December weather forecastSeacliff, Australia
December
Weather in December
December, the first month of the summer in Seacliff, is a moderately hot month, with an average temperature fluctuating between 16°C (60.8°F) and 24.5°C (76.1°F).Temperature
Seacliff notes an average high-temperature of a warm 24.5°C (76.1°F) in December, displaying minor variation from November. An average low-temperature of 16°C (60.8°F) marks the nights throughout December.Humidity
The average relative humidity in December is 59%.Rainfall
In Seacliff, in December, it is raining for 9.5 days, with typically 24mm (0.94") of accumulated precipitation. Throughout the year, in Seacliff, there are 126.2 rainfall days, and 326mm (12.83") of precipitation is accumulated.Sea temperature
In Seacliff, in December, the average water temperature is 18.9°C (66°F).Note: Swimming is not a pleasant activity for most when the water temperature is 18.9°C (66°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.
Daylight
December has the longest days of the year in Seacliff, with an average of 14h and 30min of daylight.On the first day of December in Seacliff, sunrise is at 5:54 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 8:33 pm ACDT.
Sunshine
The month with the most sunshine in Seacliff is December, with an average of 10.1h of sunshine.UV index
The months with the highest UV index in Seacliff are February and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 6 translates into these guidelines:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Seacliff, Australia
- Average high temperature in December: 24.5°C
The warmest month (with the highest average high temperature) is January (26.3°C).
The month with the lowest average high temperature is July (13.9°C).
- Average low temperature in December: 16°C
The month with the highest average low temperature is January (17.8°C).
The coldest month (with the lowest average low temperature) is August (9.1°C).
Average pressure in December
Seacliff, Australia
- Average pressure in December: 1013mbar
The month with the highest atmospheric pressure is June (1021.8mbar).
The month with the lowest atmospheric pressure is January (1012.4mbar).
Average wind speed in December
Seacliff, Australia
- Average wind speed in December: 14.3km/h
The windiest month (with the highest average wind speed) is August (16.3km/h).
The calmest month (with the lowest average wind speed) is April (12.9km/h).
Average humidity in December
Seacliff, Australia
- Average humidity in December: 59%
The months with the highest relative humidity are June and July (74%).
The month with the lowest relative humidity is January (58%).
Average rainfall in December
Seacliff, Australia
- Average rainfall in December: 24mm
The wettest month (with the highest rainfall) is August (43mm).
The driest month (with the least rainfall) is March (16mm).
Average rainfall days in December
Seacliff, Australia
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is February (6.2 days).
Average sea temperature in December
Seacliff, Australia
- Average sea temperature in December: 18.9°C
The best month for swimming (with the highest average sea temperature) is January (20.3°C).
The coldest month (with the lowest average sea temperature) is August (13.8°C).
Average daylight in December /
Average sunshine in December
Seacliff, Australia
- Average daylight in December: 14h and 30min
The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).
- Average sunshine in December: 10h and 6min
The month with the most sunshine is December (Average sunshine: 10h and 6min).
The month with the least sunshine is August (Average sunshine: 7h and 6min).
Average sunshine days in December
Seacliff, Australia
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is August (12.7 days).
Average UV index in December
Seacliff, Australia
- Average UV index in December: 6
The months with the highest UV index are February and December (UV index 6).
The month with the lowest UV index is June (UV index 3).
Average cloud cover in December
Seacliff, Australia
- Average cloud cover in December: 25
The month with the most cloud cover is July (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 20).
Average visibility in December
Seacliff, 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).
