December weather forecast
Chatham Islands, New Zealand

December marks the advent of summer, bringing with it an upswing in the island's temperature readings. As the year comes to a close, there are showers expected intermittently, with recorded average rainfall of around 66mm (2.6"). Evon as the overall humidity undergoes a bit of a dip, days continue to extend their hours, with as ample daylight hours as the summer peak. With longer sunshine hours, the UV index leaps to an annual high, making sun protection a must-have. Celebrating the close of the year, the sea temperature climbs up, rounding off the season’s splendid seaside experiences.

Temperature

The shift to December signals an average high-temperature of a still refreshing 16.4°C (61.5°F), subtly varied from November's 14.4°C (57.9°F). In December, the recorded average low-temperature in Chatham Islands is a cool 10.7°C (51.3°F).

Humidity

The average relative humidity in December in Chatham Islands, New Zealand, is 82.7%.

Rainfall

In December, in Chatham Islands, the rain falls for 9.4 days. Throughout December, 66mm (2.6") of precipitation is accumulated. Throughout the year, in Chatham Islands, there are 140 rainfall days, and 912mm (35.91") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature is 15°C (59°F).
Note: A surface water temperature of 15°C (59°F) does not provide an enjoyable swimming experience for most. Breathing control becomes more challenging as the water temperature drops below 21°C (69.8°F).

Daylight

With an average of 15h and 24min of daylight, December has the longest days of the year in Chatham Islands.
On the first day of the month, sunrise is at 5:43 am and sunset at 8:57 pm. On the last day of December, in Chatham Islands, sunrise is at 5:52 am and sunset at 9:16 pm +1345.

Sunshine

In December, the average sunshine in Chatham Islands, New Zealand, is 5.3h.

UV index

January and December, with an average maximum UV index of 10, are months with the highest UV index. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average UV index of 10 in December transforms into this advice:
Without adequate protection, skin and eyes might suffer damage. Ensure precautions are in place. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.