Newcastle
Australia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Newcastle, Australia

The first month of the summer, December, is still a warm month in Newcastle, Australia, with average temperature ranging between min 18.7°C (65.7°F) and max 25.3°C (77.5°F).

Temperature

In Newcastle, Australia, the average high-temperature in December is practically the same as in November - a still warm 25.3°C (77.5°F). In Newcastle, in December, the average low-temperature is 18.7°C (65.7°F).

Humidity

In December, the average relative humidity is 74%.

Rainfall

In December, the rain falls for 14 days. Throughout December, 40mm (1.57") of precipitation is accumulated. Throughout the year, in Newcastle, there are 160.9 rainfall days, and 620mm (24.41") of precipitation is accumulated.

Sea temperature

In Newcastle, the average seawater temperature is 22.6°C (72.7°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22.6°C (72.7°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

December has the longest days of the year in Newcastle, with an average of 14.3h of daylight.

Sunshine

November and December, with an average of 9.8h of sunshine, are months with the most sunshine.

UV index

Months with the highest UV index in Newcastle are January, February, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in December in Newcastle?

In Newcastle, in December, the average high-temperature is 25.3°C (77.5°F), and the average low-temperature is 18.7°C (65.7°F).

What is the average humidity in December in Newcastle?

In December, the average relative humidity in Newcastle, Australia, is 74%.

How much does it rain in Newcastle in December?

In Newcastle, in December, during 14 rainfall days, 40mm (1.57") of precipitation is typically accumulated.

What is the sea temperature in December in Newcastle?

In Newcastle, Australia, the average seawater temperature in December is 22.6°C (72.7°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 22.6°C (72.7°F).

When are the longest days in Newcastle?

The month with the longest days in Newcastle is December, with an average of 14.3h of daylight.

How many hours of daylight does Newcastle have in December?

In December, the average length of the day in Newcastle is 14.3h.

What is the month with the most sunshine in Newcastle?

November and December, with an average of 9.8h of sunshine, are months with the most sunshine.

How many hours of sunshine does Newcastle have in December?

In Newcastle, Australia, the average sunshine in December is 9.8h.

What is the month with the highest UV index in Newcastle?

Months with the highest UV index in Newcastle, Australia, are January, February, November and December, with an average maximum UV index of 6.

What is the UV index intensity in December in Newcastle?

In Newcastle, Australia, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.
Average temperature in December - Newcastle, Australia
  • Average high temperature in December: 25.3°C

The warmest month (with the highest average high temperature) is January (26.7°C).
The month with the lowest average high temperature is July (16.3°C).

  • Average low temperature in December: 18.7°C

The month with the highest average low temperature is January (20.3°C).
The coldest month (with the lowest average low temperature) is August (10.8°C).

Average humidity in December - Newcastle, Australia
  • Average humidity in December: 74%

The month with the highest relative humidity is February (77%).
Months with the lowest relative humidity are August and September (69%).

Average rainfall in December - Newcastle, Australia
  • Average rainfall in December: 40mm

The wettest month (with the highest rainfall) is February (79mm).
The driest month (with the lowest rainfall) is August (34mm).

Average rainfall days in December - Newcastle, Australia
  • Average rainfall days in December: 14 days

The month with the highest number of rainy days is March (15.6 days).
The month with the lowest number of rainy days is August (10.2 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 / Average sunshine 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).

  • Average sunshine in December: 9.8h

Months with most sunshine are November and December (Average sunshine: 9.8h).
The month with least sunshine is June (Average sunshine: 5.8h).

Average UV index in December - Newcastle, Australia
  • Average UV index in December: 6

Months with the highest UV index are January, February, November and December (UV index 6).
Months with the lowest UV index are May, June, July and August (UV index 4).