Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The ushering in of December brings an average high-temperature of a moderately hot 24.1°C (75.4°F), closely mirroring the 22.4°C (72.3°F) of November. In Lake Illawarra, the average nighttime temperature during December is an enjoyable 17.5°C (63.5°F).Humidity
The average relative humidity in December in Lake Illawarra is 74%.Rainfall
In Lake Illawarra, during December, the rain falls for 15.5 days and regularly aggregates up to 56mm (2.2") of precipitation. Throughout the year, in Lake Illawarra, there are 169 rainfall days, and 678mm (26.69") of precipitation is accumulated.Sea temperature
In Lake Illawarra, in December, the average water temperature is 21.1°C (70°F).Note: Swimming in 21.1°C (70°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
Daylight
December has the longest days of the year in Lake Illawarra, with an average of 14h and 24min of daylight.On the first day of December in Lake Illawarra, sunrise is at 5:36 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:12 pm AEDT.
Sunshine
The average sunshine in December is 9.7h.UV index
January and December, with an average maximum UV index of 6, are months with the highest UV index in Lake Illawarra. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 6 in December translates into these instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
Frequently asked questions
What are December temperatures in Lake Illawarra?
What is the average humidity in December in Lake Illawarra?
How much does it rain in Lake Illawarra in December?
How cold is the water in December in Lake Illawarra?
When are the longest days in Lake Illawarra?
How many hours of daylight does Lake Illawarra have in December?
When are sunrise and sunset in December in Lake Illawarra?
How long on average sun shines in December in Lake Illawarra?
What are the months with the highest UV index in Lake Illawarra?
How high is the UV index in December in Lake Illawarra?
Average temperature in December
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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 sea temperature in December
Lake Illawarra, Australia
- Average sea temperature in December: 21.1°C
The best month for swimming (with the highest average sea temperature) is February (23.5°C).
The coldest month (with the lowest average sea temperature) is August (18.1°C).
Average daylight in December /
Average sunshine in December
Lake Illawarra, Australia
- Average daylight in December: 14h and 2min
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 4min
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
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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
Lake Illawarra, 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).
Lake Illawarra, Australia
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