December weather forecastNewcastle, Australia
December
Weather in December
December in Newcastle experiences the warmth of full summer, with high temperatures, heightened humidity, and mild showers. The amount of rainfall reduces compared to November and the city receives plentiful sunshine. Sea temperatures peak for the year, attracting large crowds to the beaches. The calming sea breeze coupled with the wind strength, create a welcome respite from the heat. With long daylight hours and excellent visibility, December fosters an enjoyment of outdoor activities throughout the holiday season.Temperature
December's weather displays an average high-temperature of a still moderately hot 25.3°C (77.5°F), slightly varied from November's 23.7°C (74.7°F). During the nights in December, the temperature averages to an enjoyable 18.7°C (65.7°F).Humidity
The average relative humidity in December is 74%.Rainfall
In Newcastle, during December, the rain falls for 14 days and regularly aggregates up to 40mm (1.57") of precipitation. In Newcastle, during the entire year, the rain falls for 160.9 days and collects up to 620mm (24.41") of precipitation.Sea temperature
In Newcastle, the average seawater temperature in December is 22.6°C (72.7°F).Note: Taking into account a person's sensitivity to the cold, given sunshine, wind, and air temperature, swimming in 22.6°C (72.7°F) might be pleasant. (FYI: The water temperature set for the Olympic swimming event is between 25°C (77°F) and 28°C (82.4°F).)
Daylight
The month with the longest days is December, with an average of 14h and 18min of daylight.On the first day of the month, sunrise is at 5:37 am and sunset at 7:46 pm. On the last day of December, sunrise is at 5:47 am and sunset at 8:04 pm AEDT.
Sunshine
The months with the most sunshine in Newcastle are November and December, with an average of 9.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 6, are months with the highest UV index in Newcastle. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 6 during December, leads to the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Warning! The reflection of sand and water increases the UV dose.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 pressure in December
Newcastle, Australia
- Average pressure in December: 1013.4mbar
The month with the highest atmospheric pressure is June (1020.9mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).
Average wind speed in December
Newcastle, Australia
- Average wind speed in December: 15.8km/h
The windiest month (with the highest average wind speed) is August (16.7km/h).
The calmest month (with the lowest average wind speed) is April (14.1km/h).
Average humidity in December
Newcastle, Australia
- Average humidity in December: 74%
The month with the highest relative humidity is February (77%).
The 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 least 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 least 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: 14h and 18min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in December: 9h and 48min
The months with the most sunshine are November and December (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).
Average sunshine days in December
Newcastle, Australia
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is August (18.3 days).
The month with the least sunshine days is February (12.4 days).
Average UV index in December
Newcastle, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February, November and December (UV index 6).
The months with the lowest UV index are May, June, July and August (UV index 4).
Average cloud cover in December
Newcastle, Australia
- Average cloud cover in December: 35
The month with the most cloud cover is February (Cloud cover 39).
The months with the least cloud cover are August and September (Cloud cover 24).
Average visibility in December
Newcastle, Australia
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
