December Weather in Westport, Ireland

Last updated: March 17, 2025

December in Westport, Ireland offers a chilly climate characterized by a maximum temperature reaching up to 13°C (55°F) and an average of 7°C (44°F), with lows dipping to -3°C (27°F). This month sees considerable precipitation, accumulating around 134 mm (5.3 in) over 19 days, contributing to the area's lush greenery. The humidity averages a high 89%, creating a crisp yet damp atmosphere, perfect for those who enjoy the fresh, invigorating air of winter by the scenic coast. Whether you're exploring the charming streets or embracing the stunning landscapes, December in Westport is a quintessential Irish experience.

December Temperature in Westport

In Westport, Ireland, December heralds the start of winter with temperatures that typically range from a brisk -3°C (27°F) at night to a more moderate 13°C (55°F) during the day. As the year draws to a close, the average temperature settles around 7°C (44°F), slightly cooler than November yet still milder than the preceding months. As with the earlier winter months, frost can visit, but the overall trend reflects a gradual cool-down from autumn. December's temperatures, while chilly, remain surprisingly mild compared to the colder extremes of January and February, making it a fascinating time to experience the crisp coastal charm of Westport amidst its festive atmosphere.

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

The chart illustrates December temperature patterns in Westport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434344485256595855504644
Data source: Temperature data for Westport 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 Westport

In December, Westport, Ireland experiences a notable increase in precipitation, with 134 mm (5.3 in) of rain recorded over 19 days. This level of rainfall is consistent with the trends observed throughout the preceding months, particularly November, which saw 121 mm (4.8 in) of precipitation over 18 days. The wettest months appear in the latter half of the year, with August and October also exceeding 130 mm. As winter sets in, the frequency of rainy days tends to rise, indicating that December's weather is both wet and misty, setting the stage for a classic Irish holiday season.

December Precipitation Trends in Westport

The chart displays monthly precipitation patterns in Westport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec95144114657791101144101138121135
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Westport

December in Westport, Ireland, typically sees a humidity level of 89%, reflecting the transition from the high humidity of late autumn into the depths of winter. This month maintains a slightly elevated humidity, standing out against the backdrop of a gradual decrease seen from the peak levels of October (91%) and November (92%). As the year comes to a close, December shows a resilience in moisture, emphasizing Westport's characteristically damp climate. Interestingly, despite the drop from previous months, December's humidity is still significantly higher than in the spring and early summer, with levels peaking in early autumn and tapering only slightly by year-end. This trend highlights Westport's reputation for cool, moist conditions, making it a unique destination year-round.

December Average Humidity in Westport

This chart illustrates the average monthly humidity levels in Westport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Westport

As December unfolds in Westport, Ireland, residents can expect a low UV Index of 1, indicative of minimal sun exposure risk. This trend of low UV levels continues from November, where the index also measured 2, reflecting the gradual transition into winter. With a burn time of 45 minutes, it's a great time for outdoor activities without the specter of sunburn. This is in stark contrast to the heights of summer when UV levels soar to 8 in July and June, demanding more caution and protective measures. For those wishing to keep track of UV fluctuations throughout the year, Westport UV Index provides up-to-date insights and guidance.

Maximum UV Index Levels in Westport for December

The chart shows the monthly maximum UV Index (UVI) for Westport 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: Westport 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 Westport

As December rolls into Westport, Ireland, the days grow shorter, bringing just 91 hours of sunshine—a stark contrast to the vibrant spring and summer months. The year begins with a modest 72 hours in January, gradually building to a peak of 402 hours in May, when the sun shines at its brightest. June and July maintain this radiant trend, with 384 and 385 hours respectively, before the sunshine gently starts to wane in August. As autumn descends, the hours drop significantly: September offers 287 hours, followed by 222 hours in October and 115 hours in November. This gradual decline underscores the seasonal rhythm of Westport, where sunlight dwindles to welcome the winter months, yet even in December, the lingering light holds a promise for the days to come.

Monthly Sunshine Duration in Westport: December Highlighted

The December sunshine duration represents the total number of hours Westport 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.
JanFebMarAprMayJunJulAugSepOctNovDec72h136h188h320h402h384h385h343h287h222h115h91h
Data source: Westport December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Westport During December

In Westport, Ireland, the likelihood of experiencing sunny weather in December is relatively low, with only a 14% chance of sunshine. This trend aligns with the overall pattern observed throughout the year, where the peak months for sunny spells—April and May—see chances soaring to 40% and 35% respectively. As the year progresses towards winter, the probability of sunny days diminishes, evidenced by the significantly lower figures in the latter part of the year, including January's 26% and November's 22%. Thus, for those dreaming of a bright December in Westport, it might be time to brace for the region's typically overcast winter skies.

Percentage of Sunny Days in December in Westport

The chart illustrates the percentage of sunny days in Westport 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 Westport experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%19%14%40%35%16%22%19%14%17%22%14%
Data source: Westport December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Westport in December

In Westport, Ireland, the daylight duration experiences a distinctive ebb and flow throughout the year, with December marking the low point at just 7 hours of sunlight each day. As we transition from the long, bright days of summer—where daylight stretches to a generous 16 hours in June and July—the shift becomes evident as autumn settles in. Following October's 10 hours, November and December usher in shorter days, embracing the cozy darkness of winter. Yet, this seasonal rhythm promises a gradual return to longer days, starting with January's 8 hours as we leap into the new year, and swiftly moving towards the increasing luminosity that characterizes spring's arrival. This cyclical pattern not only highlights the natural beauty of Westport’s changing seasons but also sets the stage for the optimism of longer, sunlit days ahead.

Average Daylight Hours in Westport for December

The chart illustrates the variation in daylight duration in Westport throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 3m9h 47m11h 54m14h 4m15h 58m16h 59m16h 26m14h 43m12h 37m10h 29m8h 32m7h 29m
Data source: Westport daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Westport

As the December winds sweep across Westport, Ireland, they bring a brisk average speed of 4.9 m/s (11 mph), marking a notable increase from the calmer summer months. With wind speeds gradually rising from the gentle breezes of July at 2.7 m/s (6 mph), December reflects a transition into the winter season characterized by stronger gusts. The autumn months see a steady pattern, with increases each month, culminating in December's refreshing winds that herald the end of the year. This trend of escalating wind speeds not only enhances the coastal charm of Westport but also invites local adventurers to embrace the invigorating elements of the season.

Average December Wind Speed in Westport

The chart displays monthly wind speed patterns in Westport, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.75.74.83.63.93.92.73.63.44.44.54.9 m/s
Data source: Westport December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Westport Compares to Other Months

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

December and January share similar winter temperatures, with both months witnessing a minimum of around -3°C (27°F) and average highs reaching up to 13°C (55°F). However, January tends to be slightly cooler on average at 6°C (43°F), compared to December's 7°C (44°F). Precipitation is notably less in January, with 95 mm (3.7 in) over 14 days, compared to December's heavier rainfall of 134 mm (5.3 in) across 19 days. Humidity levels are similar, remaining high at about 88-89%. For a more in-depth look at January weather, check out Westport weather in January.

In December, temperatures in Westport typically range from a minimum of -3°C (27°F) to a maximum of 13°C (55°F), with an average of 7°C (44°F). The month sees substantial precipitation, totaling 134 mm (5.3 in) over 19 days, while humidity is relatively high at 89%. In contrast, February experiences slightly colder temperatures, with a minimum of -4°C (26°F) and a maximum of 15°C (59°F), averaging at 6°C (43°F). Precipitation increases to 144 mm (5.7 in) over the same number of rain days, and humidity remains similar at 88%. Overall, while both months are marked by cool temperatures and significant rainfall, February tends to be marginally colder yet wetter than December. For more details, check out Westport weather in February.

When comparing the weather in December and March, one can observe a significant shift as winter transitions into spring. December typically experiences a minimum temperature of -3°C (27°F), with averages around 7°C (44°F) and a maximum of 13°C (55°F). The month is characterized by high humidity at 89% and substantial precipitation, averaging 134 mm (5.3 in) over 19 days. In contrast, March features slightly lower minimum temperatures at -5°C (24°F) but offers a more favorable average of 7°C (44°F) and a higher maximum of 17°C (62°F). Precipitation decreases to 114 mm (4.5 in) over 17 days, with humidity remaining relatively high at 87%. This transition signifies longer days and milder weather as March approaches. For more detailed insights, visit Westport weather in March.

December and April present quite contrasting weather conditions. In December, temperatures range from a chilly -3°C (27°F) at night to a maximum of 13°C (55°F) during the day, with an average of 7°C (44°F). The month is also marked by significant precipitation, totaling 134 mm (5.3 in) over 19 days, and a high humidity level of 89%. In contrast, April experiences milder temperatures, with a minimum of -2°C (28°F) and a maximum of 20°C (69°F), resulting in a more pleasant average of 9°C (48°F). Rainfall is considerably less, with only 65 mm (2.6 in) over 12 days and slightly lower humidity at 86%. For a closer look at what to expect, check out Westport weather in April.

In December, temperatures in Westport can drop as low as -3°C (27°F) and average around 7°C (44°F), with a maximum reaching 13°C (55°F). The month is characterized by high humidity at 89% and significant precipitation, with 134 mm (5.3 in) over 19 days, making it a rather damp and chilly time of year. In contrast, May sees temperatures beginning to rise, with minimums around -2°C (29°F) and average highs of up to 25°C (77°F), providing a much more pleasant climate with an average of 11°C (52°F). Additionally, May experiences less precipitation at 77 mm (3.0 in) over 14 days and lower humidity levels at 83%. For more detailed information on the weather patterns in May, you can visit Westport weather in May.

December and June present striking contrasts in weather. In December, temperatures range from a chilly -3°C (27°F) to a mild 13°C (55°F), with an average of 7°C (44°F). The month sees considerable precipitation, with 134 mm (5.3 in) falling over 19 days, and humidity is high at 89%. In contrast, June warms up significantly, with minimum temperatures around 5°C (41°F) and maximums reaching 29°C (84°F), averaging 13°C (56°F). Precipitation is lower in June at 91 mm (3.6 in) over 17 days, and humidity drops slightly to 83%. For more details on the pleasant weather conditions during this month, visit Westport weather in June.

The weather in December is notably colder compared to July, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F), averaging around 7°C (44°F). In contrast, July offers much warmer conditions, with temperatures starting at a minimum of 7°C (44°F) and reaching up to 28°C (83°F), and an average of 15°C (59°F). Precipitation is fairly common in both months; however, December experiences more rainfall overall, with 134 mm (5.3 in) over 19 days compared to July's 101 mm (4.0 in) spread across 16 days. Humidity levels are similar, at 89% in December and 85% in July. For more details on July weather, you can visit Westport weather in July.

The weather in December contrasts significantly with that of August. In December, temperatures range from a chilly -3°C (27°F) to a maximum of 13°C (55°F), with a damp climate marked by 134 mm (5.3 in) of precipitation over 19 days and high humidity at 89%. In sharp contrast, August enjoys milder temperatures ranging from 6°C (43°F) to a pleasant 24°C (75°F) average, accompanied by slightly more precipitation of 144 mm (5.7 in) spread over 22 days, though with marginally lower humidity at 85%. For more details on August weather, visit Westport weather in August.

In comparing the weather between December and September, notable differences can be observed. December is considerably colder, with average temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F), while September enjoys milder conditions with temperatures between 2°C (35°F) and 25°C (77°F). Additionally, December is characterized by higher precipitation levels at 134 mm (5.3 in) over 19 days, compared to September's 101 mm (4.0 in), also spread over 19 days. Humidity remains relatively similar, with December at 89% and September at 88%. For a closer look at September's conditions, visit Westport weather in September.

In comparing the weather of December and October, we see a notable difference in temperatures and conditions. December experiences colder temperatures, with a minimum of -3°C (27°F) and an average of 7°C (44°F), while October tends to be milder, starting at a minimum of 0°C (32°F) and peaking with an average of 10°C (51°F). Precipitation levels are fairly close, with December receiving 134 mm over 19 days compared to October’s 138 mm over 21 days, but December's higher humidity at 89% gives it a colder and damp feel. For more details about October's climate, you can check out Westport weather in October.

In December, temperatures typically range from a minimum of -3°C (27°F) to a maximum of 13°C (55°F), with an average of 7°C (44°F), which marks a slight decrease compared to November’s milder conditions, where the temperatures ranged from -2°C (30°F) to 15°C (59°F) with an average of 8°C (46°F). Both months experience significant precipitation, but December sees an increase to 134 mm (5.3 in) across 19 days, compared to November's 121 mm (4.8 in) over 18 days. Additionally, humidity levels are slightly lower in December at 89% compared to November's 92%, contributing to the overall chill. The notable transition in both temperature and precipitation reflects the shift into winter. For more detailed information, you can visit Westport weather in November.

Compare Westport's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Westport

As December arrives in Westport, the weather takes a notable turn, contrasting sharply with the milder autumn months. The chill in the air becomes more pronounced, leading to temperatures that dip significantly, with frost becoming a common sight. Alongside this drop in temperature, the month is characterized by increased precipitation, contributing to a sense of greyness that envelops the town. With higher humidity levels and an array of rainy days, December truly embodies the essence of winter in Westport. For a deeper insight into what to expect throughout the year, check out the detailed information on the Westport Climate.