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 excellent 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.