December weather forecastBlacktown, Australia
December
Weather in December
December, the first month of the summer in Blacktown, is still a warm month, with an average temperature fluctuating between 16.6°C (61.9°F) and 28°C (82.4°F).Temperature
Blacktown's average high-temperature in December sits at a still warm 28°C (82.4°F), showing little difference from the previous month. Throughout December, Blacktown experiences a low-temperature average of 16.6°C (61.9°F).Heat index
The heat index in December is evaluated at a hot 30°C (86°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.The standards for the heat index are set for locations in shade and under light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
In December, the average relative humidity in Blacktown is 68%.Rainfall
In Blacktown, during December, the rain falls for 11.6 days and regularly aggregates up to 30mm (1.18") of precipitation. In Blacktown, during the entire year, the rain falls for 130.1 days and collects up to 476mm (18.74") of precipitation.Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year in Blacktown, Australia.On the first day of the month, sunrise is at 5:38 am and sunset at 7:52 pm. On the last day of December, in Blacktown, sunrise is at 5:48 am and sunset at 8:10 pm AEDT.
Sunshine
In Blacktown, the average sunshine in December is 9.6h.UV index
January, February, October through December, with an average maximum UV index of 6, are months with the highest UV index in Blacktown, Australia. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Blacktown, Australia
- Average high temperature in December: 28°C
The warmest month (with the highest average high temperature) is January (29.6°C).
The months with the lowest average high temperature are June and July (16.6°C).
- Average low temperature in December: 16.6°C
The month with the highest average low temperature is January (18.3°C).
The coldest month (with the lowest average low temperature) is July (7.3°C).
Average pressure in December
Blacktown, Australia
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is June (1021.1mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).
Average wind speed in December
Blacktown, Australia
- Average wind speed in December: 8.9km/h
The windiest month (with the highest average wind speed) is September (9.1km/h).
The calmest month (with the lowest average wind speed) is April (7.8km/h).
Average humidity in December
Blacktown, Australia
- Average humidity in December: 68%
The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is September (65%).
Average rainfall in December
Blacktown, Australia
- Average rainfall in December: 30mm
The wettest month (with the highest rainfall) is February (87mm).
The driest month (with the least rainfall) is May (23mm).
Average rainfall days in December
Blacktown, Australia
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is February (13.9 days).
The month with the least rainy days is May (7.3 days).
Average daylight in December /
Average sunshine in December
Blacktown, 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 36min
The month with the most sunshine is November (Average sunshine: 9h and 42min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in December
Blacktown, Australia
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is May (21.8 days).
The month with the least sunshine days is February (11.6 days).
Average UV index in December
Blacktown, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August and September (UV index 4).
Average cloud cover in December
Blacktown, Australia
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Blacktown, Australia
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
