December Weather in Llanberis, United Kingdom

Last updated: March 17, 2025

In Llanberis, United Kingdom, the weather in December showcases the region's typical wintry charm. With a maximum temperature of 12°C (54°F) and an average hovering around 7°C (45°F), residents and visitors experience a brisk chill, while evenings can dip to a minimum of -2°C (29°F). This month also brings considerable precipitation, with 203 mm (8.0 in) of rainfall occurring across 24 days, resulting in a humid atmosphere with levels reaching 89%. Despite the wet conditions, Llanberis's stunning scenery is accentuated by the dramatic winter landscape, making December a unique time to explore this picturesque locale.

December Temperature in Llanberis

In Llanberis, December marks a transition into the colder winter months, with temperatures dipping compared to the preceding autumn. The minimum temperature can reach a frosty -2°C (29°F), while daytime conditions remain slightly milder, with an average of 7°C (45°F) and a maximum of 12°C (54°F). This trend highlights a notable drop as the year closes, reflecting the region's characteristic climate shift. As December progresses, Llanberis transforms into a winter wonderland, making it an ideal time for cozy indoor activities or daring outdoor adventures in the frosty air.

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

The chart illustrates December temperature patterns in Llanberis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424344475257605957524744
Data source: Temperature data for Llanberis 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 Llanberis

In December, Llanberis experiences a significant uptick in precipitation, with an impressive 203 mm (8.0 in) of rainfall occurring across 24 days. This marks the month's total as one of the highest in the annual cycle, second only to October. What stands out is not only the sheer volume of rain but also the frequency of wet days, breaking November's record of 21 days. The trend of increased precipitation during the winter months is unmistakable, as December embraces the wettest conditions of the season, setting the stage for a lush landscape in the early months of the new year.

December Precipitation Trends in Llanberis

The chart displays monthly precipitation patterns in Llanberis, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1211621526287106105162146206176203
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Llanberis

In December, Llanberis, United Kingdom, experiences humidity levels at 89%, reflecting a slight dip from the previous month’s peak of 91%. This marks a continuation of the year's trend, where humidity remains consistently high during the colder months. Starting from October's 90%, the winter months generally showcase elevated moisture content, maintaining a pattern observed throughout the year with only a few fluctuations. While the summer months see a decline, reaching a low of 78% in July, the transition back into winter brings a resurgence in humidity, hinting at the region's characteristic dampness. Overall, the data illustrates how Llanberis embraces its lush, misty ambiance as the year draws to a close, making December a quintessentially humid month.

December Average Humidity in Llanberis

This chart illustrates the average monthly humidity levels in Llanberis, 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%86%85%79%81%78%79%85%90%91%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Llanberis

In December, Llanberis experiences a UV Index of 1, indicating a low level of ultraviolet radiation. This trend follows a gradual decrease from the higher indexes observed in the summer months, where values soared to as high as 8 in June and July. As the year concludes, the chances of sunburn are quite minimal, with a safe burn time extending to 45 minutes. This makes December a favorable time for outdoor activities without the heightened concern for UV exposure. It's essential to stay informed about the UV Index, so for more details and updates, check the Llanberis UV Index.

Maximum UV Index Levels in Llanberis for December

The chart shows the monthly maximum UV Index (UVI) for Llanberis 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Llanberis 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 Llanberis

In Llanberis, December wraps up the year with a gentle descent into sunlight, totaling just 109 hours. As winter settles in, the shift from the bright embrace of summer, which boasts up to 421 hours in July, becomes evident. While the month begins with the crispness of winter, the reduction in sunshine hours mirrors the gradual fading of light seen from the optimistic blooms of spring with 335 hours in April down to the cozy confines of November's 126 hours. This trend underscores a seasonal rhythm, highlighting how the vibrant sunlight of spring and summer gives way to the quiet introspection of winter, making the rare moments of December sunshine even more cherished in this picturesque part of the UK.

Monthly Sunshine Duration in Llanberis: December Highlighted

The December sunshine duration represents the total number of hours Llanberis 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.
JanFebMarAprMayJunJulAugSepOctNovDec93h162h228h335h415h404h421h383h315h238h126h109h
Data source: Llanberis December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Llanberis During December

In December, Llanberis, United Kingdom, experiences a 20% chance of sunny weather, reflecting a consistent trend seen in the colder months. This modest likelihood mirrors the sunniest days of January and November, where the chances hover around the same percentage. As we move into the year, the sun’s prevalence begins to pick up in spring, with April reaching 46%, before gradually declining again in November and December. While the winter months lack the brightness of spring and summer, the potential for sunny days does provide a glimmer of hope amid the seasonal gloom. Embracing this opportunity for sunlight can make December in Llanberis feel a little brighter, despite its overall cool and cloudy demeanor.

Percentage of Sunny Days in December in Llanberis

The chart illustrates the percentage of sunny days in Llanberis 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 Llanberis experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%22%25%46%30%27%36%25%22%16%20%20%
Data source: Llanberis December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Llanberis in December

As December descends upon Llanberis, daylight hours dip to their lowest point of the year, with only seven hours of sunlight gracing the landscape. This marks a striking contrast to the sun-drenched days of mid-summer, where 16 hours of daylight delight residents and visitors alike. Throughout the year, the town experiences a gradual increase in daylight from the deep midwinter of December, peaking in June before starting its slow decline. Interestingly, the transition from November's fleeting eight hours to December's dwindling light highlights the seasonal ebb and flow of daylight, reflecting the shift from the vibrant colors of autumn to winter's tranquil embrace. As the days lengthen in January, the cycle begins anew, promising the return of brighter days ahead.

Average Daylight Hours in Llanberis for December

The chart illustrates the variation in daylight duration in Llanberis throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 10m9h 51m11h 54m14h15h 51m16h 50m16h 18m14h 38m12h 36m10h 31m8h 38m7h 37m
Data source: Llanberis daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Llanberis

As December sweeps into Llanberis, the winds pick up slightly, averaging 5.9 m/s (13 mph), reflecting a briskness that lingers from the previous month. This month exhibits a subtle increase in wind speed compared to the calmer summer months, where averages dropped to around 3.2 m/s (7 mph) in July. The trend showcases a gradual return to more vigorous winds, reminiscent of late autumn gusts, with January starting off the year at 5.3 m/s (12 mph). December's weather serves as a precursor to the bustling winds of early spring, encouraging adventurers and locals alike to brace themselves for the invigorating chill as they explore this picturesque landscape.

Average December Wind Speed in Llanberis

The chart displays monthly wind speed patterns in Llanberis, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.36.65.73.84.74.03.24.43.76.45.55.9 m/s
Data source: Llanberis December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Llanberis Compares to Other Months

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

In December, temperatures in Llanberis range from a low of -2°C (29°F) to a high of 12°C (54°F), with an average temperature of 7°C (45°F). The month is quite wet, receiving 203 mm (8.0 in) of precipitation over 24 days, while humidity remains consistently high at 89%. In contrast, January sees slightly milder temperatures, with minimums at -1°C (30°F) and maximums reaching 13°C (55°F), resulting in an average of 6°C (43°F). Precipitation is also reduced to 121 mm (4.8 in) over just 16 days, maintaining the same humidity level of 89%. For more specific details about January weather, you can check Llanberis weather in January.

In comparing the weather conditions of December and February, we see some subtle differences. December experiences slightly higher average temperatures, ranging from a minimum of -2°C (29°F) to a maximum of 12°C (54°F), while February has a min of -3°C (28°F) and a max of 15°C (60°F). Precipitation levels are also distinct, with December receiving 203 mm (8.0 in) over 24 days compared to February's 162 mm (6.4 in) over 19 days. Humidity levels are fairly consistent between the two months, with December at 89% and February slightly lower at 88%. For more detailed insights, you can check out this link: Llanberis weather in February.

In December, the weather in Llanberis is generally colder, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 12°C (54°F) and an average temperature of 7°C (45°F). The month typically experiences significant precipitation, totaling 203 mm (8.0 in) over 24 days, and the humidity remains quite high at 89%. In contrast, March brings a slight warming trend, with minimum temperatures dropping to -5°C (23°F) and maximum temperatures reaching 16°C (61°F), while still averaging around 7°C (44°F). Precipitation decreases to 152 mm (6.0 in) over 19 days, and the humidity is slightly lower at 86%. For more details on weather specifics, you can check out Llanberis weather in March.

In December, the weather in Llanberis is quite chilly, with temperatures ranging from a low of -2°C (29°F) to a high of 12°C (54°F). The month is characterized by significant precipitation, totaling 203 mm (8.0 in) over 24 days, accompanied by high humidity at 89%. In contrast, April ushers in milder conditions, with temperatures starting at a minimum of 0°C (33°F) and reaching up to 19°C (66°F). The precipitation decreases to 62 mm (2.4 in) over just 12 days, and humidity slightly lowers to 84%. Overall, April offers a more pleasant and drier climate compared to the cold, wet conditions of December. For more detailed information, you can check Llanberis weather in April.

December and May showcase contrasting weather patterns. In December, temperatures range from a chilly minimum of -2°C (29°F) to a maximum of 12°C (54°F), with an average of 7°C (45°F). The month sees high humidity at 89% and significant precipitation totaling 203 mm (8.0 in) over around 24 days, creating a damp and cold atmosphere. In contrast, May brings a much milder climate, with temperatures ranging from a minimum of 2°C (36°F) to a pleasant maximum of 23°C (73°F), and an average of 11°C (52°F). Precipitation drops to 87 mm (3.4 in) over 12 days, and humidity is lower at 79%, offering a more comfortable and enjoyable outdoor experience. For more insights, check out Llanberis weather in May.

December and June present quite contrasting weather patterns. In December, temperatures can drop as low as -2°C (29°F), with an average of 7°C (45°F) and a maximum reaching 12°C (54°F). Heavy precipitation is typical, amounting to 203 mm (8.0 in) over 24 days, coupled with high humidity at 89%. In contrast, June enjoys milder weather with temperatures ranging from a minimum of 7°C (46°F) to a pleasant maximum of 26°C (79°F), averaging around 14°C (57°F). Rainfall is significantly lower at 106 mm (4.2 in) over just 16 days, and humidity decreases slightly to 81%. For more details on Llanberis weather specifically in June, you can check this link: Llanberis weather in June.

In December, the weather is noticeably colder, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 12°C (54°F) and an average of 7°C (45°F). The month is also quite wet, receiving 203 mm (8.0 in) of precipitation over 24 days and a high humidity level of 89%. In contrast, July brings much milder conditions, with temperatures starting at a minimum of 9°C (48°F) and reaching up to 25°C (77°F), averaging around 15°C (60°F). The precipitation in July is significantly lower at 105 mm (4.1 in) over 15 days, accompanied by a more comfortable humidity of 78%. For more details on the weather in July, you can check Llanberis weather in July.

December and August present contrasting weather patterns, with December experiencing much colder temperatures, ranging from a chilly minimum of -2°C (29°F) to a maximum of 12°C (54°F). In contrast, August enjoys milder conditions, with temperatures ranging from a minimum of 9°C (49°F) to a pleasant maximum of 24°C (75°F). Precipitation levels are also notable; December sees 203 mm (8.0 in) of rain over 24 days, while August has slightly less, with 162 mm (6.4 in) of rainfall over 22 days. Additionally, humidity is higher in December at 89%, compared to August’s 79%. For a closer look at August's climate, you can visit Llanberis weather in August.

When comparing December and September weather, it becomes clear that December tends to be much colder, with average temperatures ranging from -2°C (29°F) to 12°C (54°F), while September boasts a much milder climate with temperatures averaging between 6°C (42°F) and 26°C (78°F). Rainfall is more significant in December, with 203 mm (8.0 in) over 24 days, compared to September's 146 mm (5.7 in) over 18 days. Additionally, December's humidity is slightly higher at 89%, whereas September's is a bit lower at 85%. For a more detailed look at September's weather, you can check Llanberis weather in September.

In comparing the weather of December and October, we see notable differences in temperature and overall conditions. December brings colder temperatures, with a minimum of -2°C (29°F) and an average of 7°C (45°F), whereas October starts off milder, featuring a minimum of 1°C (33°F) and an average of 11°C (53°F). Precipitation levels are similar, with December experiencing 203 mm (8.0 in) over 24 days, slightly less than October's 206 mm (8.1 in) across 22 days. Humidity remains high in both months, hovering around 89% in December and 90% in October. For a detailed look at the specific weather conditions in October, you can visit Llanberis weather in October.

In comparing the weather patterns of December and November, December is characterized by slightly colder temperatures, with an average of 7°C (45°F) compared to November's 8°C (48°F). December experiences a drop in minimum temperatures, reaching as low as -2°C (29°F), unlike November, which remains above freezing at a minimum of 1°C (34°F). Additionally, December sees increased precipitation, with 203 mm (8.0 in) falling over 24 days, compared to November's 176 mm (6.9 in) over 21 days. However, the humidity remains quite high in both months, with December at 89% and November at 91%. For more detailed information, you can check Llanberis weather in November.

Compare Llanberis's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Llanberis

As December sets in, Llanberis transforms into a winter wonderland. The temperatures dip noticeably compared to the milder months, with a chilly average of 7°C, while the nights can plunge to a brisk -2°C. High humidity and frequent rainfall make this month particularly damp, with rain expected on most days. This shift in weather not only nestles Llanberis under a cozy blanket of clouds but also sets the stage for a different kind of beauty, one that beckons visitors to experience the charm of Welsh winter. For a deeper look into the climate conditions throughout the year, check out Llanberis Climate.