December weather forecastShellharbour, Australia
December
Weather in December
December, the first month of the summer in Shellharbour, is a moderately hot month, with an average temperature ranging between min 17.5°C (63.5°F) and max 24.1°C (75.4°F).Temperature
December's presence records an average high-temperature of a moderately hot 24.1°C (75.4°F), closely mirroring November's climate. The temperature in Shellharbour dips to an average of 17.5°C (63.5°F) during December nights.Humidity
In Shellharbour, the average relative humidity in December is 74%.Rainfall
In December, the rain falls for 15.5 days. Throughout December, 56mm (2.2") of precipitation is accumulated. In Shellharbour, during the entire year, the rain falls for 169 days and collects up to 678mm (26.69") of precipitation.Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year in Shellharbour.On the first day of the month, sunrise is at 5:36 am and sunset at 7:54 pm. On the last day of December, sunrise is at 5:46 am and sunset at 8:12 pm AEDT.
Sunshine
In Shellharbour, the average sunshine in December is 9.7h.UV index
The months with the highest UV index in Shellharbour are January and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index, 6 during December, leads to the following recommendations:
Fend off overexposure. Sun protection is vital. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shellharbour, Australia
- Average high temperature in December: 24.1°C
The warmest month (with the highest average high temperature) is January (25.7°C).
The month with the lowest average high temperature is July (15.7°C).
- Average low temperature in December: 17.5°C
The months with the highest average low temperature are January and February (19°C).
The coldest month (with the lowest average low temperature) is July (9.7°C).
Average pressure in December
Shellharbour, Australia
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is June (1020.8mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in December
Shellharbour, Australia
- Average wind speed in December: 14.7km/h
The windiest month (with the highest average wind speed) is August (16.2km/h).
The calmest month (with the lowest average wind speed) is April (13.9km/h).
Average humidity in December
Shellharbour, Australia
- Average humidity in December: 74%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Shellharbour, Australia
- Average rainfall in December: 56mm
The wettest month (with the highest rainfall) is February (97mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in December
Shellharbour, Australia
- Average rainfall days in December: 15.5 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (9.5 days).
Average daylight in December /
Average sunshine in December
Shellharbour, Australia
- Average daylight in December: 14h and 24min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in December: 9h and 42min
The month with the most sunshine is November (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in December
Shellharbour, Australia
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (19.5 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in December
Shellharbour, Australia
- Average UV index in December: 6
The months with the highest UV index are January and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in December
Shellharbour, Australia
- Average cloud cover in December: 38
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Shellharbour, 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).
