December weather forecastMandurah, Australia
December
Weather in December
December, the first month of the summer in Mandurah, is a moderately hot month, with an average temperature fluctuating between 17.2°C (63°F) and 25.1°C (77.2°F).Temperature
Mandurah's December showcases an average high-temperature of a warm 25.1°C (77.2°F), hardly distinct from November's 22.6°C (72.7°F). In December, the temperature drops to an average of 17.2°C (63°F) at night.Humidity
In December, the average relative humidity is 62%.Rainfall
The month with the least rainfall is December, when the rain falls for 4.5 days and typically collects 7mm (0.28") of precipitation.Sea temperature
In Mandurah, in December, the average water temperature is 20.6°C (69.1°F).Note: For the majority, swimming in water with a temperature of 20.6°C (69.1°F) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).
Daylight
With an average of 14h and 12min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 5:02 am and sunset at 7:09 pm. On the last day of December, in Mandurah, sunrise is at 5:12 am and sunset at 7:27 pm AWST.
Sunshine
The average sunshine in December is 11.4h.UV index
January, February and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 6 suggests this advice:
Shield from overexposure. Defense against sun-related harm is required. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mandurah, Australia
- Average high temperature in December: 25.1°C
The warmest month (with the highest average high temperature) is February (27.2°C).
The month with the lowest average high temperature is July (16.4°C).
- Average low temperature in December: 17.2°C
The month with the highest average low temperature is February (19°C).
The coldest months (with the lowest average low temperature) are August and September (11.8°C).
Average pressure in December
Mandurah, Australia
- Average pressure in December: 1013.1mbar
The month with the highest atmospheric pressure is July (1020.3mbar).
The month with the lowest atmospheric pressure is January (1012mbar).
Average wind speed in December
Mandurah, Australia
- Average wind speed in December: 19.8km/h
The windiest month (with the highest average wind speed) is January (20.1km/h).
The calmest month (with the lowest average wind speed) is April (16.7km/h).
Average humidity in December
Mandurah, Australia
- Average humidity in December: 62%
The months with the highest relative humidity are July and August (74%).
The month with the lowest relative humidity is January (61%).
Average rainfall in December
Mandurah, Australia
- Average rainfall in December: 7mm
The wettest month (with the highest rainfall) is June (79mm).
The driest month (with the least rainfall) is December (7mm).
Average rainfall days in December
Mandurah, Australia
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (3.3 days).
Average sea temperature in December
Mandurah, Australia
- Average sea temperature in December: 20.6°C
The best month for swimming (with the highest average sea temperature) is March (22.8°C).
The coldest month (with the lowest average sea temperature) is September (18.3°C).
Average daylight in December /
Average sunshine in December
Mandurah, Australia
- Average daylight in December: 14h and 12min
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 0min).
- Average sunshine in December: 11h and 24min
The month with the most sunshine is January (Average sunshine: 11h and 30min).
The month with the least sunshine is August (Average sunshine: 5h and 36min).
Average sunshine days in December
Mandurah, Australia
- Average sunshine days in December: 25.4 days
The month with the most sunshine days is December (25.4 days).
The month with the least sunshine days is August (10.7 days).
Average UV index in December
Mandurah, 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 June, July, August and September (UV index 4).
Average cloud cover in December
Mandurah, Australia
- Average cloud cover in December: 15
The month with the most cloud cover is July (Cloud cover 40).
The month with the least cloud cover is January (Cloud cover 13).
Average visibility in December
Mandurah, 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).
