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
December
Weather in December
Temperature
The start of December sees the average high-temperature at a still moderately hot 25.5°C (77.9°F), showing little difference from November's 23.8°C (74.8°F). Throughout December, a steady low-temperature average of 18.4°C (65.1°F) is noted.Humidity
The average relative humidity in December is 71%.Rainfall
In December, the rain falls for 10.5 days. Throughout December, 23mm (0.91") of precipitation is accumulated. In Mortdale, during the entire year, the rain falls for 139.8 days and collects up to 348mm (13.7") of precipitation.Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year in Mortdale.On the first day of the month, sunrise is at 5:37 am and sunset at 7:52 pm. On the last day of December, in Mortdale, Australia, sunrise is at 5:47 am and sunset at 8:10 pm AEDT.
Sunshine
In December, the average sunshine is 9.7h.UV index
The months with the highest UV index in Mortdale are January, February and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 6 in December transforms into the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Mortdale?
What is the average humidity in December in Mortdale?
How many days does it rain in December in Mortdale?
When are the longest days in Mortdale?
How many hours of daylight does Mortdale have in December?
When is the sunrise / sunset in December in Mortdale?
How long on average sun shines in December in Mortdale?
What are the months with the highest UV index in Mortdale?
What is the UV index intensity in December in Mortdale?
Average temperature in December
Mortdale, Australia
- Average high temperature in December: 25.5°C
The warmest month (with the highest average high temperature) is January (26.9°C).
The month with the lowest average high temperature is July (16.6°C).
- Average low temperature in December: 18.4°C
The months with the highest average low temperature are January and February (20.1°C).
The coldest month (with the lowest average low temperature) is July (10.1°C).
Average pressure in December
Mortdale, Australia
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is June (1020.8mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in December
Mortdale, Australia
- Average wind speed in December: 15.4km/h
The windiest month (with the highest average wind speed) is August (15.8km/h).
The calmest month (with the lowest average wind speed) is April (13.5km/h).
Average humidity in December
Mortdale, Australia
- Average humidity in December: 71%
The month with the highest relative humidity is February (75%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
Mortdale, Australia
- Average rainfall in December: 23mm
The wettest month (with the highest rainfall) is March (43mm).
The driest month (with the least rainfall) is September (17mm).
Average rainfall days in December
Mortdale, Australia
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (9.2 days).
Average daylight in December /
Average sunshine in December
Mortdale, Australia
- Average daylight in December: 14h and 2min
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 4min
The month with the most sunshine is November (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in December
Mortdale, Australia
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is July (17.6 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
Mortdale, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in December
Mortdale, Australia
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Mortdale, 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).
