December, the first month of the summer in
Sydney Olympic Park, is still a warm month, with temperature in the range of an average low of 17.9°C (64.2°F) and an average high of 27.4°C (81.3°F).
Temperature
The commencement of December notes an average high-temperature of a still warm 27.4°C (81.3°F), exhibiting little difference from the previous month. December's average low-temperature reading in Sydney Olympic Park settles at a comfortable 17.9°C (64.2°F).
Heat index
The heat index value for December is appraised at 28°C (82.4°F). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
The heat index's values are generally associated with conditions in shade and light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
In December, the average relative humidity is 50%.
Rainfall
In December, in Sydney Olympic Park, the rain falls for 9.3 days. Throughout December, 58mm (2.28") of precipitation is accumulated. In Sydney Olympic Park, during the entire year, the rain falls for 117.6 days and collects up to 885mm (34.84") of precipitation.
Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year in Sydney Olympic Park.
On the first day of December, sunrise is at 5:37 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:09 pm AEDT.