Last updated: February 24, 2025
December in Bar Harbor, United States, showcases a dramatic range of temperatures, with maximums reaching 15°C (59°F) and plunging to a chilling minimum of -22°C (-7°F). The average temperature hovers around a frigid -1°C (30°F), providing a wintry backdrop for the festive season. Precipitation is quite prevalent, with an accumulation of 138 mm (5.4 in) spread over 11 days, contributing to a notably humid environment at 84%. This month presents a captivating blend of cold and moisture, perfect for those who appreciate a picturesque winter landscape.
In December, Bar Harbor experiences a noticeable chill as winter settles in, with temperatures ranging from a brisk -22°C (-7°F) at night to a milder 15°C (59°F) during the day. The average temperature hovers around -1°C (30°F), marking a transition from the previous month's cold, yet milder, conditions. This month serves as a precursor to the harshest winter months ahead, with the daytime highs being slightly warmer compared to January and February. The stark contrast between the minimums and maximums encapsulates the essence of winter in this coastal gem, inviting visitors to embrace the serene beauty of a snow-draped landscape while preparing for the chill that defines the season.
In Bar Harbor, United States, December marks a significant uptick in precipitation, with 138 mm (5.4 in) recorded over 11 days. This increase follows a notable trend where the late fall months, particularly November, also see high rainfall at 130 mm (5.1 in), hinting at a wet end to the year. As temperatures drop, precipitation in December not only surpasses that of previous months but also involves a consistent pattern of rain days, making it one of the wetter months in the region. This persistent moisture signals the transition into winter, setting the stage for potential snow and colder weather as the year closes out.
In December, Bar Harbor, United States, experiences a humidity level of 84%, which reflects a slight increase compared to the preceding months. This trend of elevated humidity during the winter months is notable, with January and February consistently high at 88%. As the year progresses into the spring, humidity begins to decrease, reaching its lowest point in June, July, and August at 74%. However, as autumn arrives, humidity rises again, peaking in November before tapering off slightly in December. Overall, Bar Harbor’s humidity showcases a clear seasonal rhythm: peaks in winter, dips in summer, and a gradual rise as autumn settles in, creating a uniquely variable yet captivating climate throughout the year.
As the year winds down, December in Bar Harbor presents a noticeable shift in the UV Index, dropping back to a low rating of 2, with a burn time of 45 minutes. This follows a summer full of harsh UV exposure, peaking at 10 in June, which warned beachgoers of the very high risk during the sunniest months. The trend reveals a gradual decline from the peak UV levels of mid-summer, transitioning through various exposure categories. As winter approaches, the exposure risk diminishes significantly, reminding residents and visitors alike to stay vigilant during sunnier winter days. For up-to-date information on UV levels, explore Bar Harbor UV Index.
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In Bar Harbor, December offers a cozy retreat as daylight begins to dwindle, bringing an average of 170 hours of sunshine for the month. This marks a gentle decline from the bright heights of summer, where August dazzles with 326 hours, showcasing the region's vibrant seasonal shift. As the year comes to a close, the daylight hours reflect a steady decrease, starting from 318 hours in July down to December's softer glow. While winter's chill sets in, Bar Harbor remains enchanting, its natural beauty partially illuminated by the remaining light, reminding residents and visitors alike of the transition towards the long, dark days of winter.
In December, Bar Harbor experiences a 39% chance of sunny weather, a slight dip compared to the preceding month, which boasts a more promising 55% likelihood of sunshine. This trend reflects a general seasonal shift, as sunshine probabilities tend to decrease during the winter months. Interestingly, while December's chances are modest, they are relatively consistent with the sunnier spring months of April (34%) and May (36%), indicating that this coastal town can still surprise visitors with sporadic clear skies even as winter sets in. However, the overall pattern shows that the sun becomes less frequent as the year winds down, hinting that cozy indoor activities might be the prime choice for locals and tourists alike during the holiday season.
As December settles in Bar Harbor, daylight begins to dwindle, offering only 8 hours of sunlight each day. This reduction marks the lowest point in the annual cycle, reflecting a steady decrease from a peak of 15 hours during the vibrant summer months of June and July. The progression throughout the year reveals a clear trend: as we transition from the longer, sun-soaked days of spring and summer into the heart of winter, daylight duration gradually diminishes. January and February provide a slight respite with 9 and 10 hours respectively, before the days start to lengthen again in March. However, the stark contrast between the summer's abundance and December's brevity serves as a reminder of the natural rhythms of light, drawing us inward as we herald the upcoming return of longer, brighter days ahead.
As December settles into Bar Harbor, the wind picks up slightly, averaging 4.6 m/s (10 mph), marking a notable increase from the calmer summer months. Throughout the year, wind speeds demonstrate a clear trend: after peaking in March at 5.1 m/s (11 mph), the winds wane during the warmer months, reaching their lowest in August with just 2.9 m/s (7 mph). However, as autumn transitions into winter, the winds start to regain their strength, culminating in December's refreshing gusts. This seasonal progression not only highlights the natural ebb and flow of Bar Harbor's climate but also invites visitors to experience the invigorating briskness of the winter air.
The weather in Bar Harbor 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 Bar Harbor and find detailed weather information for every month.
December and January present distinct yet chilly weather patterns. December experiences a slightly milder average temperature of -1°C (30°F), with maximums reaching up to 15°C (59°F), while January sees a drop in the average to -4°C (25°F). Both months have similar minimum temperatures, but January typically remains colder, with lows of -23°C (-8°F). Precipitation is higher in December at 138 mm (5.4 in) over 11 days, compared to January's 98 mm (3.9 in) over 9 days. Additionally, humidity is marginally higher in January at 88% compared to December's 84%. For more details on the winter conditions in Bar Harbor, check out Bar Harbor weather in January.
December and February share chilly temperatures, with December typically experiencing a wider range—from a minimum of -22°C (-7°F) to a maximum of 15°C (59°F)—while February's temperatures range slightly warmer at a minimum of -20°C (-4°F) and a maximum of 13°C (56°F). Average temperatures in December hover around -1°C (30°F), compared to February's average of -3°C (26°F). Precipitation levels are also notable, with December recording 138 mm (5.4 in) across 11 days, while February sees less precipitation at 90 mm (3.6 in) over 10 days. Additionally, February tends to be slightly more humid, with a humidity level of 88% compared to December's 84%. For more specific details about February weather, visit Bar Harbor weather in February.
When comparing the weather in December and March, we see some intriguing contrasts. December experiences colder temperatures, with a minimum of -22°C (-7°F) and an average of -1°C (30°F), while March is slightly milder, starting as low as -18°C (0°F) and averaging 0°C (32°F). Precipitation is more abundant in December, with 138 mm (5.4 in) over 11 days, compared to March’s 73 mm (2.9 in) over just 9 days. Humidity remains relatively high in both months, with December at 84% and March at 85%. For a more detailed look at what to expect, check out Bar Harbor weather in March.
December and April present contrasting weather patterns. In December, temperatures can plummet to a minimum of -22°C (-7°F), with an average temperature around -1°C (30°F) and a maximum of 15°C (59°F). The month experiences significant precipitation totaling 138 mm (5.4 in) across 11 days, accompanied by high humidity levels at 84%. In contrast, April offers milder conditions, with a minimum temperature of -4°C (24°F) and an average of 6°C (43°F), peaking at 18°C (65°F). While precipitation is slightly less at 129 mm (5.1 in) over 13 days, humidity drops to 81%. For more insights, check out Bar Harbor weather in April.
December and May present contrasting weather experiences. In December, temperatures can plunge as low as -22°C (-7°F), with an average around -1°C (30°F) and a maximum of 15°C (59°F). The month is marked by significant precipitation, totaling 138 mm (5.4 in) over 11 days, and high humidity at 84%. In stark comparison, May brings milder temperatures, with a minimum of 2°C (36°F), an average of 11°C (52°F), and highs reaching up to 25°C (78°F). Precipitation in May is lower, at 92 mm (3.6 in) over the same 11 days, and humidity decreases slightly to 76%. For more details on May weather, you can check Bar Harbor weather in May.
December and June exhibit striking contrasts in weather conditions. In December, temperatures can plummet as low as -22°C (-7°F), with an average temperature hovering around -1°C (30°F) and a maximum temperature reaching 15°C (59°F). This month also sees considerable precipitation, totaling 138 mm (5.4 in) over 11 days, coupled with high humidity at 84%. In stark contrast, June brings a much milder climate, with minimum temperatures starting at 6°C (42°F), an average of 16°C (61°F), and maximums soaring to 30°C (86°F). The precipitation during this month is notably less, with just 79 mm (3.1 in) over 9 days and lower humidity at 74%. For more specifics on the delightful weather June offers, check out Bar Harbor weather in June.
December and July present stark contrasts in weather conditions. In December, temperatures can plummet to a minimum of -22°C (-7°F), with an average temperature hovering around -1°C (30°F) and a maximum of 15°C (59°F). This winter month also sees significant precipitation, totaling 138 mm (5.4 in) over 11 days, accompanied by a high humidity level of 84%. In contrast, July experiences much milder weather, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 30°C (86°F) and an average of 19°C (67°F). July also yields less precipitation, averaging 80 mm (3.2 in) over 10 days, while humidity is lower at 74%. For a closer look at July's weather, you can visit Bar Harbor weather in July.
December and August present dramatically different weather conditions. In December, temperatures can plunge to a minimum of -22°C (-7°F), with an average of -1°C (30°F) and a maximum of 15°C (59°F). This month experiences significant precipitation, totaling 138 mm (5.4 in) over about 11 days and a high humidity of 84%. In contrast, August enjoys milder temperatures, with a minimum of 12°C (53°F), an average of 20°C (68°F), and a maximum of 29°C (85°F). Precipitation in August is considerably less, totaling 73 mm (2.9 in) over approximately 8 days and a lower humidity of 74%. For more specifics on August weather, you can check out Bar Harbor weather in August.
In December, the weather is characterized by much colder temperatures, with a minimum of -22°C (-7°F) and an average of -1°C (30°F), compared to September, where temperatures are significantly milder, ranging from a minimum of 5°C (42°F) to a comfortable average of 16°C (61°F). The maximum temperature in December reaches only up to 15°C (59°F), while September can peak at 27°C (81°F). Additionally, December sees more precipitation, with 138 mm (5.4 in) over 11 days, compared to September’s 95 mm (3.7 in) over just 7 days. Humidity is also higher in December at 84%, in contrast to September's 77%. For more details on the September weather, you can check out Bar Harbor weather in September.
When comparing December and October weather, a noticeable contrast emerges in both temperature and precipitation. December experiences much colder temperatures, with a minimum of -22°C (-7°F) and an average of -1°C (30°F), while October boasts a milder minimum of 0°C (32°F) and an average of 11°C (52°F). Precipitation levels are relatively comparable, with December recording 138 mm (5.4 in) over 11 days, slightly higher than October's 107 mm (4.2 in), also over 11 days. Humidity levels remain similar, at 84% in December and 82% in October. For a closer look at October conditions, visit Bar Harbor weather in October.
December's weather is notably colder than November's, with average temperatures dropping to -1°C (30°F) compared to November's milder 4°C (40°F). While both months experience similar levels of precipitation—138 mm (5.4 in) in December versus 130 mm (5.1 in) in November—December sees slightly more humidity at 84%, compared to November's 85%. Additionally, December features a minimum temperature of -22°C (-7°F), making it significantly chillier than November's minimum of -15°C (6°F). For more detailed information on November weather, you can check Bar Harbor weather in November.
As December sets in, Bar Harbor experiences a notable shift in weather compared to the milder months of spring and fall. With average temperatures hovering around -1°C (30°F), this month brings a stark contrast to the warmer seasons, often dipping to chilling lows of -22°C (-7°F). Precipitation becomes more frequent, with about 11 days of rainfall contributing to a total of 138 mm (5.4 in), making the air feel even more humid at 84%. This combination of colder temperatures and persistent moisture transforms the landscape into a winter wonderland, enticing visitors with its frosty beauty. For a deeper understanding of how Bar Harbor’s weather evolves throughout the year, explore Bar Harbor Climate.