December weather forecastAdelaide, Australia
December
Weather in December
In December, Adelaide marks the switch from the pleasant spring weather to the warm embrace of summer. With an average high of 24.5°C (76.1°F) and low humidity of 59%, summer activities like surfing, swimming, and hiking come into full swing. Longer daylight, approximately 14.5 hours, indicates the start of the summer solstice. The prevalence of bright days with 10.1 hours of sunshine make it a lively period for holiday-makers. As January arrives, it continues the summer narrative, but with an increment in temperature and humidity.Temperature
The onset of December brings with it an average high-temperature of a warm 24.5°C (76.1°F), showing a negligible variation from the month before. Adelaide, in December, experiences an average temperature of 16°C (60.8°F) at night.Humidity
The average relative humidity in December in Adelaide is 59%.Rainfall
In Adelaide, during December, the rain falls for 9.5 days and regularly aggregates up to 24mm (0.94") of precipitation. In Adelaide, during the entire year, the rain falls for 126.2 days and collects up to 326mm (12.83") of precipitation.Sea temperature
In Adelaide, Australia, the average seawater temperature in December is 18°C (64.4°F).Note: For most people, swimming in water at 18°C (64.4°F) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
With an average of 14h and 30min of daylight, December has the longest days of the year in Adelaide.On the first day of December in Adelaide, 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 8:32 pm ACDT.
Sunshine
The month with the most sunshine in Adelaide is December, with an average of 10.1h of sunshine.UV index
February and December, with an average maximum UV index of 6, are months with the highest UV index in Adelaide. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 6 leads to the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, Australia
- Average sea temperature in December: 18°C
The best month for swimming (with the highest average sea temperature) is February (20°C).
The coldest months (with the lowest average sea temperature) are August, September and October (15°C).
Average daylight in December /
Average sunshine in December
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, 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
Adelaide, 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).
