108.5 | 116.3 | 118.1 | 76.4 | 76.8 | 71.1 | 39.3 | 37.9 | 47.8 | 67.3 | 81.5 | 78.2 | 925.2 |
- Southern
| Climate data for Nobbys Signal Station AWS, Newcastle | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Mean maximum (°C) | 25.5 | 25.4 | 24.7 | 22.8 | 20.0 | 17.5 | 16.7 | 18.0 | 20.2 | 22.1 | 23.5 | 24.9 | 21.8 |
| Mean minimum (°C) | 19.2 | 19.3 | 18.2 | 15.3 | 12.0 | 9.6 | 8.4 | 9.2 | 11.4 | 14.0 | 16.1 | 18.0 | 14.2 |
| Highest (°C) | 41.4 | 40.9 | 39.0 | 36.8 | 28.5 | 26.1 | 26.3 | 29.9 | 34.4 | 36.7 | 41.0 | 42.0 | 42.0 |
| Lowest (°C) | 12.0 | 10.3 | 11.1 | 7.4 | 4.7 | 3.0 | 1.8 | 3.3 | 5.0 | 6.5 | 7.2 | 11.0 | 1.8 |
| Mean rainfall (mm) | 89.5 | 108.0 | 120.8 | 116.6 | 118.0 | 117.5 | 95.0 | 75.1 | 73.0 | 73.2 | 70.5 | 81.8 | 1140.8 |
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