December weather forecast
New Plymouth, New Zealand

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Weather in December

December marks the pinnacle of summer's arrival with average temperatures peaking at 19.9°C (67.8°F). New Plymouth transitions into longer, hotter days, concluding the year on a warm note. A slight increase in rainfall is observed but overall, dry conditions prevail. Sea temperatures sees a rise, signaling an ideal time for beach outings and water activities. Long, sunny days combined with warm temperatures and moderate humidity, highlights New Plymouth's splendid summer charm.

Temperature

With December's arrival, New Plymouth's weather records an average high-temperature of a still comfortable 19.9°C (67.8°F), marking little difference from November's 18.1°C (64.6°F). In New Plymouth, an average low-temperature of 12.7°C (54.9°F) is recorded during December nights.

Humidity

In New Plymouth, the average relative humidity in December is 81.4%.

Rainfall

In New Plymouth, in December, during 9.5 rainfall days, 113mm (4.45") of precipitation is typically accumulated. Throughout the year, there are 134.8 rainfall days, and 1386mm (54.57") of precipitation is accumulated.

Sea temperature

In New Plymouth, the average seawater temperature in December is 17°C (62.6°F).
Note: Swimming in 17°C (62.6°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).

Daylight

December has the longest days of the year in New Plymouth, with an average of 14h and 54min of daylight.
On the first day of the month, sunrise is at 5:51 am and sunset at 8:33 pm. On the last day of December, sunrise is at 6:00 am and sunset at 8:52 pm NZDT.

Sunshine

The average sunshine in December is 6.8h.

UV index

January and December, with an average maximum UV index of 11, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index, 11 in December, converts into the following recommendations:
Carry out every crucial safety measure. People with fair skin may sustain burns in fewer than 5 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Frequently asked questions

What are December temperatures?

December temperatures vary between a high-temperature of 19.9°C (67.8°F) and a low-temperature of 12.7°C (54.9°F).

What is the average humidity in December?

In New Plymouth, the average relative humidity in December is 81.4%.

How much does it rain in December?

In New Plymouth, in December, it is raining for 9.5 days, with typically 113mm (4.45") of accumulated precipitation.

What is the sea temperature in December in New Plymouth?

In New Plymouth, New Zealand, the average seawater temperature in December is 17°C (62.6°F). For most, swimming in 17°C (62.6°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?

December has the longest days of the year, with an average of 14h and 54min of daylight.

How many hours of daylight does New Plymouth have in December?

The average day length in December is 14h and 52min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 5:51 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 8:52 pm NZDT.

How long on average sun shines in December?

In New Plymouth, New Zealand, the average sunshine duration in December is 6.8h.

What are the months with the highest UV index?

The months with the highest UV index are January and December, with an average maximum UV index of 11.

What is the UV index reading in December?

The average daily maximum UV index in December is 11. A UV Index value of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
New Plymouth, New Zealand

Average temperature in December - New Plymouth, New Zealand
  • Average high temperature in December: 19.9°C

The warmest month (with the highest average high temperature) is February (22.1°C).
The month with the lowest average high temperature is July (13.3°C).

  • Average low temperature in December: 12.7°C

The month with the highest average low temperature is February (13.9°C).
The coldest month (with the lowest average low temperature) is July (5.8°C).

Average humidity in December
New Plymouth, New Zealand

Average humidity in December - New Plymouth, New Zealand
  • Average humidity in December: 81.4%

The month with the highest relative humidity is June (86.1%).
The month with the lowest relative humidity is November (80.1%).

Average rainfall in December
New Plymouth, New Zealand

Average rainfall in December - New Plymouth, New Zealand
  • Average rainfall in December: 113.1mm

The wettest month (with the highest rainfall) is June (152.6mm).
The driest month (with the least rainfall) is February (85.4mm).

Average rainfall days in December
New Plymouth, New Zealand

Average rainfall days in December - New Plymouth, New Zealand
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is October (14.1 days).
The month with the least rainy days is February (7.7 days).

Average sea temperature in December
New Plymouth, New Zealand

Average sea temperature in December - New Plymouth, New Zealand
  • Average sea temperature in December: 17°C

The best months for swimming (with the highest average sea temperature) are February and March (19°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (14°C).

Average daylight in December /
Average sunshine in December
New Plymouth, New Zealand

Average daylight in December / Average sunshine in December - New Plymouth, New Zealand
  • Average daylight in December: 14h and 5min

The month with the longest days is December (Average daylight: 14h and 54min).
The month with the shortest days is June (Average daylight: 9h and 30min).

  • Average sunshine in December: 6h and 5min

The months with the most sunshine are January and February (Average sunshine: 8h and 0min).
The month with the least sunshine is June (Average sunshine: 3h and 54min).

Average UV index in December
New Plymouth, New Zealand

Average UV index in December - New Plymouth, New Zealand
  • Average UV index in December: 11

The months with the highest UV index are January and December (UV index 11).
The months with the lowest UV index are May, June and July (UV index 2).

New Plymouth, New Zealand

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