Last updated: March 17, 2025
December in Boston, United Kingdom, is characterized by a chill in the air and frequent rainfall, making it a quintessential winter month. Average temperatures hover around 6°C (43°F), with maxima reaching 15°C (59°F) and minima dipping to a brisk -2°C (29°F). The month witnesses about 72 mm (2.8 in) of precipitation spread over 15 days, contributing to an often humid atmosphere with levels around 88%. Those venturing out should prepare for the typical British weather, balancing mild daytime warmth against the cold and dampness that can linger through the season.
In December, Boston, United Kingdom experiences a notable shift as winter settles in, with temperatures marking a transition from the milder autumn months. The minimum temperature hovers around -2°C (29°F), while the average rests at a chilly 6°C (43°F). Although the temperature can rise to a maximum of 15°C (59°F), the daytime warmth often gives way to brisk, frosty evenings, indicating the chill of the season. This trend highlights a gradual cooling from the milder temperatures of the preceding months. As Boston embraces the winter spirit, residents can expect a blend of crisp days and cold nights, perfect for cozy gatherings and festive celebrations.
December in Boston, United Kingdom, brings notable precipitation, with an average of 72 mm (2.8 in) of rain spread across approximately 15 days. This marks a significant uptick in both rainfall and rainy days compared to the preceding months, highlighting a transition into winter weather patterns. The increase from November's 54 mm (2.1 in) suggests that December often closes the year with a moist, drizzly atmosphere, setting the tone for the colder months ahead. This trend of growing precipitation is consistent with the year’s peak in August, where the rains begin to taper off, leading to December's wetter finale, making it a month of cozy indoor activities amidst the brisk climate.
In Boston, United Kingdom, December brings a relative humidity of 88%, maintaining a trend observed throughout the late autumn months. As the year winds down, humidity levels remain high, slightly below the 89% recorded in November and the peak of 90% in January. Generally, the colder months showcase a gradual decline from the spring and summer averages, which hover around the 83% mark, emphasizing a pattern of increased dampness as the weather cools. This consistent humidity can create a cozy atmosphere during the festive season, appealing to those who cherish the charm of a wet winter.
In Boston, United Kingdom, the UV Index experiences a significant decline throughout the year, peaking during the summer months. In December, the UV Index drops to a mild 1, indicating a low exposure category with a burn time of 45 minutes. This slower pace follows the heights of the summer, where values soared to 8 in June and July, representing a very high risk of UV exposure. The transition from high UV levels in late spring, with 7 in May and August, to the gentle glow of winter sun emphasizes the importance of adapting to seasonal changes. As December sets in, outdoor enthusiasts can enjoy the festive atmosphere with reduced UV concerns compared to the brighter months. For more detailed information on the UV conditions year-round, visit Boston UV Index.
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In December, Boston, United Kingdom experiences a noticeable decrease in sunshine hours, with only 103 hours recorded compared to the vibrant days of spring and summer. This dip is part of a broader trend that sees sunshine gradually diminish from a high of 378 hours in May to the winter months. Amidst this seasonal shift, December’s sunlight, though limited, still offers a gentle reminder of the warmer months ahead. As days grow shorter and evenings linger longer, this coastline town finds its charm in the soft, fading light of winter, inviting cozy gatherings and reflective moments in a month often filled with holiday spirit.
When considering the likelihood of sunny weather in December in Boston, United Kingdom, the statistics reveal a notable dip, with only a 19% chance of sunshine. This figure is part of a broader trend that sees winter months generally experiencing lower sun exposure, particularly as the year comes to a close. While December's chances are lower, it follows a pattern that starts to pick up significantly in the spring, especially in April when the likelihood of sunny days jumps to 44%. Overall, the transition from the chill of winter to the brightness of spring underscores December's position as one of the grayest months for sunlight, making the rare sunny day all the more noteworthy.
In Boston, United Kingdom, December heralds the arrival of shortest days of the year, with daylight lasting only 7 hours. This gradual decline in daylight begins in late autumn—November offers a slightly brighter picture at 8 hours. As the year transitions from the vibrant light of summer months, where June and July boast a generous 16 hours of daylight, the trend shifts rapidly towards the darker winter months. By February, a glimmer of hope emerges with 9 hours of daylight, hinting at the eventual return of longer days as spring approaches. Overall, the daylight duration in Boston reflects a rhythmic ebb and flow, emphasizing the stark contrasts between the vibrant long days of summer and the subdued, brief daylight of winter.
As December blankets Boston, UK, in its winter chill, the average wind speed settles at a brisk 4.8 m/s (11 mph), reflecting a steady consistency indicative of the month transitioning into deeper winter. This wind speed mirrors the averages seen in both January and November, suggesting a return to the seasonal norm after the sharper breezes experienced in October. Throughout the year, winds in Boston have ebbed and flowed, with June and July presenting the calmest atmospheric conditions. However, as autumn yields to winter, the winds pick up slightly, reminding residents of the hearty gales that often accompany this time of year. The overall trend illustrates a gentle rise in wind speed leading up to the new year, particularly evident with February standing out as the windiest month at 5.3 m/s (12 mph), promising an invigorating start to the season.
The weather in Boston changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Boston and find detailed weather information for every month.
December and January in Boston display notable differences in weather conditions. December typically sees a wider range of temperatures, with minimums around -2°C (29°F) and averages peaking at 6°C (43°F). In contrast, January experiences slightly colder temperatures, with lows of -4°C (26°F) and an average of 5°C (41°F). Precipitation is higher in December, totaling 72 mm (2.8 in) over 15 days, compared to January's 43 mm (1.7 in) spread over just 8 days. Both months have similar humidity levels, hovering around 88-89%. For more detailed information, check out Boston weather in January.
December and February exhibit some similarities in their average temperatures, both hovering around 6°C (43°F), but the extremes vary slightly. December experiences milder minimum temperatures of -2°C (29°F) compared to February's chillier lows of -6°C (22°F). However, February boasts slightly warmer maximum temperatures, reaching up to 17°C (63°F) compared to December's peak of 15°C (59°F). Precipitation is more frequent in December, occurring on 15 days and totaling 72 mm (2.8 in), whereas February sees less precipitation over 11 days, totaling 58 mm (2.3 in). Overall, while both months are relatively moist with high humidity—88% in December and 87% in February—February tends to feel slightly colder, especially at night. For more detailed weather information, check out Boston weather in February.
December weather typically showcases cooler temperatures, with averages around 6°C (43°F) and a maximum of 15°C (59°F), while March generally brings a gradual warming, featuring an average temperature of 7°C (45°F) and highs reaching 21°C (70°F). Despite being wetter with 72 mm (2.8 in) of precipitation over 15 days in December, March experiences lesser precipitation at 56 mm (2.2 in) across 12 days. Both months share similar humidity levels, with December slightly higher at 88% compared to March's 86%. To explore more about the weather in March, check out Boston weather in March.
Comparing the weather in December and April reveals notable differences in temperature and precipitation patterns. In December, temperatures range from a chilly -2°C (29°F) to a mild 15°C (59°F), with an average of 6°C (43°F). The month experiences significant precipitation, totaling 72 mm (2.8 in) across about 15 days, accompanied by high humidity at 88%. In contrast, April sees a more pleasant temperature range, with nighttime lows around -1°C (31°F) and daytime highs soaring up to 26°C (79°F), averaging 9°C (48°F). This spring month features much lighter rainfall, totaling just 32 mm (1.3 in) over approximately 8 days, and slightly lower humidity at 85%. For a deeper insight into the weather during this transitional season, check out Boston weather in April.
When comparing the weather in December and May, there are notable differences in temperature and overall climate conditions. December typically experiences colder temperatures, with a minimum of -2°C (29°F) and an average of 6°C (43°F), while May enjoys milder temperatures, starting at a minimum of 1°C (35°F) and averaging 12°C (54°F). The maximum temperatures in May can reach up to 27°C (80°F), significantly warmer than December's highest of 15°C (59°F). Precipitation levels are somewhat similar, with December receiving 72 mm (2.8 in) over 15 days and May slightly less at 65 mm (2.6 in) over 12 days. Humidity is slightly higher in December at 88% compared to 83% in May, making the latter month feel more comfortable. For more detailed information on May weather, you can visit Boston weather in May.
When comparing the weather in December and June, it's clear that June boasts milder and warmer conditions. In December, temperatures range from a chilly -2°C (29°F) to a maximum of 15°C (59°F), accompanied by high humidity at 88% and a total precipitation of 72 mm (2.8 in) over 15 days. In contrast, June sees a more comfortable temperature spectrum starting at a minimum of 6°C (43°F) and peaking at a warm 30°C (86°F), with slightly less precipitation at 74 mm (2.9 in) over just 11 days and lower humidity at 83%. For a closer look at Boston's delightful June weather, visit Boston weather in June.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -2°C to a maximum of 15°C, making it necessary to bundle up during the colder days. The month experiences significant precipitation, averaging 72 mm over 15 days, and the humidity is notably high at 88%. In contrast, July offers a much warmer climate, with temperatures typically ranging from 8°C to a sweltering 33°C, providing a stark difference in outdoor comfort. While July sees slightly lower precipitation at 69 mm over 11 days, the humidity drops to 79%, making it a more pleasant time for outdoor activities. For more details on July weather, you can check Boston weather in July.
December and August present notably different weather patterns. In December, temperatures can drop as low as -2°C (29°F), with an average of 6°C (43°F) and highs reaching 15°C (59°F). This month also experiences significant precipitation, totaling 72 mm (2.8 in) over about 15 days, accompanied by a high humidity level of 88%. In contrast, August offers a much warmer climate, with minimum temperatures around 9°C (49°F), average highs of 17°C (64°F), and peaks at a sweltering 32°C (89°F). Although August sees slightly more precipitation at 80 mm (3.1 in) over 12 days, the humidity is lower at 78%. For more details on weather in this month, check out Boston weather in August.
In comparing the weather of December and September, we see notable differences. December experiences a colder climate with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), and an average temperature of 6°C (43°F). In contrast, September boasts milder temperatures, with lows of 4°C (39°F) and highs reaching 28°C (83°F), giving it an average of 15°C (59°F). Precipitation is more frequent in December, occurring on about 15 days with a total of 72 mm (2.8 in), while September sees a bit less rain at 60 mm (2.4 in) over 10 days. Humidity levels are slightly higher in December at 88%, compared to September's 84%. For more details on September weather, you can visit Boston weather in September.
In comparing December and October weather, December tends to be significantly cooler, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), in contrast to October's more moderate temperatures that range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F). Both months experience similar levels of precipitation, with December at 72 mm (2.8 in) over 15 days and October slightly higher at 74 mm (2.9 in) over 13 days. While the humidity remains constant at 88% in both months, the overall feeling of December is distinctly colder and more winter-like compared to the mild and often pleasant days of October. For more details on October's weather, visit Boston weather in October.
December weather tends to be cooler and wetter compared to November. While both months experience a minimum temperature of -2°C (29°F), December has a lower average temperature of 6°C (43°F) compared to November's average of 8°C (46°F). Additionally, December sees an increase in precipitation, with 72 mm (2.8 in) falling over 15 days, whereas November has 54 mm (2.1 in) of precipitation over just 10 days. Humidity levels are relatively similar, with December at 88% and November slightly higher at 89%. For more details on November weather, you can visit Boston weather in November.
As December rolls in, Boston experiences a noticeable shift in weather, distinct from the milder months that precede it. The air turns crisper, with temperatures dipping to their chilly lows, while the average hovers significantly cooler than fall. This month also welcomes more frequent precipitation, with nearly half the month seeing rain, contributing to a humid atmosphere that can feel quite biting. In contrast to the brighter days of late autumn, December sets the stage for winter's arrival, making it a month of transition. For a deeper understanding of how Boston’s climate shapes this seasonal change, explore further at Boston Climate.