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December Weather in Riverhead, New Zealand

Last updated: August 31, 2025

In December, the average temperature in Riverhead, New Zealand hovers around 19°C (66°F). Expect a comfortable range with minimums dipping to 13°C (55°F) and maximums reaching up to 24°C (76°F). With 71 mm (2.8 in) of precipitation spread over 11 days, you might want to keep an umbrella handy. The air carries a 78% humidity, adding a touch of warmth to your stay.

December Temperature in Riverhead

In December in Riverhead, the average temperature is 19°C (66°F). Maximums can reach 24°C (76°F), and minimums can be as low as 13°C (55°F). This pleasant climate makes Riverhead an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates December temperature patterns in Riverhead, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverhead, December typically has an average temperature of 19°C (66°F), with highs reaching up to 24°C (76°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec686967646057555556596266
Data source: Temperature data for Riverhead 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 Riverhead

In Riverhead in December, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.

December Precipitation Trends in Riverhead

The chart displays monthly precipitation patterns in Riverhead, 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 Riverhead, December typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec55758510495111120130116858071
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Riverhead

In Riverhead in December, humidity is 78%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making traveling quite uncomfortable unless you're well-prepared with lightweight, breathable clothing and frequent breaks to stay hydrated.

December Average Humidity in Riverhead

This chart illustrates the average monthly humidity levels in Riverhead, 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 Riverhead is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%76%74%75%80%82%83%81%80%80%80%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riverhead

In Riverhead 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 Riverhead.

Maximum UV Index Levels in Riverhead for December

The chart shows the monthly maximum UV Index (UVI) for Riverhead 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 Riverhead typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141410743357101113
Data source: Riverhead 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 Riverhead Compares to Other Months

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

This table compares monthly weather conditions in Riverhead, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)55 mm (2.2 inches)79%extreme
February Weather21°C (69°F)75 mm (2.9 inches)76%extreme
March Weather20°C (67°F)85 mm (3.3 inches)74%very high
April Weather18°C (64°F)104 mm (4.1 inches)74%high
May Weather15°C (60°F)95 mm (3.7 inches)80%moderate
June Weather14°C (57°F)111 mm (4.4 inches)82%moderate
July Weather13°C (55°F)120 mm (4.7 inches)83%moderate
August Weather13°C (55°F)130 mm (5.1 inches)80%moderate
September Weather13°C (56°F)116 mm (4.6 inches)80%high
October Weather15°C (59°F)85 mm (3.4 inches)80%very high
November Weather17°C (62°F)80 mm (3.2 inches)80%extreme
December Weather19°C (66°F)71 mm (2.8 inches)78%extreme

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