December Weather in Union, Philippines

Last updated: August 27, 2025

In December, the average temperature in Union, Philippines is a warm 27°C (81°F). You can expect a minimum temp of 25°C (77°F) and a maximum reaching 29°C (85°F). However, be prepared for some rain, as the region sees an average precipitation of 428 mm (16.9 in) over 29 days, accompanied by a high humidity level of 88%.

December Temperature in Union

In December in Union, the average temperature is 27°C (81°F). The maximum can reach 29°C (85°F), while the minimum can be as low as 25°C (77°F). This pleasant weather makes Union an ideal destination for travelers seeking warmth and sunshine.

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

The chart illustrates December temperature patterns in Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union, December typically has an average temperature of 27°C (81°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (77°F).

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

December Precipitation in Union

In Union in December, the total precipitation amount is 428 mm (16.9 in) spread over the course of 29 days.

December Precipitation Trends in Union

The chart displays monthly precipitation patterns in Union, 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 Union, December typically receives around 428 mm (16.9 inches) of precipitation spread over approximately 29 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 Union

In Union in December, humidity is 88%. With an average temperature of 27°C (81°F), this humidity feels like a warm, thick blanket wrapping around you as you travel, making every step feel more laborious and requiring frequent breaks to cool down and hydrate.

December Average Humidity in Union

This chart illustrates the average monthly humidity levels in Union, 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 Union is approximately 88%, 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 Union

In Union in December, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Union.

Maximum UV Index Levels in Union for December

The chart shows the monthly maximum UV Index (UVI) for Union 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 Union typically reaches 11, which falls under the extreme exposure category.

Data source: Union 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 Union Compares to Other Months

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

This table compares monthly weather conditions in Union, 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)	304 mm (12.0 inches)	90%	extreme
February Weather	26°C (80°F)	274 mm (10.8 inches)	90%	extreme
March Weather	27°C (80°F)	208 mm (8.2 inches)	90%	extreme
April Weather	27°C (81°F)	122 mm (4.8 inches)	88%	extreme
May Weather	28°C (82°F)	144 mm (5.7 inches)	83%	extreme
June Weather	28°C (83°F)	142 mm (5.6 inches)	81%	extreme
July Weather	28°C (83°F)	141 mm (5.5 inches)	80%	extreme
August Weather	28°C (83°F)	117 mm (4.6 inches)	81%	extreme
September Weather	28°C (83°F)	115 mm (4.5 inches)	84%	extreme
October Weather	28°C (82°F)	201 mm (7.9 inches)	81%	extreme
November Weather	27°C (81°F)	244 mm (9.6 inches)	84%	extreme
December Weather	27°C (81°F)	428 mm (16.9 inches)	88%	extreme