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December Weather in Union, Philippines

Last updated: August 27, 2025

In December, the average temperature in Union, Philippines hovers around 27°C (81°F), with a comfortable range of 24°C (76°F) as the minimum and 29°C (85°F) at the maximum. However, be prepared for a wet season, as 276 mm (10.9 in) of precipitation falls over approximately 20 days, contributing to an average humidity level of 91%.

December Temperature in Union

In December in Union, the average temperature is 27°C (81°F). Maximum temperatures can reach 29°C (85°F), while minimums can drop to as low as 24°C (76°F). This pleasant climate makes it an ideal destination for travelers looking to enjoy warm weather and outdoor activities.

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 24°C (76°F).
JanFebMarAprMayJunJulAugSepOctNovDec808081818282828282828281
Data source: Temperature data for Union 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 Union

In Union in December, the precipitation amount is 276 mm (10.9 in) over the course of 20 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 276 mm (10.9 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec184947056114250248190222262176276
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Union

In Union in December, humidity is 91%. With an average temperature of 27°C (81°F), this humidity feels like a warm, thick haze wrapping around you, making travel feel sluggish and the air heavy, damp with the scent of earth and greenery, which can be both enchanting and exhausting.

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 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%80%77%78%85%87%88%89%90%87%90%91%
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.
JanFebMarAprMayJunJulAugSepOctNovDec121416161413131414131211
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.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)184 mm (7.2 inches)85%extreme
February Weather26°C (80°F)94 mm (3.7 inches)80%extreme
March Weather27°C (81°F)70 mm (2.8 inches)77%extreme
April Weather27°C (82°F)56 mm (2.2 inches)78%extreme
May Weather28°C (83°F)114 mm (4.5 inches)84%extreme
June Weather28°C (83°F)250 mm (9.8 inches)87%extreme
July Weather28°C (82°F)248 mm (9.8 inches)88%extreme
August Weather28°C (83°F)190 mm (7.5 inches)89%extreme
September Weather28°C (82°F)222 mm (8.7 inches)90%extreme
October Weather28°C (82°F)262 mm (10.3 inches)87%extreme
November Weather28°C (82°F)176 mm (6.9 inches)90%extreme
December Weather27°C (81°F)276 mm (10.9 inches)91%extreme

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