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December Weather in Blue Hills, United States

Last updated: June 24, 2025

The average temperature in Blue Hills, United States during December is a chilly 1°C (34°F). Expect minimums plunging to -21°C (-6°F) and maxing out at a mild 17°C (63°F). With an average precipitation of 120 mm (4.7 in) over about 10 days, it's wise to pack an umbrella. You'll also encounter a high average humidity of 80%, making for a damp and cool atmosphere.

December Temperature in Blue Hills

In December in Blue Hills, the average temperature is 1°C (34°F). The maximum can reach 17°C (63°F) and the minimum can be as low as -21°C (-6°F). Be prepared for a wide temperature range when traveling, so pack accordingly!

December Weather in Blue Hills: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Blue Hills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Blue Hills, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (63°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec303339496069757366564234
Data source: Temperature data for Blue Hills 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 Blue Hills

In Blue Hills in December, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.

December Precipitation Trends in Blue Hills

The chart displays monthly precipitation patterns in Blue Hills, 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 Blue Hills, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec678688126113841479010213490120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Blue Hills

In Blue Hills in December, humidity is 80%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill that seeps through your layers, making outdoor activities uncomfortable and potentially discouraging for travelers.

December Average Humidity in Blue Hills

This chart illustrates the average monthly humidity levels in Blue Hills, 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 Blue Hills is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Blue Hills

In Blue Hills in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Blue Hills, you can visit Hourly UV Index in Blue Hills.

Maximum UV Index Levels in Blue Hills for December

The chart shows the monthly maximum UV Index (UVI) for Blue Hills 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 Blue Hills typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Blue Hills 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 Blue Hills Compares to Other Months

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

This table compares monthly weather conditions in Blue Hills, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)67 mm (2.6 inches)84%moderate
February Weather1°C (33°F)86 mm (3.4 inches)82%moderate
March Weather4°C (39°F)88 mm (3.5 inches)81%high
April Weather9°C (49°F)126 mm (5.0 inches)78%very high
May Weather15°C (60°F)113 mm (4.4 inches)69%very high
June Weather21°C (69°F)84 mm (3.3 inches)69%very high
July Weather24°C (75°F)147 mm (5.8 inches)62%very high
August Weather23°C (74°F)90 mm (3.5 inches)65%very high
September Weather19°C (67°F)102 mm (4.0 inches)68%very high
October Weather13°C (57°F)134 mm (5.3 inches)74%high
November Weather6°C (43°F)90 mm (3.5 inches)82%moderate
December Weather1°C (34°F)120 mm (4.7 inches)80%low

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