Williamstown Weather in December

In Williamstown, December brings high daytime temperatures around 23°C (73°F), with nights cooling to 13°C (55°F). Expect quite a bit of rainfall this month.

Rainfall in Williamstown in December

Historically, the month has about 9 days of rain, averaging 62 mm (2.4 in) in total. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Williamstown in December

Williamstown in December has perfect weather. Days reach 23°C (73°F) and nights cool to 13°C (55°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Williamstown in December

The month enjoys around 265 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Williamstown in December

Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in December

The water temperature is 16°C (61°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.

If you favor pleasant temperatures and minimal rainfall, December is one of the best months to visit Williamstown.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Williamstown's climate page.

Williamstown Temperature in December

Min Temperature 13°C (55°F)  

Max Temperature 23°C (73°F)  

Water Temperature 16°C (61°F) *  

Chance of Rain 30%  

Precipitation 62 mm (2.4 in)  

Rainy days 9 days  

Humidity 45% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 265 hours *  

Percentage Sunshine 58% *  

* Data from: Melbourne, Australia (7 KM, 4 Miles).

What to Wear in Williamstown in December

Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 16°C (61°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Williamstown in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

10/10

Walking

10/10

Barbeque

8/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Williamstown's climate page.

More climate data for Williamstown

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Williamstown climate overview or explore weather in Australia.