Wellington
New Zealand
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Wellington, New Zealand

A red cable bus on the road in Wellington, New Zealand, with the view of the sea, mountains, and the city in the distance
A red cable bus on the road in Wellington, New Zealand, with the view of the sea, mountains, and the city in the distance
December, the first month of the summer, in Wellington, is also an enjoyable month, with temperature in the range of an average low of 12°C (53.6°F) and an average high of 18.6°C (65.5°F).

Temperature

In December, the average high-temperature is practically the same as in November - a still enjoyable 18.6°C (65.5°F). In December, the average low-temperature is 12°C (53.6°F).

Humidity

In Wellington, the average relative humidity in December is 79.7%.

Rainfall

In Wellington, New Zealand, in December, during 9 rainfall days, 93.5mm (3.7") of precipitation is typically accumulated. In Wellington, during the entire year, the rain falls for 124 days and collects up to 1243.6mm (49") of precipitation.

Sea temperature

In Wellington, New Zealand, the average seawater temperature is 15.8°C (60.4°F).
Note: For swimming, a surface water temperature of 15.8°C (60.4°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).

Daylight

December has the longest days of the year, with an average of 15.1h of daylight.

Sunshine

In Wellington, the average sunshine is 7.2h.

UV index

The average daily maximum UV index in December is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. 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 Wellington?

In December, in Wellington, the average high-temperature is 18.6°C (65.5°F), and the average low-temperature is 12°C (53.6°F).

What is the average humidity in December in Wellington?

The average relative humidity in December in Wellington, New Zealand, is 79.7%.

How many days does it rain in December in Wellington?

In Wellington, New Zealand, during December, the rain falls for 9 days and regularly aggregates up to 93.5mm (3.7") of precipitation.

How cold is the water in December in Wellington?

In December, the average sea temperature is 15.8°C (60.4°F). For most, swimming in 15.8°C (60.4°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 Wellington?

December has the longest days of the year in Wellington, with an average of 15.1h of daylight.

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

The average length of the day in December in Wellington, New Zealand, is 15.1h.

How many hours of sunshine does Wellington have in December?

In December, the average sunshine in Wellington is 7.2h.

How high is the UV index in December in Wellington?

In December, the average daily maximum UV index in Wellington, New Zealand, is 10. A UV Index reading of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Wellington, New Zealand
  • Average high temperature in December: 18.6°C

The warmest month (with the highest average high temperature) is February (20.3°C).
The month with the lowest average high temperature is July (11.1°C).

  • Average low temperature in December: 12°C

The month with the highest average low temperature is February (13.3°C).
The coldest month (with the lowest average low temperature) is July (5.9°C).

Average humidity in December - Wellington, New Zealand
  • Average humidity in December: 79.7%

The month with the highest relative humidity is July (86.1%).
The month with the lowest relative humidity is November (78.9%).

Average rainfall in December - Wellington, New Zealand
  • Average rainfall in December: 93.5mm

The wettest month (with the highest rainfall) is July (136.4mm).
The driest month (with the lowest rainfall) is February (76.9mm).

Average rainfall days in December - Wellington, New Zealand
  • Average rainfall days in December: 9 days

Months with the highest number of rainy days are June and July (13.3 days).
The month with the lowest number of rainy days is February (7 days).

Average sea temperature in December - Wellington, New Zealand
  • Average sea temperature in December: 15.8°C

The best month for swimming (with the highest average sea temperature) is February (17.1°C).
The coldest month (with the lowest average sea temperature) is August (12.3°C).

Average daylight in December / Average sunshine in December - Wellington, New Zealand
  • Average daylight in December: 15.1h

The month with the longest days is December (Average daylight: 15.1h).
The month with shortest days is June (Average daylight: 9.2h).

  • Average sunshine in December: 7.2h

The month with most sunshine is January (Average sunshine: 7.8h).
The month with least sunshine is June (Average sunshine: 3.4h).

Average UV index in December - Wellington, New Zealand
  • Average UV index in December: 10

The month with the highest UV index is January (UV index 11).
Months with the lowest UV index are June and July (UV index 1).