December weather forecastMelbourne, Australia
December
Weather in December
Welcoming Summer, December's transition breathes warmth into Melbourne as daytime temperatures reach a monthly average high of 23.7°C (74.7°F). Sea temperatures continue to rise, inviting locals and tourists to participate in water sports or beach outings. The noticeably lengthened hours of daylight and an equal increase in sunshine hours make December in Melbourne particularly conducive for outdoor activities. Nonetheless, the wind speeds slightly increase to level out at 11.1 Kph. Crowning the year with festive cheer and sunny warmth, Melbourne in December symbolizes the charm of an Australian Summer.Temperature
The beginning of December in Melbourne records an average high-temperature of a warm 23.7°C (74.7°F), marking a negligible difference from November's 21.5°C (70.7°F). During December, the nighttime temperature averages of 12.7°C (54.9°F).Humidity
In December, the average relative humidity is 65%.Rainfall
The wettest months in Melbourne are August and December, with an average 45mm (1.77") of rainfall.Sea temperature
In Melbourne, in December, the average water temperature is 17.5°C (63.5°F).Note: Swimming is not an enjoyable activity for the majority when the water is at 17.5°C (63.5°F). The difficulty of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
December has the longest days of the year in Melbourne, with an average of 14h and 42min of daylight.On the first day of December, sunrise is at 5:51 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 8:45 pm AEDT.
Sunshine
With an average of 9.8h of sunshine, December has the most sunshine of the year in Melbourne.UV index
January through March, October through December, with an average maximum UV index of 5, are months with the highest UV index in Melbourne. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 5 during December, leads to the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Melbourne, Australia
- Average high temperature in December: 23.7°C
The warmest month (with the highest average high temperature) is January (25.8°C).
The month with the lowest average high temperature is July (12.4°C).
- Average low temperature in December: 12.7°C
The month with the highest average low temperature is February (14.8°C).
The coldest month (with the lowest average low temperature) is August (6.6°C).
Average pressure in December
Melbourne, Australia
- Average pressure in December: 1012.6mbar
The month with the highest atmospheric pressure is June (1021.4mbar).
The month with the lowest atmospheric pressure is January (1012.3mbar).
Average wind speed in December
Melbourne, Australia
- Average wind speed in December: 11.1km/h
The windiest month (with the highest average wind speed) is August (13.9km/h).
The calmest month (with the lowest average wind speed) is April (10.6km/h).
Average humidity in December
Melbourne, Australia
- Average humidity in December: 65%
The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is January (63%).
Average rainfall in December
Melbourne, Australia
- Average rainfall in December: 45mm
The wettest months (with the highest rainfall) are August and December (45mm).
The driest months (with the least rainfall) are March and April (34mm).
Average rainfall days in December
Melbourne, Australia
- Average rainfall days in December: 12.2 days
The months with the highest number of rainy days are July and August (16.9 days).
The month with the least rainy days is January (9.5 days).
Average sea temperature in December
Melbourne, Australia
- Average sea temperature in December: 17.5°C
The best month for swimming (with the highest average sea temperature) is February (18.8°C).
The coldest month (with the lowest average sea temperature) is September (14.7°C).
Average daylight in December /
Average sunshine in December
Melbourne, Australia
- Average daylight in December: 14h and 42min
The month with the longest days is December (Average daylight: 14h and 42min).
The month with the shortest days is June (Average daylight: 9h and 36min).
- Average sunshine in December: 9h and 48min
The month with the most sunshine is December (Average sunshine: 9h and 48min).
The months with the least sunshine are July and August (Average sunshine: 6h and 30min).
Average sunshine days in December
Melbourne, Australia
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is January (16.7 days).
The months with the least sunshine days are July and August (10.5 days).
Average UV index in December
Melbourne, Australia
- Average UV index in December: 5
The months with the highest UV index are January, February, March, October, November and December (UV index 5).
The months with the lowest UV index are May, June, July, August and September (UV index 3).
Average cloud cover in December
Melbourne, Australia
- Average cloud cover in December: 33
The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility in December
Melbourne, Australia
- Average visibility in December: 9km
The months with the highest visibility are January, February and March (10km).
The months with the lowest visibility are April, May, June, July, August, September, October, November and December (9km).
