December Weather in Wellington, United States

Last updated: June 24, 2025

In Wellington, United States, the average temperature in December hovers around 7°C (44°F), with a range that can dip to a chilly -8°C (17°F) or rise to a warm 29°C (85°F). Expect 22 mm (0.9 in) of precipitation over 2 days, and an average humidity of 81%, creating a moist atmosphere that might leave you feeling cozy yet invigorated.

December Temperature in Wellington

In December in Wellington, the average temperature is 7°C (44°F). Maximum temperatures can reach 29°C (85°F), while the minimum can drop as low as -8°C (17°F). Be sure to pack layered clothing to accommodate the wide range of temperatures during your travels.

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 7°C (44°F), with highs reaching up to 29°C (85°F) and lows dropping to around -8°C (17°F).

Data source: Temperature data for Wellington generated using information from the Copernicus Climate Change Service.

December Precipitation in Wellington

In Wellington in December, the precipitation amount is 22 mm (0.9 in) over a span of 2 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 22 mm (0.9 inches) of precipitation spread over approximately 2 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Wellington

In Wellington in December humidity is 81%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress warmly while exploring.

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 81%, offering insight into how humid the weather typically is during this month.

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 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Wellington for better planning.

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 4, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (40°F)	27 mm (1.1 inches)	75%	moderate
February Weather	5°C (42°F)	18 mm (0.7 inches)	76%	high
March Weather	12°C (54°F)	70 mm (2.7 inches)	64%	very high
April Weather	16°C (61°F)	42 mm (1.6 inches)	70%	very high
May Weather	21°C (71°F)	92 mm (3.6 inches)	78%	extreme
June Weather	26°C (80°F)	88 mm (3.5 inches)	81%	extreme
July Weather	28°C (83°F)	31 mm (1.2 inches)	82%	extreme
August Weather	28°C (82°F)	35 mm (1.4 inches)	78%	extreme
September Weather	24°C (75°F)	74 mm (2.9 inches)	72%	very high
October Weather	16°C (62°F)	70 mm (2.8 inches)	73%	high
November Weather	10°C (51°F)	16 mm (0.6 inches)	80%	moderate
December Weather	7°C (44°F)	22 mm (0.9 inches)	81%	moderate