December Weather in Portarlington, Ireland

Last updated: March 17, 2025

In December, Portarlington, Ireland experiences a blend of brisk temperatures and notable precipitation. With a maximum of 14°C (57°F) and a chilling minimum plunging to -6°C (21°F), average daily temperatures settle at a cool 7°C (44°F). This month witnesses approximately 93 mm (3.7 in) of rainfall spread over 15 days, creating a damp atmosphere, complemented by high humidity levels of around 84%. The combination of cold weather and frequent rain makes December a quintessentially wintry month in Portarlington, perfect for cozy indoor activities and festive celebrations.

December Temperature in Portarlington

In December, Portarlington, Ireland, experiences the chill of winter, with temperatures dipping to a minimum of -6°C (21°F). The average temperature hovers around 7°C (44°F), while daytime highs struggle to reach 14°C (57°F). This month marks a noticeable decline in warmth compared to the milder conditions of November, which had average temperatures of 8°C (46°F). The trend towards colder weather is accentuated by deeper nighttime freezes, emphasizing the shift from autumn's lingering warmth to winter's firm grasp. As the year draws to a close, residents and visitors alike feel the bite of the season, making warm clothing a necessity amidst the frosty air.

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

The chart illustrates December temperature patterns in Portarlington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424345485358616056514644
Data source: Temperature data for Portarlington generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Portarlington

December in Portarlington, Ireland, ushers in a notable increase in precipitation, with an average of 93 mm (3.7 in) over 15 days of rainfall. This marks a peak in the yearly precipitation, surpassing the rainy months preceding it, such as February and October, which typically see around 86 mm and 83 mm, respectively. The persistent drizzle throughout the month often contributes to the region's lush greenery, setting the stage for the winter landscape. While the total precipitation may rise, it stands alongside the typical pattern of wetter months, highlighting a trend where December serves as a capstone to the year’s cumulative rainfall, reinforcing its reputation as one of the wettest periods in Portarlington.

December Precipitation Trends in Portarlington

The chart displays monthly precipitation patterns in Portarlington, 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.
JanFebMarAprMayJunJulAugSepOctNovDec558682487270729971838393
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Portarlington

In Portarlington, Ireland, December wraps up the year with an average humidity of 84%, showcasing a slight dip from the preceding months. This moderate decrease is part of a consistent trend observed throughout the year, where humidity levels fluctuate gently between 83% and 87%. Notably, the humidity is at its peak in October and November, hovering around 86-87%, before easing into December’s more comfortable levels. This pattern reflects the region’s typically moist climate, making the winter months feel fresh yet crisp, a hallmark of Portarlington's charming seasonal character.

December Average Humidity in Portarlington

This chart illustrates the average monthly humidity levels in Portarlington, 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.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%85%83%85%86%85%86%87%87%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Portarlington

In December, Portarlington, Ireland, experiences a low UV Index of 1, indicating minimal sun exposure risk. This trend of decreased UV levels follows the higher readings seen in the summer months, where values peaked at 8 in June and July, categorizing them as very high. As winter sets in, the average burn time increases to 45 minutes, providing ample opportunity for leisurely winter walks without the concern of sunburn. As the year winds down, it's clear that the sun's intensity wanes, encouraging residents and visitors alike to embrace the festive season with less UV exposure. For more insights on UV levels throughout the year, check out Portarlington UV Index.

Maximum UV Index Levels in Portarlington for December

The chart shows the monthly maximum UV Index (UVI) for Portarlington 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Portarlington 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 Portarlington

December in Portarlington, Ireland, brings a reflective close to the year with 89 hours of sunshine, marking a notable dip as daylight wanes in the winter months. This trend of decreasing sunlight begins after the vibrant summer months of June and July, which bask in nearly 365 hours of radiant sunshine, creating a stark contrast to the gloomier days that follow. As the year progresses, the hours of sunlight steadily decline, with January starting off low at 79 hours but gradually improving through February and March. However, by the time December arrives, the season's chill casts its shadow over the landscape, leaving the town yearning for the bright days ahead. Overall, the data reflects a rhythmic cycle of light and dark, echoing the seasonal changes that define life in this charming coastal town.

Monthly Sunshine Duration in Portarlington: December Highlighted

The December sunshine duration represents the total number of hours Portarlington 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.
JanFebMarAprMayJunJulAugSepOctNovDec79h135h173h280h369h363h365h308h274h224h114h89h
Data source: Portarlington December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Portarlington During December

In Portarlington, Ireland, the likelihood of sunny weather in December stands at 21%, illustrating a modest chance for some bright spells during the month. As the year progresses, the trend shows that April marks a peak of 40%, while the colder months experience a noticeable dip, especially in February and March, which see their sun chances fall to 20% and 18%, respectively. Interestingly, there's a slight rebound in sunshine potential as November approaches, reaching 25% before settling at December’s 21%. Overall, while December may not promise an abundance of sunshine, it offers a balance of cool crispness and the potential for occasional glowing winter rays.

Percentage of Sunny Days in December in Portarlington

The chart illustrates the percentage of sunny days in Portarlington 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 Portarlington experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%20%18%40%32%21%27%24%18%17%25%21%
Data source: Portarlington December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Portarlington in December

In Portarlington, Ireland, the progression of daylight throughout the year reveals an intriguing rhythm of seasonal change. December, with its 7 hours of daylight, marks the low point in the annual cycle, offering the shortest days as winter tightly grips the landscape. This contrasts sharply with the vibrant long days of June and July, where daylight extends to a generous 16 hours, allowing for abundant outdoor activities. As the year transitions from January's 8 hours to the burgeoning daylight of spring and summer, it becomes evident that each month beckons greater light. Following the peak of summer, daylight gradually retreats again, dipping down to November’s 8 hours before hitting its winter nadir in December. This cyclical pattern not only shapes daily life but also adds a dramatic flair to the Irish landscape, with each season offering its unique charm in harmony with the sun's unwavering journey across the sky.

Average Daylight Hours in Portarlington for December

The chart illustrates the variation in daylight duration in Portarlington throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 7m9h 49m11h 54m14h 2m15h 54m16h 53m16h 21m14h 40m12h 37m10h 30m8h 36m7h 34m
Data source: Portarlington daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Portarlington

As the year wraps up in Portarlington, Ireland, December brings a slight increase in wind speed, averaging 4.3 m/s (10 mph). This uptick reflects a subtle trend of rising winds as winter approaches, contrasting with the calmer breezes experienced in the summer months, where the average dipped to 2.6 m/s (6 mph) in July. Notably, while December's winds are stronger than the preceding months—particularly more pronounced than the mild 3.1 m/s (7 mph) of September and 3.6 m/s (8 mph) in May—the overall pattern reveals a gentle oscillation throughout the year. The winds invite a sense of invigorating chill, perfectly capturing the essence of the season as Portarlington transitions into the depths of winter.

Average December Wind Speed in Portarlington

The chart displays monthly wind speed patterns in Portarlington, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.85.24.13.13.63.42.63.23.14.23.94.3 m/s
Data source: Portarlington December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Portarlington Compares to Other Months

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

December and January display similar temperature ranges, with January experiencing slightly milder averages. December sees a minimum of -6°C (21°F) and an average of 7°C (44°F), while January's minimum is a bit warmer at -5°C (23°F) and an average of 6°C (43°F). Both months reach a maximum of 14°C (57°F). However, December is wetter, with 93 mm (3.7 in) of precipitation over 15 days, compared to January's 55 mm (2.1 in) over 10 days. Humidity levels are also slightly higher in December at 84%, while January has a humidity of 85%, making it feel a bit more damp. For more details on January weather, you can check out Portarlington weather in January.

December and February exhibit interesting similarities and differences in weather patterns. Both months experience high humidity levels, with December at 84% and February slightly higher at 86%. In terms of temperatures, December has a slightly wider range, with a minimum of -6°C (21°F) and a maximum of 14°C (57°F), while February sees a less extreme range with a minimum of -3°C (27°F) and a maximum of 16°C (61°F). Precipitation is quite comparable, too, with December receiving 93 mm (3.7 in) and February just a bit less at 86 mm (3.4 in), both occurring over approximately 15 days. For more specific insights into February weather, you can check out Portarlington weather in February.

In comparing the weather between December and March, both months exhibit similar average temperatures, with December averaging around 7°C and March slightly higher at 7°C as well, despite minutes differing slightly. December typically sees temperatures ranging from a frigid -6°C to a mild 14°C, while March can dip a bit lower to -7°C but peaks at a warmer 17°C. Precipitation levels are also notable; December receives about 93 mm across 15 days, while March has a bit less at 82 mm but over 16 days of rainfall. Humidity remains high in both months, with December at 84% and March just slightly higher at 86%. For more specific details about March weather, you can visit Portarlington weather in March.

December and April present contrasting weather conditions. In December, temperatures range from a chilly minimum of -6°C (21°F) to a maximum of 14°C (57°F), with an average of 7°C (44°F). The month experiences higher precipitation, with 93 mm (3.7 in) spread over 15 days, contributing to a humid atmosphere with 84% humidity. In contrast, April brings a milder climate, where temperatures range from -4°C (26°F) to a warmer maximum of 21°C (71°F), averaging at 9°C (48°F). Precipitation decreases significantly to 48 mm (1.9 in) across just 10 days, with humidity slightly higher at 85%. For more detailed information on April weather, you can visit Portarlington weather in April.

In December, the weather is notably colder, with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 14°C (57°F), and an average of 7°C (44°F). This month also sees significant precipitation, totaling 93 mm (3.7 in) over 15 days, and a high humidity level of 84%. In contrast, May brings milder conditions, with temperatures that fluctuate from -1°C (30°F) to a warmer maximum of 24°C (76°F), averaging around 12°C (53°F). Precipitation decreases to 72 mm (2.8 in) over 12 days, maintaining a similarly high humidity at 83%. For more specifics on weather conditions in May, you can visit Portarlington weather in May.

December and June present contrasting weather experiences. In December, temperatures range from a chilly -6°C (21°F) to a mild 14°C (57°F), with an average of 7°C (44°F). The month sees significant precipitation, totaling 93 mm (3.7 in), spread over 15 days, and humidity remains high at 84%. In contrast, June offers warmer conditions, with temperatures varying from a minimum of 4°C (40°F) to a maximum of 28°C (83°F), averaging 14°C (58°F). Precipitation in June is somewhat lower at 70 mm (2.7 in), occurring over 14 days, with humidity at a slightly elevated level of 85%. For a closer look at June weather patterns, visit Portarlington weather in June.

In December, temperatures range from a chilly minimum of -6°C (21°F) to a maximum of 14°C (57°F), with an average of 7°C (44°F). This month experiences more precipitation, totaling 93 mm (3.7 in) over approximately 15 days, and the humidity is relatively high at 84%. In contrast, July boasts much warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 29°C (84°F), averaging around 16°C (61°F). The precipitation is lighter in July at 72 mm (2.8 in) over about 12 days, and the humidity remains slightly elevated at 86%. For more detailed information, you can check Portarlington weather in July.

December weather contrasts sharply with August's milder conditions. In December, temperatures can drop to a minimum of -6°C (21°F) and average around 7°C (44°F), with a maximum of only 14°C (57°F). This month experiences significant precipitation, totaling 93 mm (3.7 in) over approximately 15 days, and a humidity level of 84%. In comparison, August offers a more favorable climate with minimum temperatures starting at 6°C (43°F) and an average of 15°C (60°F), peaking at 24°C (75°F). Although August sees slightly more rainfall at 99 mm (3.9 in) over 17 days, it maintains a similar humidity of 85%. For a detailed overview, check Portarlington weather in August.

In December, the weather is notably colder than in September, with average temperatures ranging from a minimum of -6°C (21°F) to a maximum of 14°C (57°F), while September enjoys a milder range of 0°C (33°F) to 26°C (80°F). Precipitation levels are slightly higher in December at 93 mm (3.7 in) over 15 days, compared to 71 mm (2.8 in) over 12 days in September. Additionally, December has a humidity level of 84%, which is only slightly lower than September's 86%, making both months quite damp. For more specific details on September weather, you can visit Portarlington weather in September.

In comparing the weather conditions of December and October, it is clear that December is generally colder, with average temperatures ranging from a minimum of -6°C (21°F) to a maximum of 14°C (57°F), while October offers milder conditions with a minimum of -2°C (29°F) and a maximum of 20°C (68°F). Despite December having slightly higher precipitation levels at 93 mm (3.7 in) compared to October's 83 mm (3.3 in), both months share the same number of rainy days, averaging 15. Additionally, December’s humidity stands at 84%, just a bit lower than the 87% recorded in October. For more details on October weather specifically, you can visit Portarlington weather in October.

In comparing the weather of December and November, December tends to be slightly colder, with average temperatures ranging from -6°C (21°F) to 14°C (57°F), compared to November's range of -3°C (28°F) to 16°C (60°F). While both months experience a similar amount of precipitation—93 mm (3.7 in) in December versus 83 mm (3.3 in) in November—December has a marginally higher humidity level at 84%, compared to November's 86%. Additionally, December has slightly more rainy days, with precipitation occurring on 15 days compared to 14 days in November. For a detailed look at November's weather, you can visit Portarlington weather in November.

Compare Portarlington's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Portarlington

As December unfolds in Portarlington, the weather takes on a distinctly wintry character, marked by lower temperatures and an increase in precipitation compared to other months. While the average temperature hovers around a chilly 7°C, the maximum rarely climbs above 14°C, and the minimum can plummet to -6°C. This month also sees a significant uptick in humidity at 84%, contributing to a brisk and often damp atmosphere. With 15 days of rainfall accumulating to about 93 mm, the landscape transforms, urging both residents and visitors to embrace the cozy charm of the season. For a deeper dive into the regional climate, be sure to explore Portarlington Climate.