December Weather in Koumac, New Caledonia

Last updated: August 31, 2025

In December, the average temperature in Koumac, New Caledonia hovers around 26°C (79°F), with a minimum of 22°C (71°F) and a maximum reaching up to 31°C (88°F). Expect 148 mm (5.8 in) of precipitation spread over 20 days, and prepare for a high average humidity of 80%.

December Temperature in Koumac

In December in Koumac, the average temperature is 26°C (79°F). Maximums can reach 31°C (88°F), while minimums can drop to as low as 22°C (71°F). This pleasant weather makes Koumac an ideal destination for travelers seeking warmth and comfort during their visit.

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

The chart illustrates December temperature patterns in Koumac, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koumac, December typically has an average temperature of 26°C (79°F), with highs reaching up to 31°C (88°F) and lows dropping to around 22°C (71°F).

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

December Precipitation in Koumac

In Koumac in December, the total precipitation amount is 148 mm (5.8 in) spread over 20 days.

December Precipitation Trends in Koumac

The chart displays monthly precipitation patterns in Koumac, 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 Koumac, December typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 20 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 Koumac

In Koumac in December humidity is 80%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket, making outdoor activities feel sticky and exhausting, potentially dampening the travel experience and necessitating frequent breaks to cool down and hydrate.

December Average Humidity in Koumac

This chart illustrates the average monthly humidity levels in Koumac, 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 Koumac is approximately 80%, 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 Koumac

In Koumac in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Koumac.

Maximum UV Index Levels in Koumac for December

The chart shows the monthly maximum UV Index (UVI) for Koumac 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 Koumac typically reaches 15, which falls under the extreme exposure category.

Data source: Koumac 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 Koumac Compares to Other Months

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

This table compares monthly weather conditions in Koumac, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (80°F)	174 mm (6.9 inches)	81%	extreme
February Weather	27°C (80°F)	183 mm (7.2 inches)	81%	extreme
March Weather	26°C (80°F)	121 mm (4.7 inches)	81%	extreme
April Weather	25°C (78°F)	104 mm (4.1 inches)	82%	extreme
May Weather	24°C (75°F)	49 mm (1.9 inches)	79%	very high
June Weather	22°C (72°F)	30 mm (1.2 inches)	74%	high
July Weather	21°C (71°F)	54 mm (2.1 inches)	71%	very high
August Weather	21°C (71°F)	53 mm (2.1 inches)	74%	very high
September Weather	22°C (72°F)	16 mm (0.6 inches)	73%	extreme
October Weather	24°C (75°F)	61 mm (2.4 inches)	75%	extreme
November Weather	25°C (77°F)	40 mm (1.6 inches)	79%	extreme
December Weather	26°C (79°F)	148 mm (5.8 inches)	80%	extreme