Average annual temperature is 15.2 °C
Absolute maximum temperature: 30.0 °C
Absolute minimum temperature: 5.6 °C
Number of sunny days: 121 days
Number of rainy days: 244 days
Look at detailed online map of William Bay
* Weather data for William Bay Australia is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 28.3 | 30.0 | 29.1 | 25.7 | 22.3 | 18.0 | 18.7 | 22.0 | 27.3 | 28.9 | 26.0 | 26.5 |
| Average daytime temperature (°C) | 22.2 | 22.9 | 22.1 | 19.3 | 17.7 | 13.9 | 15.4 | 16.0 | 17.8 | 18.7 | 20.6 | 21.4 |
| Average temperature (°C) | 17.8 | 18.7 | 17.9 | 15.4 | 14.1 | 11.2 | 12.4 | 12.4 | 14.0 | 14.9 | 16.6 | 17.5 |
| Average night temperature (°C) | 14.5 | 15.1 | 14.9 | 12.5 | 11.0 | 8.6 | 9.6 | 9.3 | 10.8 | 11.9 | 13.8 | 14.3 |
| Absolute minimum temperature (°C) | 10.7 | 11.3 | 10.5 | 8.5 | 8.1 | 5.9 | 5.6 | 6.3 | 5.9 | 8.1 | 10.3 | 11.2 |
| 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 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 |
| Daylight mean duration (h) | 14.2 | 13.4 | 12.3 | 11.2 | 10.3 | 9.8 | 10.1 | 10.8 | 11.9 | 13.0 | 13.9 | 14.5 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 |
| Sunshine mean duration (h) | 10.8 | 10.8 | 9.1 | 8.3 | 7.0 | 6.7 | 7.7 | 7.0 | 8.2 | 9.0 | 9.9 | 10.7 |
| Precipitation (mm) | 21 | 17 | 57 | 84 | 42 | 126 | 67 | 100 | 81 | 32 | 43 | 22 |
| Sunny days | 14 | 14 | 11 | 7 | 10 | 4 | 11 | 9 | 8 | 10 | 8 | 15 |
| Rainy days | 17 | 14 | 20 | 23 | 21 | 26 | 20 | 22 | 22 | 21 | 22 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in William Bay is at