Williamstown Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Williamstown. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

On average, Williamstown receives a reasonable amount of rainfall, with an annual precipitation of 685 mm.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

The amount of precipitation varies moderately throughout the year. The wettest month, September, sees around 68 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, March, still receives a respectable 40 mm of rainfall.

September, the city’s wettest month, has a maximum daytime temperature of 17°C and receives 185 hours of sunshine. During the driest month March you can expect a temperature of 24°C. For more detailed insights into the city’s temperatures, visit our Williamstown Temperature page.

Annual Precipitation in Australia

The map below shows the annual precipitation across Australia. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Williamstown’s average annual precipitation is 685 mm. Let’s compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm, with rain and snow contributing to its humid climate.

Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

How is Precipitation Measured?

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Global Warming and Precipitation

Climate change is affecting precipitation patterns worldwide, including Williamstown:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

For more detailed information about Williamstown’s weather, including sunshine hours, humidity levels, and temperature data, visit our Williamstown Climate page.