Williamstown Sunshine Hours by Month

In climate discussions, the hours of sunlight reveal much about a location. This page shows the total number of hours of direct sunlight per month and the average hours per day in Williamstown, South Australia, Australia. The figures are based on a 30-year period (1990–2020) to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in Williamstown varies. It peaks at 326 hours in January and drops to 140 hours in June. The total annual amount of sun is 2768 hours.

Daily hours of sunshine

In Williamstown, summer days are longer and more sunny, with daily sunshine hours peaking at 10.9 hours in January. As the darker season arrives, the brightness of the sun becomes less. June sees a soft sun for only 4.7 hours per day.

Average percent of sunshine

On average the sun shines 76% of the time during the day in July, the highest percentage of any month. October has the lowest percentage at 52%.

Williamstown enjoys an average of 2768 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

Boston, USA, enjoys 2629 hours of sunshine annually, with distinct seasons and many bright, sunny days.

Adelaide, Australia, enjoys 2770 hours of sunshine annually, with long, sunny summers.

September, Williamstown’s wettest month, receives 24 mm (0.9 in) of rainfall and has a maximum daytime temperature of 18°C (64°F). During the driest month March you can expect a temperature of 26°C (79°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Williamstown Precipitation page.