December weather forecast and climate
Cottesloe, Australia

December, the first month of the summer, in Cottesloe, is also a moderately hot month, with average temperature ranging between min 17.9°C (64.2°F) and max 25.7°C (78.3°F).

Temperature

In Cottesloe, the average high-temperature is almost the same as in November - a still warm 25.7°C (78.3°F). The average low-temperature, in December, is 17.9°C (64.2°F).

Humidity

January, February and December, with an average relative humidity of 59%, are the least humid months.

Rainfall

In Cottesloe, during December, the rain falls for 5.2 days and regularly aggregates up to 12mm (0.47") of precipitation. In Cottesloe, during the entire year, the rain falls for 114 days and collects up to 404mm (15.91") of precipitation.

Sea temperature

In Cottesloe, the average seawater temperature in December is 20.8°C (69.4°F).
Note: Swimming in 20.8°C (69.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

With an average of 14.2h of daylight, December has the longest days of the year in Cottesloe.

Sunshine

January and December, with an average of 11.6h of sunshine, are months with the most sunshine in Cottesloe, Australia.

UV index

January through March and December, with an average maximum UV index of 6, are months with the highest UV index in Cottesloe. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in December in Cottesloe?

In December, in Cottesloe, Australia, the average high-temperature is 25.7°C (78.3°F), and the average low-temperature is 17.9°C (64.2°F).

What is the least humid month in Cottesloe?

January, February and December, with an average relative humidity of 59%, are the least humid months in Cottesloe, Australia.

What is the average humidity in December in Cottesloe?

The average relative humidity in December in Cottesloe is 59%.

How many days does it rain in December in Cottesloe?

In December, in Cottesloe, the rain falls for 5.2 days. Throughout December, 12mm (0.47") of precipitation is accumulated.

How cold is the water in December in Cottesloe?

In Cottesloe, Australia, in December, the average water temperature is 20.8°C (69.4°F). For swimming, a surface water temperature of 20.8°C (69.4°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).

When are the longest days in Cottesloe?

December has the longest days of the year in Cottesloe, with an average of 14.2h of daylight.

How many hours of daylight does Cottesloe have in December?

In December, the average length of the day in Cottesloe, Australia, is 14.2h.

What is the month with the most sunshine in Cottesloe?

Months with the most sunshine in Cottesloe, Australia, are January and December, with an average of 11.6h of sunshine.

How long on average sun shines in December in Cottesloe?

In Cottesloe, Australia, the average sunshine in December is 11.6h.

What is the month with the highest UV index in Cottesloe?

January through March and December, with an average maximum UV index of 6, are months with the highest UV index in Cottesloe.

How high is the UV index in December in Cottesloe?

In Cottesloe, the average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in December - Cottesloe, Australia
  • Average high temperature in December: 25.7°C

The warmest month (with the highest average high temperature) is February (27.7°C).
The month with the lowest average high temperature is July (17.2°C).

  • Average low temperature in December: 17.9°C

The month with the highest average low temperature is February (19.8°C).
The coldest months (with the lowest average low temperature) are July and August (12.2°C).

Average pressure in December - Cottesloe, Australia
  • Average pressure in December: 1012.6mbar

The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is January (1011.5mbar).

Average wind speed in December - Cottesloe, Australia
  • Average wind speed in December: 19.4km/h

The windiest month (with the highest average wind speed) is January (19.7km/h).
The calmest month (with the lowest average wind speed) is April (16.2km/h).

Average humidity in December - Cottesloe, Australia
  • Average humidity in December: 59%

The month with the highest relative humidity is August (72%).
Months with the lowest relative humidity are January, February and December (59%).

Average rainfall in December - Cottesloe, Australia
  • Average rainfall in December: 12mm

The wettest month (with the highest rainfall) is June (75mm).
The driest month (with the least rainfall) is March (11mm).

Average rainfall days in December - Cottesloe, Australia
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (4.3 days).

Average sea temperature in December - Cottesloe, Australia
  • Average sea temperature in December: 20.8°C

The best month for swimming (with the highest average sea temperature) is March (23.3°C).
The coldest month (with the lowest average sea temperature) is September (18.7°C).

Average daylight in December / Average sunshine in December - Cottesloe, Australia
  • Average daylight in December: 14.2h

The month with the longest days is December (Average daylight: 14.2h).
The month with the shortest days is June (Average daylight: 10.1h).

  • Average sunshine in December: 11.6h

Months with the most sunshine are January and December (Average sunshine: 11.6h).
The month with the least sunshine is August (Average sunshine: 5.7h).

Average sunshine days in December - Cottesloe, Australia
  • Average sunshine days in December: 24.2 days

The month with the most sunshine days is December (24.2 days).
The month with the least sunshine days is July (12.8 days).

Average UV index in December - Cottesloe, Australia
  • Average UV index in December: 6

Months with the highest UV index are January, February, March and December (UV index 6).
Months with the lowest UV index are June, July and August (UV index 4).

Average visibility in December - Cottesloe, Australia
  • Average visibility in December: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).