Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
At the start of December, Onslow's average high-temperature reaches a still hot 32.3°C (90.1°F), subtly different from the preceding month. Onslow witnesses a consistent average low-temperature of 26°C (78.8°F) throughout December.Heat index
In December, the average heat index is calculated to be a sweltering 37°C (98.6°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.The metrics for the heat index are tailored for both shady environments and light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.
Humidity
In December, the average relative humidity in Onslow is 57%.Rainfall
In Onslow, in December, it is raining for 4 days, with typically 11mm (0.43") of accumulated precipitation. Throughout the year, in Onslow, there are 45.1 rainfall days, and 141mm (5.55") of precipitation is accumulated.Daylight
December has the longest days of the year, with an average of 13h and 24min of daylight.On the first day of the month, sunrise is at 5:27 am and sunset at 6:49 pm. On the last day of December, sunrise is at 5:39 am and sunset at 7:05 pm AWST.
Sunshine
In Onslow, Australia, the average sunshine in December is 11.9h.UV index
In December, the average daily maximum UV index in Onslow is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 7 during December leads to these instructions:
Fend off overexposure. Sun protection is vital. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
How hot is it in Onslow in December?
What is the average humidity in December in Onslow?
How much does it rain in Onslow in December?
When are the longest days in Onslow?
What is the average length of the day in December in Onslow?
What time are sunrise and sunset in December in Onslow?
How long on average sun shines in December in Onslow?
What is the UV index intensity in December in Onslow?
Average temperature in December
Onslow, Australia
- Average high temperature in December: 32.3°C
The warmest month (with the highest average high temperature) is March (33.7°C).
The month with the lowest average high temperature is July (24.8°C).
- Average low temperature in December: 26°C
The month with the highest average low temperature is March (28.4°C).
The coldest month (with the lowest average low temperature) is July (19.4°C).
Average pressure in December
Onslow, Australia
- Average pressure in December: 1006.8mbar
The month with the highest atmospheric pressure is July (1017.4mbar).
The month with the lowest atmospheric pressure is January (1005.2mbar).
Average wind speed in December
Onslow, Australia
- Average wind speed in December: 22.3km/h
The windiest month (with the highest average wind speed) is November (23.2km/h).
The calmest month (with the lowest average wind speed) is April (16.9km/h).
Average humidity in December
Onslow, Australia
- Average humidity in December: 57%
The month with the highest relative humidity is January (61%).
The months with the lowest relative humidity are May and July (49%).
Average rainfall in December
Onslow, Australia
- Average rainfall in December: 11mm
The wettest month (with the highest rainfall) is January (28mm).
The driest months (with the least rainfall) are September and October (1mm).
Average rainfall days in December
Onslow, Australia
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is January (9.1 days).
The months with the least rainy days are September and November (0.7 days).
Average daylight in December /
Average sunshine in December
Onslow, Australia
- Average daylight in December: 13h and 2min
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: 11h and 5min
The month with the most sunshine is November (Average sunshine: 12h and 6min).
The month with the least sunshine is June (Average sunshine: 7h and 6min).
Average sunshine days in December
Onslow, Australia
- Average sunshine days in December: 26.1 days
The month with the most sunshine days is October (29.6 days).
The month with the least sunshine days is January (20.1 days).
Average UV index in December
Onslow, Australia
- Average UV index in December: 7
The month with the highest UV index is February (UV index 8).
The months with the lowest UV index are May, June, July, August and September (UV index 6).
Average cloud cover in December
Onslow, Australia
- Average cloud cover in December: 11
The months with the most cloud cover are January and June (Cloud cover 18).
The month with the least cloud cover is September (Cloud cover 4).
Average visibility in December
Onslow, 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).
Onslow, Australia
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