December weather forecast
Christchurch, New Zealand

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Weather in December

Closing the year, December marks the onset of summer in Christchurch. The weather becomes progressively warmer, although temperatures remain pleasant and comfortable. December resonates with longer days due to increasing daylight hours, reaching up to an average of 15.4 hours. Interestingly, despite being the peak summer month, December witnesses lower levels of humidity than the spring months. However, a significant increase in pressure to 1011.9 mb could be observed, hinting at stable and predictable weather conditions.

Temperature

Christchurch experiences a subtle adjustment in high-temperatures to a still enjoyable 19.6°C (67.3°F) with the onset of December, maintaining near parity with November's 17.2°C (63°F). An average temperature of 10.2°C (50.4°F) is recorded during the nights in December.

Humidity

The average relative humidity in December is 74%.

Rainfall

In Christchurch, New Zealand, in December, it is raining for 10.2 days, with typically 27mm (1.06") of accumulated precipitation. In Christchurch, during the entire year, the rain falls for 114.3 days and collects up to 300mm (11.81") of precipitation.

Snowfall

In Christchurch, New Zealand, snow does not fall in January through May, October through December.

Sea temperature

In Christchurch, the average seawater temperature in December is 14.3°C (57.7°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

December has the longest days of the year, with an average of 15h and 24min of daylight.
On the first day of December, sunrise is at 5:43 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 9:13 pm NZDT.

Sunshine

With an average of 10.4h of sunshine, December has the most sunshine of the year in Christchurch.

UV index

The average daily maximum UV index in December in Christchurch is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 4 during December leads to these advisories:
Take necessary precautions - Suggestions to elude sunburn are provided. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

What is the usual temperature for Christchurch in December?

The high-temperature in Christchurch during December is 19.6°C (67.3°F) and the low-temperature is 10.2°C (50.4°F).

What is the average humidity in December in Christchurch?

The average relative humidity in December in Christchurch is 74%.

How much does it rain in Christchurch in December?

In Christchurch, in December, during 10.2 rainfall days, 27mm (1.06") of precipitation is typically accumulated.

When it does not snow in Christchurch?

In Christchurch, New Zealand, snow does not fall in January through May, October through December.

What is the sea water temperature in December in Christchurch?

In Christchurch, the average seawater temperature in December is 14.3°C (57.7°F). Swimming in 14.3°C (57.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Christchurch?

With an average of 15h and 24min of daylight, December has the longest days of the year in Christchurch.

How many hours of daylight does Christchurch have in December?

In December, the average day length in Christchurch is 15h and 22min.

When are sunrise and sunset in December in Christchurch?

On the first day of December in Christchurch, sunrise is at 5:43 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 9:13 pm NZDT.

What month has the most sunshine in Christchurch?

With an average of 10.4h of sunshine, December has the most sunshine of the year in Christchurch.

How long on average sun shines in December in Christchurch?

The average sunshine duration in December is 10.4h.

What is the UV index intensity in December in Christchurch?

In Christchurch, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
Christchurch, New Zealand

Average temperature in December - Christchurch, New Zealand
  • Average high temperature in December: 19.6°C

The warmest month (with the highest average high temperature) is January (21.3°C).
The month with the lowest average high temperature is July (10.3°C).

  • Average low temperature in December: 10.2°C

The month with the highest average low temperature is January (11.9°C).
The coldest month (with the lowest average low temperature) is July (3.8°C).

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Average pressure in December
Christchurch, New Zealand

Average pressure in December - Christchurch, New Zealand
  • Average pressure in December: 1011.9mbar

The month with the highest atmospheric pressure is March (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).

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Average wind speed in December
Christchurch, New Zealand

Average wind speed in December - Christchurch, New Zealand
  • Average wind speed in December: 14.7km/h

The windiest month (with the highest average wind speed) is January (15.3km/h).
The calmest month (with the lowest average wind speed) is August (12.4km/h).

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Average humidity in December
Christchurch, New Zealand

Average humidity in December - Christchurch, New Zealand
  • Average humidity in December: 74%

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is January (70%).

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Average rainfall in December
Christchurch, New Zealand

Average rainfall in December - Christchurch, New Zealand
  • Average rainfall in December: 27mm

The wettest month (with the highest rainfall) is October (38mm).
The driest month (with the least rainfall) is September (14mm).

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Average rainfall days in December
Christchurch, New Zealand

Average rainfall days in December - Christchurch, New Zealand
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is October (12.5 days).
The month with the least rainy days is May (8 days).

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Average snowfall in December
Christchurch, New Zealand

Average snowfall in December - Christchurch, New Zealand
  • Average snowfall in December: 0mm

The month with the highest snowfall is August (5mm).
The months with the least snowfall are January, February, March, April, May, October, November and December (0mm).

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Average snowfall days in December
Christchurch, New Zealand

Average snowfall days in December - Christchurch, New Zealand
  • Average snowfall days in December: 0 days

The months with the highest number of snowfall days are June and August (0.3 days).
The months with the least snowfall days are January, February, March, April, October, November and December (0 days).

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Average sea temperature in December
Christchurch, New Zealand

Average sea temperature in December - Christchurch, New Zealand
  • Average sea temperature in December: 14.3°C

The best month for swimming (with the highest average sea temperature) is February (16.1°C).
The coldest month (with the lowest average sea temperature) is August (9.5°C).

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

Average daylight in December / Average sunshine in December - Christchurch, New Zealand
  • Average daylight in December: 15h and 2min

The month with the longest days is December (Average daylight: 15h and 24min).
The month with the shortest days is June (Average daylight: 9h and 0min).

  • Average sunshine in December: 10h and 2min

The month with the most sunshine is December (Average sunshine: 10h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 6min).

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Average sunshine days in December
Christchurch, New Zealand

Average sunshine days in December - Christchurch, New Zealand
  • Average sunshine days in December: 18.3 days

The month with the most sunshine days is May (21.2 days).
The month with the least sunshine days is November (17.3 days).

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Average UV index in December
Christchurch, New Zealand

Average UV index in December - Christchurch, New Zealand
  • Average UV index in December: 4

The month with the highest UV index is January (UV index 5).
The months with the lowest UV index are April, May, June, July, August and September (UV index 3).

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Average cloud cover in December
Christchurch, New Zealand

Average cloud cover in December - Christchurch, New Zealand
  • Average cloud cover in December: 40

The month with the most cloud cover is June (Cloud cover 43).
The months with the least cloud cover are January, February, March and May (Cloud cover 37).

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Average visibility in December
Christchurch, New Zealand

Average visibility in December - Christchurch, New Zealand
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, June, July and December (10km).
The months with the lowest visibility are May, August, September, October and November (9km).

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Christchurch, New Zealand

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