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December Weather in Wellington, United States

Last updated: June 24, 2025

In December, the average temperature in Wellington, United States hovers around -3°C (27°F). This chilly season can see extremes, with minimum temperatures plunging to -22°C (-7°F) and a maximum reaching a mild 15°C (59°F). Expect some precipitation, averaging 24 mm (0.9 in) over 5 days, and be prepared for a high humidity level of around 87%.

December Temperature in Wellington

In December in Wellington, the average temperature is -3°C (27°F). Maximums can reach 15°C (59°F), while minimums can drop as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for comfort.

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 -3°C (27°F), with highs reaching up to 15°C (59°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec242940495871777565483827
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 24 mm (0.9 in) over the course of 5 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 24 mm (0.9 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec2627311123891212201824
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 87%. With an average temperature of -3°C (27°F), this humidity feels like an icy blanket that wraps around you, making outdoor activities challenging as the cold air mingles with the dampness, leaving travelers feeling chilled to the bone even in short bursts outside.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%77%70%54%45%37%34%47%67%82%87%
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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Wellington, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
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 Weather-5°C (24°F)26 mm (1.0 inches)87%moderate
February Weather-2°C (30°F)27 mm (1.0 inches)88%high
March Weather5°C (41°F)31 mm (1.2 inches)77%very high
April Weather9°C (49°F)11 mm (0.4 inches)69%very high
May Weather14°C (58°F)23 mm (0.9 inches)54%extreme
June Weather22°C (71°F)8 mm (0.3 inches)45%extreme
July Weather25°C (78°F)9 mm (0.4 inches)37%extreme
August Weather24°C (75°F)12 mm (0.5 inches)34%extreme
September Weather19°C (66°F)12 mm (0.5 inches)47%very high
October Weather9°C (48°F)20 mm (0.8 inches)67%high
November Weather3°C (39°F)18 mm (0.7 inches)82%moderate
December Weather-3°C (27°F)24 mm (0.9 inches)87%moderate

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