December weather forecast and climate
Newcastle, Australia

What is the temperature in December in Newcastle?

The average high-temperature, in December, is 24.9°C (76.8°F), while the average low-temperature is 18°C (64.4°F).

How much does it rain in Newcastle in December?

In Newcastle, in December, during 10.6 rainfall days, typically, 81.1mm (3.2") of precipitation is accumulated.

What is the water temperature in December in Newcastle?

The average seawater temperature, in December, is 22.6°C (72.7°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.6°C (72.7°F) water may be enjoyable. The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).
Average temperature in December - Newcastle, Australia
  • Average high temperature in December: 24.9°C

The warmest month (with the highest average high temperature) is January (25.6°C).
The month with the lowest average high temperature is July (16.7°C).

  • Average low temperature in December: 18°C

The month with the highest average low temperature is February (19.3°C).
The coldest month (with the lowest average low temperature) is July (8.4°C).

Average humidity in December - Newcastle, Australia
  • Average humidity in December: 71%

The month with the highest relative humidity is February (74%).
The month with the lowest relative humidity is August (56%).

Average rainfall in December - Newcastle, Australia
  • Average rainfall in December: 81.1mm

The wettest month (with the highest rainfall) is March (119.7mm).
The driest month (with the lowest rainfall) is November (70.5mm).

Average rainfall days in December - Newcastle, Australia
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is September (10 days).

Average sea temperature in December - Newcastle, Australia
  • Average sea temperature in December: 22.6°C

The best month for swimming (with the highest average sea temperature) is February (24°C).
The coldest month (with the lowest average sea temperature) is August (18.9°C).

Average daylight in December - Newcastle, Australia
  • Average daylight in December: 14.3h

The month with the longest days is December (Average daylight: 14.3h).
The month with shortest days is June (Average daylight: 10h).

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