December weather forecast
Exmouth, Australia

Weather in December

The first month of the summer, December, is also a hot month in Exmouth, Australia, with average temperature fluctuating between 24.5°C (76.1°F) and 32.6°C (90.7°F).
The ideal sea water temperature of 26°C (78.8°F) and only 3.5 rainfall days, with 15mm (0.59") of accumulated rainfall, makes December the best time for swimming and other water activities.

Temperature

In Exmouth, the average high-temperature is practically the same as in November - a still hot 32.6°C (90.7°F). The average low-temperature, in Exmouth, is 24.5°C (76.1°F).

Heat index

The average heat index is calculated to be a torrid 37.2°C (99°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like clothing, differences in body mass, height, and shape, metabolic differences, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In December, the average relative humidity is 56%.

Rainfall

In December, the rain falls for 3.5 days. Throughout December, 15mm (0.59") of precipitation is accumulated. Throughout the year, in Exmouth, Australia, there are 43.8 rainfall days, and 141mm (5.55") of precipitation is accumulated.

Sea temperature

In Exmouth, Australia, the average seawater temperature in December is 26°C (78.8°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The month with the longest days in Exmouth is December, with an average of 13.5h of daylight.

Sunshine

In Exmouth, the average sunshine is 11.9h.

UV index

In Exmouth, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Exmouth?

In December, in Exmouth, Australia, the average high-temperature is 32.6°C (90.7°F), and the average low-temperature is 24.5°C (76.1°F). In December, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 37.2°C (99°F).

What is the average humidity in December in Exmouth?

In December, the average relative humidity in Exmouth, Australia, is 56%.

How many days does it rain in December in Exmouth?

In December, in Exmouth, Australia, the rain falls for 3.5 days. Throughout December, 15mm (0.59") of precipitation is accumulated.

What is the water temperature in December in Exmouth?

In Exmouth, the average seawater temperature in December is 26°C (78.8°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in Exmouth?

December has the longest days of the year, with an average of 13.5h of daylight.

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

In Exmouth, Australia, the average length of the day in December is 13.5h.

How long on average sun shines in December in Exmouth?

In December, the average sunshine in Exmouth is 11.9h.

How high is the UV index in December in Exmouth?

In Exmouth, Australia, the average daily maximum UV index in December is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Exmouth, Australia

Average temperature in December - Exmouth, Australia
  • Average high temperature in December: 32.6°C

The warmest month (with the highest average high temperature) is March (34.4°C).
The month with the lowest average high temperature is July (24.5°C).

  • Average low temperature in December: 24.5°C

The month with the highest average low temperature is February (27.3°C).
The coldest month (with the lowest average low temperature) is July (18.5°C).

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Average pressure in December
Exmouth, Australia

Average pressure in December - Exmouth, Australia
  • Average pressure in December: 1007.4mbar

The month with the highest atmospheric pressure is July (1017.7mbar).
The month with the lowest atmospheric pressure is January (1005.7mbar).

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Average wind speed in December
Exmouth, Australia

Average wind speed in December - Exmouth, Australia
  • Average wind speed in December: 24.4km/h

The windiest month (with the highest average wind speed) is November (24.6km/h).
The calmest month (with the lowest average wind speed) is April (18.2km/h).

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Average humidity in December
Exmouth, Australia

Average humidity in December - Exmouth, Australia
  • Average humidity in December: 56%

Months with the highest relative humidity are January and February (58%).
The month with the lowest relative humidity is May (48%).

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Average rainfall in December
Exmouth, Australia

Average rainfall in December - Exmouth, Australia
  • Average rainfall in December: 15mm

The wettest month (with the highest rainfall) is January (29mm).
The driest months (with the least rainfall) are September, October and November (1mm).

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Average rainfall days in December
Exmouth, Australia

Average rainfall days in December - Exmouth, Australia
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is January (8.3 days).
The month with the least rainy days is September (0.8 days).

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Average sea temperature in December
Exmouth, Australia

Average sea temperature in December - Exmouth, Australia
  • Average sea temperature in December: 26°C

The best months for swimming (with the highest average sea temperature) are February, March and April (28°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (24°C).

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Average daylight in December /
Average sunshine in December
Exmouth, Australia

Average daylight in December / Average sunshine in December - Exmouth, Australia
  • Average daylight in December: 13.5h

The month with the longest days is December (Average daylight: 13.5h).
The month with the shortest days is June (Average daylight: 10.8h).

  • Average sunshine in December: 11.9h

The month with the most sunshine is November (Average sunshine: 12.1h).
The month with the least sunshine is June (Average sunshine: 6.9h).

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Average sunshine days in December
Exmouth, Australia

Average sunshine days in December - Exmouth, Australia
  • Average sunshine days in December: 26.3 days

The month with the most sunshine days is October (29.4 days).
The month with the least sunshine days is February (20.6 days).

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Average UV index in December
Exmouth, Australia

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

The month with the highest UV index is February (UV index 8).
Months with the lowest UV index are May, June, July, August and September (UV index 6).

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Average cloud cover in December
Exmouth, Australia

Average cloud cover in December - Exmouth, Australia
  • Average cloud cover in December: 10

The month with the most cloud cover is June (Cloud cover 20).
The month with the least cloud cover is September (Cloud cover 5).

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Average visibility in December
Exmouth, Australia

Average visibility in December - Exmouth, 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).

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