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December Weather in Eltham, New Zealand

Last updated: August 31, 2025

In December, the average temperature in Eltham, New Zealand hovers around 17°C (63°F), making it a pleasant time to visit. Expect minimum temperatures to drop to 6°C (44°F) and highs reaching up to 24°C (76°F). With an average precipitation of 137 mm (5.4 in) over 15 days, you might want to pack an umbrella. Moreover, enjoy the rich atmosphere with an average humidity of 80%!

December Temperature in Eltham

In December, in Eltham, the average temperature is 17°C (63°F). The maximum can reach 24°C (76°F), while the minimum can be as low as 6°C (44°F). This climate makes Eltham an ideal destination for travelers looking to enjoy mild weather and pleasant outdoor activities.

December Weather in Eltham: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Eltham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eltham, December typically has an average temperature of 17°C (63°F), with highs reaching up to 24°C (76°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec646562585451505052555963
Data source: Temperature data for Eltham generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Eltham

In Eltham in December, the precipitation amount is 137 mm (5.4 in) over the course of 15 days.

December Precipitation Trends in Eltham

The chart displays monthly precipitation patterns in Eltham, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Eltham, December typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec71651061491009514413213410297137
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Eltham

In Eltham in December humidity is 80%. With an average temperature of 17°C (63°F), this humidity feels like you're walking through a thick, warm blanket, making travel feel slightly stifling and requiring frequent breaks to stay comfortable.

December Average Humidity in Eltham

This chart illustrates the average monthly humidity levels in Eltham, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Eltham is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%77%75%76%81%83%84%81%80%82%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Eltham

In Eltham in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Eltham.

Maximum UV Index Levels in Eltham for December

The chart shows the monthly maximum UV Index (UVI) for Eltham in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Eltham typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1413974234691113
Data source: Eltham December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Eltham Compares to Other Months

Weather in Eltham varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Eltham, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Eltham, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)71 mm (2.8 inches)79%extreme
February Weather18°C (65°F)65 mm (2.5 inches)77%extreme
March Weather17°C (62°F)106 mm (4.2 inches)75%very high
April Weather14°C (58°F)149 mm (5.9 inches)76%high
May Weather12°C (55°F)100 mm (3.9 inches)81%moderate
June Weather10°C (51°F)94 mm (3.7 inches)83%low
July Weather10°C (50°F)144 mm (5.7 inches)84%moderate
August Weather10°C (50°F)132 mm (5.2 inches)81%moderate
September Weather11°C (52°F)134 mm (5.3 inches)80%high
October Weather13°C (55°F)102 mm (4.0 inches)82%very high
November Weather15°C (59°F)97 mm (3.8 inches)82%extreme
December Weather17°C (63°F)137 mm (5.4 inches)80%extreme

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