December weather forecast and climate
Ceduna, Australia

The first month of the summer, December, is still a warm month in Ceduna, Australia, with temperature in the range of an average low of 18.4°C (65.1°F) and an average high of 27.3°C (81.1°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a still warm 27.3°C (81.1°F). In Ceduna, the average low-temperature is 18.4°C (65.1°F).

Heat index

The average heat index in December is calculated to 27.9°C (82.2°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

With an average relative humidity of 53%, December is the least humid month in Ceduna.

Rainfall

In Ceduna, during December, the rain falls for 6.2 days and regularly aggregates up to 14mm (0.55") of precipitation. In Ceduna, Australia, during the entire year, the rain falls for 103.6 days and collects up to 213mm (8.39") of precipitation.

Sea temperature

In Ceduna, Australia, the average seawater temperature in December is 19.2°C (66.6°F).
Note: For swimming, a surface water temperature of 19.2°C (66.6°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 14.2h of daylight, December has the longest days of the year.

Sunshine

The average sunshine in Ceduna is 9.2h.

UV index

December is the month with the highest UV index in Ceduna, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Ceduna?

In December, in Ceduna, Australia, the average high-temperature is 27.3°C (81.1°F), and the average low-temperature is 18.4°C (65.1°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that combines air temperature and relative humidity, in December is estimated at 27.9°C (82.2°F).

What is the least humid month in Ceduna?

December is the least humid month in Ceduna, with an average relative humidity of 53%.

What is the average humidity in December in Ceduna?

The average relative humidity in December in Ceduna, Australia, is 53%.

How many days does it rain in December in Ceduna?

In Ceduna, Australia, in December, it is raining for 6.2 days, with typically 14mm (0.55") of accumulated precipitation.

What is the sea temperature in December in Ceduna?

In Ceduna, in December, the average water temperature is 19.2°C (66.6°F). Swimming in 19.2°C (66.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

When are the longest days in Ceduna?

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

How many hours of daylight does Ceduna have in December?

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

How many hours of sunshine does Ceduna have in December?

In December, the average sunshine in Ceduna is 9.2h.

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

The month with the highest UV index in Ceduna is December, with an average maximum UV index of 7.

What is the UV index reading in December in Ceduna?

The average daily maximum UV index in December in Ceduna, Australia, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Ceduna, Australia
  • Average high temperature in December: 27.3°C

The warmest month (with the highest average high temperature) is January (28.7°C).
The month with the lowest average high temperature is July (16.8°C).

  • Average low temperature in December: 18.4°C

The month with the highest average low temperature is January (19.5°C).
The coldest month (with the lowest average low temperature) is August (11.1°C).

Average pressure in December - Ceduna, Australia
  • Average pressure in December: 1012.9mbar

The month with the highest atmospheric pressure is June (1022.6mbar).
The month with the lowest atmospheric pressure is January (1012.1mbar).

Average wind speed in December - Ceduna, Australia
  • Average wind speed in December: 20.9km/h

The windiest month (with the highest average wind speed) is January (21.4km/h).
The calmest month (with the lowest average wind speed) is April (16.8km/h).

Average humidity in December - Ceduna, Australia
  • Average humidity in December: 53%

Months with the highest relative humidity are June, July and August (63%).
The month with the lowest relative humidity is December (53%).

Average rainfall in December - Ceduna, Australia
  • Average rainfall in December: 14mm

The wettest months (with the highest rainfall) are August and November (24mm).
The driest month (with the least rainfall) is September (12mm).

Average rainfall days in December - Ceduna, Australia
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is February (5.2 days).

Average sea temperature in December - Ceduna, Australia
  • Average sea temperature in December: 19.2°C

The best month for swimming (with the highest average sea temperature) is January (19.8°C).
The coldest month (with the lowest average sea temperature) is August (15.8°C).

Average daylight in December / Average sunshine in December - Ceduna, 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: 9.2h

The month with the most sunshine is February (Average sunshine: 9.3h).
Months with the least sunshine are May and June (Average sunshine: 8).

Average sunshine days in December - Ceduna, Australia
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is July (14.8 days).

Average UV index in December - Ceduna, Australia
  • Average UV index in December: 7

The month with the highest UV index is December (UV index 7).
Months with the lowest UV index are May, June, July and August (UV index 4).

Average cloud cover in December - Ceduna, Australia
  • Average cloud cover in December: 20

Months with the most cloud cover are May, June and July (Cloud cover 31).
The month with the least cloud cover is February (Cloud cover 18).

Average visibility in December - Ceduna, 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).