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
December brings a slight elevation in the average high-temperature, transitioning from November's warm 26.4°C (79.5°F) to a still moderately hot 29.4°C (84.9°F). The nighttime average for Jarrahdale in December plummets considerably from its daytime counterpart, resting at an enjoyable 16.9°C (62.4°F).Heat index
For most parts of December, the heat index is calculated to be a hot 30°C (86°F). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In December, the average relative humidity is 51%.Rainfall
March and December are months with the least rain when the rain falls for 5 days and typically aggregates up to 9mm (0.35") of rain.Daylight
The month with the longest days in Jarrahdale is December, with an average of 14h and 12min of daylight.On the first day of the month, sunrise is at 5:01 am and sunset at 7:08 pm. On the last day of December, in Jarrahdale, sunrise is at 5:11 am and sunset at 7:25 pm AWST.
Sunshine
The months with the most sunshine are January and December, with an average of 11.5h of sunshine.UV index
The months with the highest UV index are January through March and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 6 during December morphs into the following directions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Jarrahdale in December?
What is the average humidity in December in Jarrahdale?
What is the driest month in Jarrahdale?
How much does it rain in Jarrahdale in December?
When are the longest days in Jarrahdale?
What is the average length of the day in December in Jarrahdale?
When is the sunrise / sunset in December in Jarrahdale?
What are the months with the most sunshine in Jarrahdale?
How long on average sun shines in December in Jarrahdale?
What is the month with the highest UV index in Jarrahdale?
What is the UV index reading in December in Jarrahdale?
Average temperature in December
Jarrahdale, Australia
- Average high temperature in December: 29.4°C
The warmest months (with the highest average high temperature) are January and February (31.2°C).
The month with the lowest average high temperature is July (16.7°C).
- Average low temperature in December: 16.9°C
The month with the highest average low temperature is February (18.8°C).
The coldest months (with the lowest average low temperature) are July, August and September (9.7°C).
Average pressure in December
Jarrahdale, Australia
- Average pressure in December: 1012.5mbar
The month with the highest atmospheric pressure is July (1020.6mbar).
The month with the lowest atmospheric pressure is January (1011.4mbar).
Average wind speed in December
Jarrahdale, Australia
- Average wind speed in December: 13.6km/h
The windiest month (with the highest average wind speed) is February (14.1km/h).
The calmest month (with the lowest average wind speed) is May (11.4km/h).
Average humidity in December
Jarrahdale, Australia
- Average humidity in December: 51%
The months with the highest relative humidity are July and August (75%).
The month with the lowest relative humidity is January (50%).
Average rainfall in December
Jarrahdale, Australia
- Average rainfall in December: 9mm
The wettest month (with the highest rainfall) is June (66mm).
The driest months (with the least rainfall) are March and December (9mm).
Average rainfall days in December
Jarrahdale, Australia
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (4.3 days).
Average daylight in December /
Average sunshine in December
Jarrahdale, Australia
- Average daylight in December: 14h and 1min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in December: 11h and 3min
The months with the most sunshine are January and December (Average sunshine: 11h and 30min).
The month with the least sunshine is August (Average sunshine: 5h and 30min).
Average sunshine days in December
Jarrahdale, Australia
- Average sunshine days in December: 24.7 days
The month with the most sunshine days is December (24.7 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Jarrahdale, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are May, June, July and August (UV index 4).
Average cloud cover in December
Jarrahdale, Australia
- Average cloud cover in December: 15
The month with the most cloud cover is July (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 13).
Average visibility in December
Jarrahdale, Australia
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, November and December (10km).
The months with the lowest visibility are July, August, September and October (9km).
Jarrahdale, Australia
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