Average annual temperature is 15.0 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -4.7 °C
Number of sunny days: 221 days
Number of rainy days: 143 days
Number of snow days: 1 day
Look at detailed online map of Illawarra
* Weather data for Illawarra South Africa is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.8 | 30.0 | 28.2 | 25.6 | 23.7 | 20.3 | 21.4 | 22.7 | 30.5 | 32.0 | 35.9 | 33.7 |
| Average daytime temperature (°C) | 26.8 | 24.7 | 24.9 | 21.3 | 17.2 | 14.3 | 14.8 | 18.7 | 22.0 | 24.9 | 28.0 | 26.8 |
| Average temperature (°C) | 20.0 | 18.6 | 17.8 | 14.4 | 10.9 | 8.1 | 8.0 | 11.0 | 14.2 | 16.6 | 20.3 | 19.7 |
| Average night temperature (°C) | 13.9 | 13.1 | 11.9 | 7.9 | 5.5 | 3.0 | 1.9 | 4.0 | 6.7 | 8.9 | 12.7 | 13.3 |
| Absolute minimum temperature (°C) | 6.5 | 8.7 | 5.0 | 0.9 | -1.0 | -0.7 | -4.7 | -3.0 | -1.2 | 3.5 | 5.5 | 9.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 |
| Daylight mean duration (h) | 13.9 | 13.2 | 12.3 | 11.3 | 10.6 | 10.2 | 10.4 | 11.0 | 11.9 | 12.8 | 13.6 | 14.1 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 12.1 | 10.4 | 10.7 | 10.0 | 8.7 | 8.7 | 9.0 | 10.0 | 10.1 | 11.2 | 11.8 | 11.5 |
| Precipitation (mm) | 124 | 101 | 79 | 9 | 62 | 12 | 9 | 5 | 34 | 28 | 27 | 153 |
| Sunny days | 11 | 7 | 12 | 22 | 19 | 25 | 23 | 26 | 26 | 22 | 18 | 10 |
| Rainy days | 20 | 21 | 19 | 8 | 12 | 5 | 7 | 5 | 4 | 9 | 12 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Illawarra is at