December Weather in Sag Harbor, United States

Last updated: February 24, 2025

In Sag Harbor, December brings a notable chill as temperatures fluctuate between a maximum of 16°C (61°F) and a minimum of -9°C (16°F), resulting in an average of 5°C (42°F). This month is characterized by ample precipitation, totaling 147 mm (5.8 in), spread over 12 days of the month, and an average humidity level of 80%. As the year draws to a close, the wintery atmosphere adds a distinctive charm to this picturesque coastal town, inviting residents and visitors alike to embrace the season's cozy and often brisk weather.

December Temperature in Sag Harbor

In December, Sag Harbor transitions into the heart of winter, with temperatures showcasing a distinct chill. The month sees minimums around -9°C (16°F), a stark contrast to the highs that peak at 16°C (61°F). With an average temperature of 5°C (42°F), it's a time when the cozy appeal of this seaside town becomes even more alluring. As the year winds down, residents and visitors alike can expect crisp days and cold nights, encouraging the warmth of holiday gatherings. The steady decline in temperatures from the mild fall months highlights the full embrace of winter, making December a time for both reflection and celebration in this charming coastal community.

December Weather in Sag Harbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sag Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363739465464727368615042
Data source: Temperature data for Sag Harbor 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 Sag Harbor

In December, Sag Harbor experiences a noticeable increase in precipitation, recording 147 mm (5.8 in) over 12 days. This uptick is consistent with the trend observed throughout the fall months, where rainfall peaks significantly, especially with October’s substantial 160 mm (6.3 in). As the year winds down, December serves as a transition, bridging the wetter seasons with a blend of robust rainfall and crisp winter air. Despite the drop in temperature, December’s precipitation levels still position it among the wetter months, hinting that winter in Sag Harbor can be both lush and dynamic.

December Precipitation Trends in Sag Harbor

The chart displays monthly precipitation patterns in Sag Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89123113137129729910399161113147
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sag Harbor

In Sag Harbor, the humidity trends throughout the year reveal a fascinating pattern, particularly in December, where humidity levels stabilize at 80%. This is consistent with the slightly elevated levels seen in the preceding months, notably November with its 80% humidity as well. As the seasons shift, the region experiences its highest humidity in the winter months of January and February at 84%, while temperatures begin to warm in spring and summer, leading to a gradual decline in moisture levels. Despite drops to 75% during the peak summer months, December serves as a reminder of the lingering moisture as the year closes, maintaining a cozy but damp atmosphere that characterizes Sag Harbor's winter. Overall, the humidity levels reflect a mild fluctuation, creating a rich tapestry of weather that defines life in this charming coastal town.

December Average Humidity in Sag Harbor

This chart illustrates the average monthly humidity levels in Sag Harbor, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sag Harbor

As winter settles in Sag Harbor, December brings a notable dip in UV exposure, with the UV Index falling to 2, placing it in the low exposure category. This trend highlights a significant decrease from the peak UV levels experienced during the summer months, where the index soared to a maximum of 10 in both June and July. With burn times extending to 45 minutes, December offers a more forgiving environment for sun exposure, compared to the more alarming 15-minute burn times from late spring through early fall. Those venturing out can enjoy the seasonal beauty with less urgency for sun protection, but it remains wise to stay informed. For more information about current UV levels, check out the details here: Sag Harbor UV Index.

Maximum UV Index Levels in Sag Harbor for December

The chart shows the monthly maximum UV Index (UVI) for Sag Harbor 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.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Sag Harbor 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.

December Sunshine in Sag Harbor

In the charming village of Sag Harbor, December ushers in a cozy retreat, averaging 177 hours of sunlight throughout the month. While this marks a dip from the vibrant summer months—with July basking in a radiant 349 hours—December still offers a gentle glow. As the year winds down, the contrast between the longest and shortest days is palpable, reflecting a seasonal shift that invites both reflection and festivity. Notably, December's sunshine continues to outshine the dismal winter days many experience elsewhere, embodying the unique allure of this coastal town during the holiday season. This trend showcases how Sag Harbor remains a welcoming destination, where even in the depths of winter, the sun's embrace can still be savored.

Monthly Sunshine Duration in Sag Harbor: December Highlighted

The December sunshine duration represents the total number of hours Sag Harbor experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec153h185h261h250h291h321h349h327h281h229h208h177h
Data source: Sag Harbor December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sag Harbor During December

In Sag Harbor, the likelihood of sunny weather in December dips to 32%, reflecting one of the lower probabilities for sunshine throughout the year. This trend contrasts sharply with the sunnier months of March, which boasts a robust 59% chance, and November at 53%. The overall pattern suggests that as the year progresses into the winter months, particularly November and December, residents and visitors alike should prepare for more unpredictable and cloudier days. Yet, this seasonal shift is a reminder of the charm winters can bring to this picturesque town, even if the sun plays a more elusive role during this time.

Percentage of Sunny Days in December in Sag Harbor

The chart illustrates the percentage of sunny days in Sag Harbor throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sag Harbor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%31%59%49%46%41%45%35%49%46%53%32%
Data source: Sag Harbor December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sag Harbor in December

In Sag Harbor, United States, December marks the end of the daylight decline that begins with the shortening days of late autumn. With just 9 hours of daylight, the month mirrors the earlier winter months of November, reflecting a seasonal pattern that sees daylight gradually increasing from this point onward. January and February follow suit, beginning a gradual ascent into brighter days, as sunlight steadily returns with each passing month. The early months of spring see a more significant increase, culminating in the long, sun-soaked days of summer, where June shines brightest with 15 hours of daylight. As the year transitions into autumn, daylight begins its descent again, descending to the familiar 9 hours by December, creating a rhythmic cycle that defines the seasons in Sag Harbor.

Average Daylight Hours in Sag Harbor for December

The chart illustrates the variation in daylight duration in Sag Harbor throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 35m10h 38m11h 58m13h 20m14h 29m15h 3m14h 44m13h 43m12h 24m11h 3m9h 52m9h 15m
Data source: Sag Harbor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Sag Harbor

As December sweeps into Sag Harbor, the wind begins to whisper a change, with an average speed of 6.6 m/s (15 mph). This marks a slight cooling from the milder autumn months, reflecting a gradual decline from earlier highs, evident in November's 6.8 m/s. Overall, December's breezy ambiance continues the trend of diminishing wind speeds as winter approaches, following the more blustery depths of winter in January and February, both averaging 7.3 m/s. While December's winds are gentler than the preceding months, they still carry the crisp, invigorating chill of the season, inviting locals and visitors alike to enjoy the charming coastal landscape of Sag Harbor.

Average December Wind Speed in Sag Harbor

The chart displays monthly wind speed patterns in Sag Harbor, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec7.37.36.96.26.05.64.84.96.16.76.86.6 m/s
Data source: Sag Harbor December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Sag Harbor Compares to Other Months

The weather in Sag 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 Sag Harbor and find detailed weather information for every month.

December and January present a notable shift in weather patterns. In December, temperatures range from a minimum of -9°C (16°F) to a maximum of 16°C (61°F), with an average temperature of 5°C (42°F). The month sees considerable precipitation, totaling 147 mm (5.8 in) over 12 days and humidity levels averaging 80%. In contrast, January is generally colder, with temperatures dipping to a minimum of -13°C (8°F) and peaking at 13°C (56°F), leading to an average of 2°C (37°F). Precipitation decreases significantly to 89 mm (3.5 in) over just 9 days, while humidity rises slightly to 84%. For a more detailed overview of January's conditions, check Sag Harbor weather in January.

December and February present distinct winter weather patterns. In December, temperatures range from a chilly minimum of -9°C (16°F) to a milder max of 16°C (61°F), with an average of 5°C (42°F). The month sees considerable precipitation, totaling 147 mm (5.8 in) over 12 days and an 80% humidity level. In contrast, February tends to be a bit colder, with minimum temperatures dropping to -12°C (11°F) and an average of 3°C (37°F), peaking at 12°C (53°F). Precipitation is slightly less at 123 mm (4.8 in) over 11 days, coupled with a higher humidity of 84%. For those interested in the specific weather conditions, you can check Sag Harbor weather in February.

In December, temperatures can drop as low as -9°C (16°F) with an average of 5°C (42°F) and occasionally reaching a maximum of 16°C (61°F). The month is characterized by higher precipitation levels, totaling 147 mm (5.8 in) across 12 days, all while maintaining a humidity level of around 80%. In contrast, March experiences slightly milder temperatures, with a minimum of -7°C (20°F) and a slightly lower average of 4°C (39°F); maximum temperatures peak at 15°C (59°F). Precipitation also decreases to 113 mm (4.5 in) over about 10 days, and humidity remains comparable at 82%. For more details on March weather, you can visit Sag Harbor weather in March.

When comparing the weather in December and April, both months exhibit similar maximum temperatures, with highs reaching around 16°C (61°F). However, December tends to be colder overall, with an average temperature of 5°C (42°F) compared to April's warmer average of 8°C (47°F). Additionally, December experiences more severe conditions with minimum temperatures dropping to -9°C (16°F), while April’s temperatures remain above freezing, starting at a minimum of 0°C (33°F). Precipitation levels are relatively close, with December receiving slightly more at 147 mm (5.8 in) compared to April's 137 mm (5.4 in), though both months share a similar number of rainy days at 12. Humidity levels are also comparable, with December at 80% and April at 79%. For more detailed April weather information, you can check Sag Harbor weather in April.

December and May present quite contrasting weather experiences. In December, temperatures can dip as low as -9°C (16°F), with an average of 5°C (42°F) and a maximum of 16°C (61°F), accompanied by higher humidity levels at 80%. Precipitation is also significant, with around 147 mm (5.8 in) occurring over 12 days, giving the month a distinctly wintry feel.

In stark contrast, May brings milder temperatures, starting at a minimum of 4°C (39°F) and averaging 12°C (54°F), peaking at 20°C (69°F). While precipitation is slightly less at 129 mm (5.1 in) over 13 days, the humidity is lower at 75%, contributing to a more pleasant and spring-like atmosphere. For further details, you can check out Sag Harbor weather in May.

December and June present stark contrasts in weather conditions. In December, temperatures can dip as low as -9°C (16°F), with an average of 5°C (42°F) and a maximum reaching 16°C (61°F). This colder month also experiences significant precipitation, with 147 mm (5.8 in) falling over 12 days, along with high humidity at 80%. In contrast, June boasts much milder temperatures, ranging from a minimum of 11°C (52°F) to an average of 18°C (64°F) and a maximum of 24°C (75°F). Precipitation is less frequent in June, with only 72 mm (2.9 in) recorded over 8 days and a slightly lower humidity of 78%. For more details on temperatures and conditions, check out Sag Harbor weather in June.

December and July present strikingly different weather patterns. In December, temperatures can drop as low as -9°C (16°F), with an average of 5°C (42°F) and a high reaching only 16°C (61°F). The month is characterized by significant precipitation, totaling 147 mm (5.8 in) over about 12 days, paired with a humidity level of 80%, creating a chilly and damp atmosphere. In contrast, July boasts a much warmer climate, with minimum temperatures around 16°C (61°F) and averages peaking at 22°C (72°F), reaching a maximum of 28°C (82°F). The rainfall is also lighter in July, at 99 mm (3.9 in) over approximately 10 days, with slightly lower humidity at 76%. For more insights on July weather specifically, you can visit Sag Harbor weather in July.

December and August present starkly contrasting weather conditions. In December, temperatures can plummet to a low of -9°C (16°F), with an average temperature of 5°C (42°F) and a high reaching 16°C (61°F). The month is characterized by significant precipitation, totaling 147 mm (5.8 in) over 12 days, accompanied by relatively high humidity at 80%. In contrast, August enjoys much milder temperatures, with a minimum of 17°C (63°F), an average of 23°C (73°F), and a maximum of 27°C (80°F). Rainfall is less frequent, accumulating to 103 mm (4.0 in) over only 9 days, and humidity is slightly lower at 76%. For more detailed insights into August weather, you can visit Sag Harbor weather in August.

In December, temperatures can be quite chilly, with averages around 5°C (42°F) and minimums dropping to -9°C (16°F), compared to the milder conditions of September, where temperatures range from a minimum of 12°C (55°F) to an average of 20°C (69°F). Additionally, while December experiences higher precipitation levels at 147 mm (5.8 in) over 12 days, September sees less rain, with only 99 mm (3.9 in) across 10 days. Humidity levels are also slightly elevated in December at 80%, compared to 75% in September, contributing to the colder feel of the winter month. For more detailed insights, check out Sag Harbor weather in September.

In comparing the weather of December and October, we see a notable shift in temperature and precipitation patterns. October features a milder climate, with average temperatures ranging from a minimum of 5°C (42°F) to a maximum of 24°C (75°F), while December experiences colder temperatures, with a range from -9°C (16°F) to 16°C (61°F). Precipitation is slightly higher in December, totaling 147 mm (5.8 in) over 12 days, compared to 160 mm (6.3 in) over 14 days in October. Additionally, humidity levels are slightly higher in December at 80%, compared to 75% in October, contributing to the overall chill of the winter month. For more detailed information on October's weather, you can visit Sag Harbor weather in October.

In comparing the weather of December and November, December tends to be colder, with average temperatures dropping from 10°C (50°F) in November to just 5°C (42°F) in December. The minimum temperatures in December can reach as low as -9°C (16°F), whereas November's minimum is milder at -5°C (24°F). Precipitation levels also see an increase, with December recording 147 mm (5.8 in) over 12 days compared to November's 113 mm (4.4 in) over 10 days. Both months share similar humidity levels at 80%, but the overall chill and higher precipitation in December create a noticeably different atmosphere. For more details on November weather in Sag Harbor, visit Sag Harbor weather in November.

Compare Sag Harbor's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Sag Harbor

December in Sag Harbor brings a distinct chill compared to the milder months preceding it. As temperatures dip significantly, with an average hovering around 5°C (42°F), residents and visitors can expect an atmosphere laden with humidity that often hovers around 80%. The month is marked by increased precipitation, with about 12 days of rain contributing to a total of 147 mm (5.8 in), creating a brisk, wintry backdrop for the town. The contrast in weather conditions highlights December as a time for cozy indoors and holiday festivities, making it a unique experience in the annual cycle. For more insights into the seasonal trends, visit Sag Harbor Climate.