Average annual temperature is 15.0 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 1.9 °C
Number of sunny days: 180 days
Number of rainy days: 185 days
Look at detailed online map of Williamstown
* Weather data for Williamstown 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) | 37.7 | 37.0 | 30.7 | 25.1 | 20.4 | 21.3 | 17.5 | 22.6 | 27.7 | 28.8 | 37.0 | 34.9 |
| Average daytime temperature (°C) | 28.4 | 27.1 | 23.3 | 19.3 | 15.0 | 13.7 | 13.2 | 14.9 | 19.1 | 19.0 | 23.3 | 23.9 |
| Average temperature (°C) | 21.5 | 20.9 | 17.6 | 14.9 | 11.3 | 10.7 | 9.4 | 10.9 | 14.1 | 14.0 | 16.7 | 18.1 |
| Average night temperature (°C) | 15.8 | 15.7 | 13.1 | 11.5 | 8.4 | 8.5 | 6.5 | 7.7 | 9.5 | 9.9 | 11.5 | 13.6 |
| Absolute minimum temperature (°C) | 10.6 | 9.0 | 9.6 | 7.0 | 3.8 | 4.3 | 1.9 | 3.8 | 3.3 | 3.7 | 8.1 | 9.1 |
| 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 | 13.3 | 12.3 | 11.2 | 10.3 | 9.9 | 10.1 | 10.9 | 11.9 | 13.0 | 13.9 | 14.4 |
| 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) | 11.9 | 11.2 | 9.8 | 8.4 | 6.3 | 6.0 | 7.4 | 8.0 | 10.4 | 10.6 | 11.9 | 10.5 |
| Precipitation (mm) | 25 | 27 | 39 | 70 | 105 | 182 | 78 | 62 | 38 | 27 | 31 | 59 |
| Sunny days | 24 | 20 | 16 | 13 | 11 | 2 | 10 | 9 | 20 | 17 | 23 | 15 |
| Rainy days | 7 | 8 | 15 | 17 | 20 | 28 | 21 | 22 | 10 | 14 | 7 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Williamstown during the most sunny months:
The largest precipitation sum in Williamstown is at