Melbourne
Australia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Melbourne, Australia

December, the first month of the summer, in Melbourne, is a moderately hot month, with average temperature fluctuating between 12.7°C (54.9°F) and 23.7°C (74.7°F).

Temperature

In December, the average high-temperature is practically the same as in November - a warm 23.7°C (74.7°F). In December, in Melbourne, the average low-temperature is 12.7°C (54.9°F).

Humidity

The average relative humidity in Melbourne is 65%.

Rainfall

Months with the most rainfall are August and December, with an average 45mm (1.77") of precipitation.

Sea temperature

In December, the average sea temperature is 17.5°C (63.5°F).
Note: For swimming, a surface water temperature of 17.5°C (63.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

With an average of 14.7h of daylight, December has the longest days of the year in Melbourne.

Sunshine

The month with the most sunshine in Melbourne is December, with an average of 9.8h of sunshine.

UV index

Months with the highest UV index are January through March, October through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in December interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in December in Melbourne?

In December, in Melbourne, Australia, the average high-temperature is 23.7°C (74.7°F), and the average low-temperature is 12.7°C (54.9°F).

What is the average humidity in December in Melbourne?

In Melbourne, Australia, the average relative humidity in December is 65%.

How many days does it rain in December in Melbourne?

In December, in Melbourne, Australia, the rain falls for 12.2 days. Throughout December, 45mm (1.77") of precipitation is accumulated.

What is the wettest month in Melbourne?

The wettest months in Melbourne are August and December, with an average 45mm (1.77") of rainfall.

How cold is the water in December in Melbourne?

In Melbourne, the average seawater temperature in December is 17.5°C (63.5°F). For most, swimming in 17.5°C (63.5°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

When are the longest days in Melbourne?

December has the longest days of the year, with an average of 14.7h of daylight.

What is the average length of the day in December in Melbourne?

In December, the average length of the day is 14.7h.

What month has the most sunshine in Melbourne?

December has the most sunshine of the year in Melbourne, Australia, with an average of 9.8h of sunshine.

How many hours of sunshine does Melbourne have in December?

In Melbourne, Australia, the average sunshine in December is 9.8h.

What are the months with the highest UV index in Melbourne?

January through March, October through December, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index intensity in December in Melbourne?

In December, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
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 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

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: 14.7h

The month with the longest days is December (Average daylight: 14.7h).
The month with the shortest days is June (Average daylight: 9.6h).

  • Average sunshine in December: 9.8h

The month with the most sunshine is December (Average sunshine: 9.8h).
Months with the least sunshine are July and August (Average sunshine: 6.5).

Average UV index in December - Melbourne, Australia
  • Average UV index in December: 5

Months with the highest UV index are January, February, March, October, November and December (UV index 5).
Months with the lowest UV index are May, June, July, August and September (UV index 3).