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December Weather in Wellington, United States

Last updated: June 24, 2025

The average temperature in Wellington, United States during December is a pleasant 21°C (70°F). Expect a minimum of 7°C (45°F) and a maximum of 31°C (87°F), providing a diverse range for various activities. With an average precipitation of 37 mm (1.5 in) over about 7 days, and a relatively high humidity level of 84%, you might want to pack accordingly!

December Temperature in Wellington

In December in Wellington, the average temperature is 21°C (70°F). Maximum temperatures can reach 31°C (87°F), while minimums can dip as low as 7°C (45°F). This pleasant climate makes it an ideal destination for travelers seeking both warmth and cooler evenings.

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

The chart illustrates December temperature patterns in Wellington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wellington, December typically has an average temperature of 21°C (70°F), with highs reaching up to 31°C (87°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec687272767981838382807470
Data source: Temperature data for Wellington 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 Wellington

In Wellington in December, the precipitation amount is 37 mm (1.5 in) during a span of 7 days.

December Precipitation Trends in Wellington

The chart displays monthly precipitation patterns in Wellington, 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 Wellington, December typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec344828761652572542502011356537
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Wellington

In Wellington in December, humidity is 84%. With an average temperature of 21°C (70°F), this humidity feels like thick, warm air wrapping around you, making outdoor activities quite uncomfortable and necessitating frequent hydration breaks for a more enjoyable travel experience.

December Average Humidity in Wellington

This chart illustrates the average monthly humidity levels in Wellington, 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 Wellington is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%68%65%73%77%80%83%83%83%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Wellington

In Wellington in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Wellington.

Maximum UV Index Levels in Wellington for December

The chart shows the monthly maximum UV Index (UVI) for Wellington 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 Wellington typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101212121212111075
Data source: Wellington 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 Wellington Compares to Other Months

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

This table compares monthly weather conditions in Wellington, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)34 mm (1.3 inches)83%high
February Weather22°C (72°F)48 mm (1.9 inches)80%very high
March Weather22°C (72°F)28 mm (1.1 inches)75%very high
April Weather24°C (76°F)75 mm (3.0 inches)68%extreme
May Weather26°C (79°F)165 mm (6.5 inches)65%extreme
June Weather27°C (82°F)257 mm (10.1 inches)73%extreme
July Weather28°C (83°F)254 mm (10.0 inches)77%extreme
August Weather28°C (83°F)250 mm (9.8 inches)80%extreme
September Weather28°C (83°F)201 mm (7.9 inches)83%extreme
October Weather27°C (80°F)135 mm (5.3 inches)83%very high
November Weather24°C (75°F)65 mm (2.6 inches)83%high
December Weather21°C (70°F)37 mm (1.5 inches)84%moderate

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