December weather forecastBlue Mountain, Australia
December
Weather in December
December, the first month of the summer in Blue Mountain, is still a warm month, with temperature in the range of an average high of 28.1°C (82.6°F) and an average low of 23.9°C (75°F).Temperature
Blue Mountain greets December with an average high-temperature of a still warm 28.1°C (82.6°F), marking a slight deviation from the preceding month. Blue Mountain experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 23.9°C (75°F) throughout December.Heat index
The heat index value during December is appraised at a tropical 32°C (89.6°F). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
The average relative humidity in December in Blue Mountain is 76%.Rainfall
In Blue Mountain, in December, during 15.1 rainfall days, 103mm (4.06") of precipitation is typically accumulated. Throughout the year, in Blue Mountain, there are 163.3 rainfall days, and 841mm (33.11") of precipitation is accumulated.Daylight
With an average of 13h and 24min of daylight, December has the longest days of the year in Blue Mountain.On the first day of December in Blue Mountain, sunrise is at 5:12 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 6:49 pm AEST.
Sunshine
In Blue Mountain, Australia, the average sunshine in December is 10.2h.UV index
February, November and December, with an average maximum UV index of 7, are months with the highest UV index in Blue Mountain. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 7 during December translates into the following directions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Blue Mountain, Australia
- Average high temperature in December: 28.1°C
The warmest month (with the highest average high temperature) is February (28.5°C).
The month with the lowest average high temperature is July (20.8°C).
- Average low temperature in December: 23.9°C
The months with the highest average low temperature are January and February (24.8°C).
The coldest month (with the lowest average low temperature) is July (16.7°C).
Average pressure in December
Blue Mountain, Australia
- Average pressure in December: 1010.4mbar
The month with the highest atmospheric pressure is July (1019mbar).
The month with the lowest atmospheric pressure is January (1008.7mbar).
Average wind speed in December
Blue Mountain, Australia
- Average wind speed in December: 17.1km/h
The windiest month (with the highest average wind speed) is March (19.3km/h).
The calmest month (with the lowest average wind speed) is August (14km/h).
Average humidity in December
Blue Mountain, Australia
- Average humidity in December: 76%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Blue Mountain, Australia
- Average rainfall in December: 103mm
The wettest month (with the highest rainfall) is March (175mm).
The driest month (with the least rainfall) is September (9mm).
Average rainfall days in December
Blue Mountain, Australia
- Average rainfall days in December: 15.1 days
The month with the highest number of rainy days is March (21.8 days).
The month with the least rainy days is August (5.8 days).
Average daylight in December /
Average sunshine in December
Blue Mountain, Australia
- Average daylight in December: 13h and 24min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in December: 10h and 12min
The month with the most sunshine is October (Average sunshine: 10h and 30min).
The months with the least sunshine are April, May and June (Average sunshine: 6h and 12min).
Average sunshine days in December
Blue Mountain, Australia
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is March (7.1 days).
Average UV index in December
Blue Mountain, Australia
- Average UV index in December: 7
The months with the highest UV index are February, November and December (UV index 7).
The months with the lowest UV index are May, June, July and August (UV index 5).
Average cloud cover in December
Blue Mountain, Australia
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
Blue Mountain, 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).
