Last updated: March 17, 2025
December in Wales, United Kingdom offers a mix of chilly temperatures and captivating winter scenery. With a maximum of 14°C (58°F) and an average of 5°C (42°F), the month showcases the crisp bite of winter, dipping to a minimum of -3°C (27°F). Visitors should prepare for the high humidity at 90%, which, coupled with 80 mm (3.1 in) of rainfall spread over 15 days, contributes to an enchanting yet damp landscape. Embrace the festive spirit and explore the lush greenery and historical sights that thrive in this wet season.
December in Wales ushers in a chilly embrace, with temperatures typically hovering between -3°C (27°F) at night and a modest 14°C (58°F) during the day. This month marks a slight dip from November's averages, as winter settles in and the landscape transforms under a potential blanket of frost. With an average temperature of 5°C (42°F), December not only continues the trend of cooler weather seen in the preceding months but also hints at the icy depths that January brings. As the year winds down, the crisp air and shorter days create a serene backdrop, perfect for those cozy evenings by the fireside, capturing the essence of a Welsh winter.
In December, Wales experiences a notable uptick in precipitation, with 80 mm (3.1 in) of rain falling over 15 days. This pattern reflects a continuation of wetter conditions often seen in late autumn, where rainfall tends to peak as the year draws to a close. Comparatively, December's precipitation aligns with the annual trend of increased rainfall during the winter months, similar to October’s 82 mm (3.2 in). The month stands out for its extended duration of wet weather, with 15 days of rain, emphasizing the region's characteristic dampness during this season. This combination of high precipitation and frequent rain days signals the arrival of winter in Wales, setting the stage for the month’s grey, drizzly charm.
As December unfolds in Wales, the humidity levels settle at 90%, reflecting a trend of elevated moisture that begins in the cooler months. Throughout the year, humidity gradually decreases from a high of 92% in November to 90% in December, showcasing a consistent pattern where late autumn and winter months remain notably damp. In fact, December maintains a close similarity to both January and October, both recorded at 90%, indicating that the season's chill is accompanied by a thick blanket of moisture. This rhythmic ebb and flow of humidity underscores the characteristic dampness of Welsh winters, inviting residents and visitors alike to embrace the cozy atmosphere that accompanies the region's unique climate.
In December, Wales experiences a low UV Index of 1, indicating minimal risk from sun exposure, which allows for a burn time of 45 minutes for unprotected skin. This trend aligns with the colder winter months, where UV levels are significantly lower, especially compared to the bustling summer months, like June and July, when the index soars to 8 and burn times drop to just 15 minutes. The gradual decline in UV levels from the bright spring and summer days to the more subdued winter months is evident, with December marking the return to safer sun exposure conditions. For a comprehensive understanding of UV trends throughout the year, visit Wales UV Index.
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In Wales, the December sunshine brings a gentle close to the year, offering an average of 96 hours of daylight. This marks a noticeable dip from the brighter months, as sunlight peaks in May with an impressive 380 hours. Following a gradual decline through the autumn, December's hours reflect the onset of winter, reminding us of the seasonal ebb and flow of daylight. Notably, the trend throughout the year shows a vibrant spring and summer, with March to August basking in the longest days, before the shorter, cozier months usher in a calm and reflective winter. As the year wraps up, December's soft light invites contemplation, making it a unique time to embrace the quieter rhythms of life in this picturesque region.
In December, the likelihood of experiencing sunny weather in Wales hovers around 20%, making it one of the least promising months for sun-seekers. This trend reflects a gradual decline in sunshine probability as winter approaches, notably dipping from the more favorable conditions seen in April at 46% and remaining low through the end of the year. While November offers a slightly better chance at 30%, the transition into December signals a notable shift towards cloudier skies and shorter days. Those braving the Welsh winter should be prepared for the rain and chill, as the month is unlikely to deliver much in the way of sunshine.
As December arrives in Wales, daylight reaches its annual low, offering a mere seven hours of light each day. This is a stark contrast to the sun-drenched heights of June and July, when daylight stretches to an impressive sixteen hours. The gradual dimming begins in November, with only eight hours of daylight, and continues through the winter months, highlighting a clear seasonal rhythm. January barely offers any respite, maintaining this trend with just eight hours again. As the year transitions from the depths of winter to spring, the days will progressively lengthen, setting the stage for the vibrant daylight of late spring and summer. This cyclical pattern not only defines the natural landscape of Wales but also shapes the rhythm of life for its residents, who eagerly anticipate the return of longer, brighter days.
As winter settles in, December in Wales experiences a brisk average wind speed of 4.6 m/s (10 mph), mirroring the gusty conditions of the preceding months. The wind speeds gradually rise from the moderate breezes of spring, peaking in October at 5.3 m/s (12 mph) before tapering off slightly as the year draws to a close. The consistent patterns reveal that while summer months linger in calmness with lower speeds, the autumn months bring a refreshing uptick, setting the stage for the invigorating chill of winter. This transition highlights Wales' dynamic weather, where each month unfolds a unique tapestry of wind, invigorating its stunning landscapes and vibrant culture.
The weather in Wales 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 Wales and find detailed weather information for every month.
December and January exhibit quite similar temperatures, with both months experiencing average highs of 14°C (58°F) and lows around -3°C (27°F) in December and -4°C (24°F) in January. However, December is characterized by more precipitation, totaling 80 mm (3.1 in) across about 15 days, compared to January’s 51 mm (2.0 in) over 10 days. Humidity levels remain consistently high at 90% for both months, leading to a damp and chilly atmosphere throughout winter. For more detailed information on January weather, you can visit Wales weather in January.
December and February exhibit similar average temperatures, both hovering around 5°C (42°F), but February tends to be slightly milder at its maximum, reaching 17°C (63°F) compared to December's 14°C (58°F). However, February starts off with a chillier minimum temperature of -5°C (23°F), while December's minimum is -3°C (27°F). Precipitation levels are also lower in February, with a total of 67 mm (2.6 in) over 12 days, compared to December's 80 mm (3.1 in) across 15 days. Additionally, humidity remains high in both months, at 90% for December and slightly lower at 88% for February. For a more detailed look at February weather, visit Wales weather in February.
December and March present contrasting weather patterns. In December, temperatures range from a chilly -3°C (27°F) at night to a mild 14°C (58°F) during the day, with an average of 5°C (42°F). The month is characterized by high humidity at 90% and significant precipitation, averaging 80 mm (3.1 in) over 15 days. In contrast, March sees slightly colder mornings with a minimum of -7°C (20°F) but warms up significantly during the day, reaching a maximum of 20°C (68°F) and an average of 7°C (44°F). This month features less rainfall at 68 mm (2.7 in) across 13 days, and slightly lower humidity at 86%. For more detailed climate insights, you can visit Wales weather in March.
December weather is characterized by cooler temperatures, with a minimum of -3°C (27°F) and an average high of only 14°C (58°F), contributing to a chilly atmosphere. Precipitation is more frequent during December, with about 80 mm (3.1 in) falling over 15 days, and the humidity levels are high at 90%. In contrast, April sees a noticeable warming trend, with temperatures rising to an average high of 25°C (77°F). Although it still experiences some rainfall, total precipitation decreases to 40 mm (1.6 in) over just 7 days, and the humidity is slightly lower at 84%. For a deeper look into April's weather patterns, you can explore Wales weather in April.
December and May present stark contrasts in weather patterns. December typically experiences temperatures ranging from a chilling -3°C (27°F) at its lowest to a mild 14°C (58°F) at its warmest, accompanied by high humidity levels of around 90%. With precipitation averaging 80 mm over 15 days, it’s common for the month to feel quite damp and chilly. In contrast, May enjoys a more pleasant climate, with temperatures starting from 0°C (32°F) and climbing to a maximum of 25°C (78°F), averaging around 12°C (53°F). Although May sees some rainfall as well, amounting to 64 mm over 13 days, the overall humidity is slightly lower at 80%, offering a more comfortable atmosphere. For more detailed information about the weather in May, you can check Wales weather in May.
December weather contrasts sharply with that of June. In December, temperatures range from a chilly -3°C (27°F) at night to a mild 14°C (58°F) during the day, with an average of 5°C (42°F). The month experiences high humidity at 90% and about 80 mm (3.1 in) of precipitation over 15 days, giving it a damp and cold atmosphere. In contrast, June welcomes warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 29°C (84°F), averaging around 15°C (59°F). This month sees a similar total precipitation of 80 mm (3.1 in), but over fewer days—just 13—along with lower humidity at 81%, resulting in a much more pleasant and comfortable climate. For more specifics on June conditions, refer to Wales weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures can dip as low as -3°C (27°F) and average around 5°C (42°F), while they climb significantly in July, where minimums start at 7°C (45°F) and average at 17°C (63°F), peaking at a warm 35°C (95°F). Both months receive similar amounts of precipitation, roughly 80 mm (3.1 in), but December has more rainy days (15) compared to July's 12, contributing to a higher humidity level of 90% in winter versus 76% in summer. This contrast highlights December's colder, damp atmosphere compared to the warm, more comfortable days of July. For more insights into July weather, check this link: Wales weather in July.
December and August present strikingly different weather patterns. In December, temperatures can drop as low as -3°C (27°F) and reach a maximum of 14°C (58°F), with an average of 5°C (42°F). The month experiences about 80 mm (3.1 in) of precipitation over 15 days, and humidity levels are high at 90%. In contrast, August offers a much warmer climate, with minimums of 8°C (47°F) and highs soaring to 32°C (90°F), averaging around 16°C (62°F). Precipitation is slightly lower at 77 mm (3.0 in) over 12 days, and the humidity is more comfortable at 77%. For more details on the weather during this summer month, check out Wales weather in August.
In comparing the weather between December and September, we can see notable differences in temperature and humidity. December typically experiences colder temperatures, with averages around 5°C (42°F), while September enjoys milder conditions, with average temperatures reaching 14°C (57°F) during the day. Additionally, the maximum temperatures in December peak at 14°C (58°F), whereas September can soar up to 28°C (83°F). Precipitation levels are also slightly higher in December, with about 80 mm (3.1 in) over 15 days compared to September's 63 mm (2.5 in) across 11 days. Humidity is relatively high in both months—90% in December and 85% in September—adding to the overall dampness often associated with fall and winter weather. For more details on the climate during this season, you can check Wales weather in September.
December weather is generally colder than that of October, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 14°C (58°F), while October showcases a milder temperature range from 0°C (32°F) to 23°C (73°F). Although both months experience similar levels of precipitation—with December receiving 80 mm (3.1 in) over 15 days and October slightly more at 82 mm (3.2 in) over 14 days—the chill in December makes the wet days feel much more biting. Additionally, both months have a high humidity of 90%, but the colder temperatures in December often lead to a sharper, more invigorating feel in the air compared to the crispness of October. For a detailed look at October weather, you can visit Wales weather in October.
In comparing the weather of December to that of November, we see that December tends to be slightly warmer overall, with an average temperature of 5°C (42°F) compared to November's 7°C (45°F). However, December experiences colder minimum temperatures, dipping to a low of -3°C (27°F) versus November's -4°C (26°F). Precipitation levels are higher in December, totaling 80 mm (3.1 in) over 15 days, compared to November's 65 mm (2.5 in) over 12 days. Humidity remains consistently high in both months, with December at 90% and November at 92%. For more details, you can check out the Wales weather in November.
As December blankets Wales in its chilly embrace, the weather stands out from the milder months that precede it. The average temperatures dip significantly, inviting a crispness that contrasts sharply with the gentler warmth of autumn. With higher humidity levels and persistent rainfall, this month brings its fair share of grey skies, encouraging cozy indoor pursuits and festive celebrations. The frequent precipitation serves to nourish the lush Welsh landscapes, even as the temperatures flirt with the edge of winter. Embrace the unique charm of December in Wales, where the atmosphere is rich and the beauty of nature reveals itself in its twilight hues. For more insights into the seasonal variations, check out Wales Climate.