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December Weather in Boston, Philippines

Last updated: August 27, 2025

In Boston, Philippines, the average temperature in December is a warm 25°C (77°F). Expect pleasant days with temperatures ranging from a minimum of 21°C (69°F) to a maximum of 31°C (87°F). However, be prepared for significant rainfall, with an average precipitation amount of 318 mm (12.5 in) spread over 27 days. The average humidity during this time is a high 87%, adding to the tropical feel of your visit.

December Temperature in Boston

In December, in Boston, the average temperature is 25°C (77°F). Maximums can reach 31°C (87°F) and minimums can be as low as 21°C (69°F). This pleasant climate makes Boston an ideal destination for travelers seeking comfortable temperatures and enjoyable outdoor activities.

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

The chart illustrates December temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boston, December typically has an average temperature of 25°C (77°F), with highs reaching up to 31°C (87°F) and lows dropping to around 21°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec767576777979797979787877
Data source: Temperature data for Boston 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 Boston

In Boston in December, the total precipitation amount is 318 mm (12.5 in) spread over 27 days.

December Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, 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 Boston, December typically receives around 318 mm (12.5 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec470423264159265363355317368397276318
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Boston

In Boston in December, humidity is 87%. With an average temperature of 25°C (77°F), this humidity feels like a thick, warm blanket enveloping you, making travel a challenge as sweat clings to your skin and the air feels heavy and stifling.

December Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, 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 Boston is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%91%87%84%83%82%83%85%82%84%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Boston

In Boston in December, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Boston.

Maximum UV Index Levels in Boston for December

The chart shows the monthly maximum UV Index (UVI) for Boston 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 Boston typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516161514141515141312
Data source: Boston 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 Boston Compares to Other Months

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

This table compares monthly weather conditions in Boston, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)470 mm (18.5 inches)90%extreme
February Weather24°C (76°F)423 mm (16.6 inches)92%extreme
March Weather25°C (76°F)264 mm (10.4 inches)90%extreme
April Weather25°C (78°F)159 mm (6.3 inches)87%extreme
May Weather26°C (79°F)265 mm (10.4 inches)83%extreme
June Weather26°C (79°F)363 mm (14.3 inches)83%extreme
July Weather26°C (79°F)355 mm (14.0 inches)82%extreme
August Weather26°C (79°F)317 mm (12.5 inches)83%extreme
September Weather26°C (79°F)368 mm (14.5 inches)85%extreme
October Weather26°C (79°F)397 mm (15.6 inches)82%extreme
November Weather25°C (78°F)276 mm (10.8 inches)83%extreme
December Weather25°C (77°F)318 mm (12.5 inches)87%extreme

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