December Weather in Rockport, United States

Last updated: February 24, 2025

December in Rockport, United States brings an array of winter conditions characterized by a maximum temperature of 13°C (55°F), which contrasts starkly with an average of 0°C (33°F) and a chilly minimum of -18°C (0°F). The month tends to be quite wet, accumulating approximately 160 mm (6.3 in) of precipitation over 12 days, adding to the wintry ambiance. High humidity levels at 84% create a damp chill in the air, making this festive season one of both beauty and briskness, encouraging cozy gatherings while inviting outdoor adventures in the serene, snow-blanketed landscapes.

December Temperature in Rockport

In Rockport, United States, December settles in with a chill, as temperatures plunge to an average low of -18°C (0°F). The month marks a transition from the milder late fall, with average temperatures hovering around 0°C (33°F). Despite the cold, the highs reach a pleasant 13°C (55°F), offering glimpses of warmth amidst the winter's grasp. This December chill sets the stage for the subzero cold characteristic of the following months, showcasing a noticeable shift as the region prepares for the heart of winter. With each passing day, the landscape transforms, inviting residents to embrace cozy indoors and the beauty of a frosted environment.

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

The chart illustrates December temperature patterns in Rockport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec282932414957636561534233
Data source: Temperature data for Rockport 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 Rockport

In Rockport, United States, December often ushers in a noteworthy increase in precipitation, with an average of 160 mm (6.3 in) falling over 12 days. This marks a significant rise compared to the preceding months, particularly following November's 145 mm (5.7 in). The trend of heavier rainfall peaks during the late fall and early winter months is evident, as October and April also see substantial totals of 169 mm (6.6 in) and 169 mm (6.7 in), respectively. With the holiday season approaching, residents can expect a blend of cozy winter atmospheres punctuated by this regular bout of December showers, contributing to the seasonal charm that characterizes the region.

December Precipitation Trends in Rockport

The chart displays monthly precipitation patterns in Rockport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec11210889169114871009099169145160
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rockport

In Rockport, United States, December ushers in a slight uptick in humidity, settling at 84%, a modest rise from the previous month's 85%. This increase is part of a broader trend where the city experiences higher humidity levels during the winter months, with January and February maintaining a consistent 88%. Throughout the year, humidity steadily declines from the peak spring levels, with May’s 76% marking a shift towards drier conditions during the summer. As the year progresses, August remains the driest month, sustaining a comfortable 74%, before humidity levels gradually increase again in the fall. This seasonal rhythm highlights Rockport's characteristic humidity cycle, creating a unique, atmospheric charm in its coastal climate.

December Average Humidity in Rockport

This chart illustrates the average monthly humidity levels in Rockport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%85%81%76%74%74%74%77%82%85%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rockport

As December rolls in, Rockport experiences a notable drop in UV Index, settling at a low level of 2. This decline reflects the overall trend of decreasing UV exposure as the year comes to a close. With a burn time of 45 minutes, residents and visitors alike can enjoy longer periods outdoors without significant risk of sunburn. Following a peak in the summer months, where the UV Index reached highs of 9 and 10, the cooler winter days prompt a more relaxed approach to sun safety. As the season changes, it's always wise to stay informed about the UV Index to make the most of your outdoor activities. For detailed UV information, visit Rockport UV Index.

Maximum UV Index Levels in Rockport for December

The chart shows the monthly maximum UV Index (UVI) for Rockport 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.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Rockport 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 Rockport

In December, Rockport enjoys a pleasant 172 hours of sunshine, marking a gradual decline as the year reaches its end. Following a vibrant summer where the sun shone brightly for 328 hours in August, the sunlight begins to wane, yet December retains a healthy share compared to the earlier months. As the days shorten, the transition from the sunny heights of June and July to the quieter light of late autumn reflects a yearly rhythm, with the sunny hours dipping from 211 in October and 180 in November. This trend highlights Rockport's charming seasonal shifts, where even in winter, ample sunshine creates a warm and inviting atmosphere, wrapping up the year with a cozy glow.

Monthly Sunshine Duration in Rockport: December Highlighted

The December sunshine duration represents the total number of hours Rockport 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.
JanFebMarAprMayJunJulAugSepOctNovDec145h187h256h237h285h319h319h328h281h211h180h172h
Data source: Rockport December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rockport During December

In Rockport, the likelihood of enjoying sunny weather during December stands at 36%, reflecting a subtle dip after the vibrant month of November, which boasts a more favorable 56% chance of sun. This trend underscores the transitional nature of late fall into winter, as the year winds down. Interestingly, while December's sunshine probability is lower compared to the peak months of March and September, it’s on par with the sunniest months of June and February. Overall, December offers a moderate chance of clear skies amidst the cooler temperatures, inviting locals and visitors alike to embrace the crisp coastal charm of the season.

Percentage of Sunny Days in December in Rockport

The chart illustrates the percentage of sunny days in Rockport 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 Rockport experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec39%35%56%35%35%39%28%31%43%42%56%36%
Data source: Rockport December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rockport in December

As December unfolds in Rockport, United States, the daylight duration dwindles to just 8 hours, marking the shortest days of the year. This decrease is part of a broader seasonal cycle, where daylight gradually increases from 9 hours in January, peaking at 15 hours during the summery months of June and July before tapering off again. Notably, the transition from August to September shows a shift back to 12 hours, reflecting the onset of autumn. The gentle ebb and flow of daylight throughout the year captivates the essence of each season, with December's shorter days inviting a cozy ambiance as the community prepares to embrace winter.

Average Daylight Hours in Rockport for December

The chart illustrates the variation in daylight duration in Rockport throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 16m10h 27m11h 57m13h 29m14h 48m15h 27m15h 5m13h 55m12h 27m10h 55m9h 35m8h 53m
Data source: Rockport daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Rockport

As December sweeps into Rockport, the average wind speed reaches a brisk 6.6 m/s (15 mph), echoing the gusts of January. This resurgence highlights a notable trend, as the winds pick up once again after a gradual decline through the warmer months. From May's gentle 4.8 m/s (11 mph) to July's low of 4.1 m/s (9 mph), the summer months offer a reprieve from the invigorating breezes that characterize the colder seasons. However, starting in November, these winds begin to strengthen, setting the stage for the winter chill. In December, residents and visitors alike feel the familiar bite of the wind, which invigorates the coastal charm of Rockport, making it a perfect time to enjoy the brisk seaside air.

Average December Wind Speed in Rockport

The chart displays monthly wind speed patterns in Rockport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6.66.27.05.84.85.14.13.74.95.46.26.6 m/s
Data source: Rockport December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Rockport Compares to Other Months

The weather in Rockport 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 Rockport and find detailed weather information for every month.

December and January both feature cold temperatures, but January tends to be slightly chillier on average. While December sees an average temperature of 0°C (33°F) with a maximum of 13°C (55°F), January's average dips to -2°C (28°F), with a maximum of 10°C (51°F). In terms of precipitation, December is wetter with 160 mm (6.3 in) spread over 12 days, compared to January's 112 mm (4.4 in) over 9 days. Additionally, January has a higher humidity level at 88%, slightly above December's 84%. For more details, you can check out Rockport weather in January.

In December, the weather is characterized by a wide temperature range, with minimums dipping down to -18°C (0°F) and an average of around 0°C (33°F). The month sees significant precipitation, totaling 160 mm (6.3 in) over 12 days, alongside a high humidity level of 84%. In contrast, February is slightly colder on average, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 10°C (50°F) and an average of -2°C (29°F). Precipitation decreases to 108 mm (4.2 in) over 10 days, and humidity rises modestly to 88%. For more detailed information about the weather during February, you can visit Rockport weather in February.

December and March share similar average temperatures, hovering around freezing at 0°C (33°F). However, December experiences a wider range, with temperatures dipping as low as -18°C (0°F) and peaking at 13°C (55°F). In contrast, March's temperatures are slightly more stable, ranging from a minimum of -15°C (5°F) to a maximum of 10°C (50°F). Precipitation also varies, with December receiving 160 mm (6.3 in) over approximately 12 days, while March has less precipitation at 89 mm (3.5 in) across about 10 days. Humidity levels are quite comparable, at 84% in December and 85% in March. For a closer look at March weather specifics, check out Rockport weather in March.

In December, temperatures can be quite frigid, with lows plummeting to -18°C (0°F) and an average hovering around 0°C (33°F), while reaching a maximum of 13°C (55°F). The month also sees significant precipitation, averaging 160 mm (6.3 in) over about 12 days, accompanied by high humidity levels of 84%. In contrast, April heralds a milder climate, with minimum temperatures around -3°C (26°F) and an average of 5°C (41°F), peaking at 15°C (59°F). Although April experiences slightly more precipitation at 169 mm (6.7 in) over 14 days, the humidity is marginally lower at 81%. For more detailed weather insights, you can check Rockport weather in April.

December weather is characterized by significantly colder temperatures, with a minimum dropping to -18°C (0°F) and an average around 0°C (33°F). In contrast, May brings a milder climate, where minimum temperatures start at 2°C (36°F) and average around 9°C (49°F). While December sees higher precipitation levels at 160 mm (6.3 in) over 12 days, May has a reduced total of 114 mm (4.5 in) but also maintains the same number of rainy days. Additionally, December's humidity is notably higher at 84%, compared to the 76% humidity observed in May. For more details about the pleasant weather in May, visit Rockport weather in May.

December and June present starkly different weather conditions. In December, temperatures can plunge to a minimum of -18°C (0°F), with an average around 0°C (33°F) and a maximum of 13°C (55°F), making it a cold month for most. Additionally, December experiences significant precipitation of 160 mm (6.3 in) over approximately 12 days, coupled with high humidity levels at 84%. In contrast, June offers a more temperate climate with minimum temperatures of 8°C (46°F), averaging 14°C (58°F) and peaking at 25°C (77°F). Precipitation in June is considerably lower at 87 mm (3.4 in) across 9 days, and humidity is also reduced to 74%. For more details on June weather, you can check Rockport weather in June.

The weather in December is markedly colder than in July, with temperatures ranging from a frigid minimum of -18°C (0°F) to a maximum of 13°C (55°F) and an average around 0°C (33°F). In contrast, July boasts a much milder climate, featuring minimum temperatures of 12°C (54°F) and maximums reaching 25°C (78°F), with an average of 17°C (63°F). December also sees more precipitation, totaling 160 mm (6.3 in) across 12 days, compared to July's 100 mm (3.9 in) over 11 days. Additionally, humidity levels in December are higher at 84%, whereas July's humidity sits at a more comfortable 74%. For more detailed information, you can check Rockport weather in July.

In comparing the weather of December and August, we see a stark contrast in temperature and conditions. December experiences frigid temperatures ranging from a minimum of -18°C (0°F) to a maximum of 13°C (55°F), with an average temperature around freezing at 0°C (33°F). Precipitation is also notable, with 160 mm (6.3 in) falling over 12 days, accompanied by high humidity at 84%. In contrast, August boasts much milder weather with temperatures soaring from a minimum of 13°C (56°F) to a maximum of 24°C (76°F), averaging 18°C (65°F). The month sees significantly less precipitation at 90 mm (3.5 in) over 9 days and lower humidity at 74%. For more detailed insights, you can explore Rockport weather in August.

In December, temperatures experience a dramatic drop, with a minimum of -18°C (0°F) and an average of 0°C (33°F), while September enjoys milder conditions with a minimum of 9°C (48°F) and an average of 16°C (61°F). The precipitation in December is significantly higher at 160 mm (6.3 in) over 12 days, compared to September's 99 mm (3.9 in) over only 8 days. Moreover, December's humidity level is elevated at 84%, contrasted with September's 77%. For more specific details about the conditions in that month, you can check Rockport weather in September.

In comparing the weather between October and December, we see notable differences in temperature and precipitation. October typically presents milder conditions, with average temperatures ranging from a minimum of 1°C (34°F) to a maximum of 19°C (66°F). In contrast, December brings much colder temperatures, with a minimum of -18°C (0°F) and an average of just 0°C (33°F). Precipitation levels are relatively close, with October experiencing 169 mm (6.6 inches) over 13 days, while December has slightly less precipitation at 160 mm (6.3 inches) over 12 days. Both months maintain high humidity levels, but December is slightly more humid at 84% compared to October's 82%. For more details on October's weather, visit Rockport weather in October.

December weather shows a more pronounced chill compared to November, with average temperatures dropping from 6°C (42°F) in November to around 0°C (33°F) in December. While both months experience similar levels of precipitation, December slightly edges out November with a total of 160 mm (6.3 in) compared to 145 mm (5.7 in). Interestingly, humidity remains quite high in both months, hovering around 84% in December and 85% in November. For more details on November conditions, you can check out Rockport weather in November.

Compare Rockport's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Rockport

As December settles over Rockport, the transition to winter becomes unmistakable. With temperatures dipping significantly compared to the milder months, residents and visitors alike experience a chilly atmosphere, marked by frosty mornings and crisp nights. The increased precipitation, falling as both rain and snow, contributes to the 84% humidity that blankets the area, creating a damp chill in the air. Unlike the summer highs, the shift towards freezing temperatures can plunge to negative values, making warmth a coveted luxury. December's weather sets the stage for a picturesque winter landscape, inviting those ready to embrace the season. To dive deeper into Rockport's climatic trends throughout the year, visit Rockport Climate.