December weather forecastCairns, Australia
December
Weather in December
December welcomes the wet season in Cairns making it the beginning of the summer period. It offers high temperatures, making it the start of the hot Australian summer. Frequent rain showers with high potential for thunderstorms are seen throughout the month. The festive mood in the city is ramped up by high humidity levels, completing the tropical Christmas experience. The heavy showers provide a stark contrast to the summer heat, making December weather unique in Cairns.Temperature
With December's advent, Cairns sees an average high-temperature of a still warm 29.2°C (84.6°F), subtly shifted from November's 28.5°C (83.3°F). In Cairns, December's nights observe an average temperature dip to a still warm 23.5°C (74.3°F).Heat index
Throughout December, the heat index is calculated to be a tropical 34°C (93.2°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.Heat index specifics point out values are for conditions of shade and a slight breeze. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In December, the average relative humidity in Cairns is 76%.Rainfall
In Cairns, in December, during 15.2 rainfall days, 79mm (3.11") of precipitation is typically accumulated. Throughout the year, in Cairns, Australia, there are 167.3 rainfall days, and 652mm (25.67") of precipitation is accumulated.Sea temperature
In Cairns, in December, the average water temperature is 29°C (84.2°F).Note: Water activities including swimming and diving at temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.
Daylight
The month with the longest days is December, with an average of 13h and 6min of daylight.On the first day of the month, sunrise is at 5:34 am and sunset at 6:37 pm. On the last day of December, sunrise is at 5:46 am and sunset at 6:53 pm AEST.
Sunshine
In Cairns, Australia, the average sunshine in December is 10.3h.UV index
In Cairns, the average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during December translates into the following guidance:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cairns, Australia
- Average high temperature in December: 29.2°C
The warmest month (with the highest average high temperature) is February (29.4°C).
The month with the lowest average high temperature is July (23.2°C).
- Average low temperature in December: 23.5°C
The months with the highest average low temperature are January and February (24.3°C).
The coldest month (with the lowest average low temperature) is August (18°C).
Average pressure in December
Cairns, Australia
- Average pressure in December: 1009.4mbar
The month with the highest atmospheric pressure is July (1016.8mbar).
The month with the lowest atmospheric pressure is January (1007.6mbar).
Average wind speed in December
Cairns, Australia
- Average wind speed in December: 11.5km/h
The windiest month (with the highest average wind speed) is May (17.2km/h).
The calmest month (with the lowest average wind speed) is February (11.2km/h).
Average humidity in December
Cairns, Australia
- Average humidity in December: 76%
The month with the highest relative humidity is March (81%).
The months with the lowest relative humidity are September and October (74%).
Average rainfall in December
Cairns, Australia
- Average rainfall in December: 79mm
The wettest month (with the highest rainfall) is January (162mm).
The driest month (with the least rainfall) is September (9mm).
Average rainfall days in December
Cairns, Australia
- Average rainfall days in December: 15.2 days
The month with the highest number of rainy days is January (22.4 days).
The month with the least rainy days is September (7.2 days).
Average sea temperature in December
Cairns, Australia
- Average sea temperature in December: 29°C
The best month for swimming (with the highest average sea temperature) is January (29.5°C).
The coldest month (with the lowest average sea temperature) is July (23.8°C).
Average daylight in December /
Average sunshine in December
Cairns, Australia
- Average daylight in December: 13h and 6min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 6min).
- Average sunshine in December: 10h and 18min
The months with the most sunshine are October and November (Average sunshine: 10h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in December
Cairns, Australia
- Average sunshine days in December: 11.6 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in December
Cairns, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February and November (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in December
Cairns, Australia
- Average cloud cover in December: 36
The months with the most cloud cover are January and March (Cloud cover 45).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in December
Cairns, 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).
