December Weather in Porthleven, United Kingdom

Last updated: March 17, 2025

December in Porthleven, United Kingdom, offers a chilly yet captivating coastal experience. With average temperatures hovering around 10°C (50°F), residents and visitors alike can expect a maximum of 14°C (58°F) and a crisp minimum of 4°C (39°F). The month brings significant rainfall, accumulating to 123 mm (4.8 in) over approximately 19 days, making waterproof gear essential. Humidity levels climb to a notable 81%, contributing to the brisk maritime atmosphere. While the weather may deter some, the charm of Porthleven’s winter landscape and the cozy local pubs invite exploration and enjoyment during this vibrant time of year.

December Temperature in Porthleven

In Porthleven, United Kingdom, December ushers in cooler temperatures, with minimums averaging around 4°C (39°F) and highs peaking at 14°C (58°F). This month balances a crisp chill with a mild daytime warmth, reflected in its average of 10°C (50°F). As the year draws to a close, December's temperatures signify a gradual drop from November's milder climate, emphasizing the shift into winter. Interestingly, while the minimum temps hover just above freezing, the transition from the brisk conditions of early winter to the more temperate charm of late autumn is palpable, making it a cozy time to experience the charming coastal village.

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

The chart illustrates December temperature patterns in Porthleven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec474848505459636260565250
Data source: Temperature data for Porthleven 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 Porthleven

December in Porthleven, United Kingdom, ushers in the winter season with its highest precipitation levels of the year, averaging 123 mm (4.8 in) over 19 days. This significant rainfall marks a stark contrast to the drier months earlier in the year, particularly April, which sees just 45 mm (1.8 in) over only 8 days. The trend of increasing precipitation culminates in the final month, following a consistent rise from October’s 120 mm (4.7 in) and November’s 102 mm (4.0 in). As the clouds gather and days become increasingly damp, December stands out as a reminder of Porthleven's maritime climate, where gentle drizzles and heavier downpours create a picturesque, albeit soggy, winter landscape.

December Precipitation Trends in Porthleven

The chart displays monthly precipitation patterns in Porthleven, 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.
JanFebMarAprMayJunJulAugSepOctNovDec739085466474705764120102123
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Porthleven

In Porthleven, United Kingdom, December sees a humidity level of 81%, marking a subtle decline as the year draws to a close. This decrease reflects a slight dip from the consistently higher levels experienced during the late summer and early autumn months, where humidity remained steady at 84% to 85%. Throughout the year, humidity levels have hovered in the high 80s, particularly peaking in May and June, which generally herald the warmest and most humid conditions. As winter approaches, the gradual fall in humidity may offer a refreshing change, but Porthleven's coastal climate ensures that some humidity lingers, creating a unique blend of crisp air and lingering moisture typical of the season.

December Average Humidity in Porthleven

This chart illustrates the average monthly humidity levels in Porthleven, 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.
JanFebMarAprMayJunJulAugSepOctNovDec81%84%82%83%85%85%85%85%84%84%82%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Porthleven

In December, Porthleven, United Kingdom experiences a UV Index of 1, categorizing it as a low exposure risk. This signifies a shift from the more intense UV levels seen earlier in the year, with burn times extending to 45 minutes before noticeable skin damage occurs. As winter settles in, the UV Index trends lower from the summer highs of 9 in June and 8 in both July and August, where sun safety becomes a major concern. The transition through the seasons highlights the importance of adapting sun protection measures, even in the cooler months. For more information about the UV Index in Porthleven, visit Porthleven UV Index.

Maximum UV Index Levels in Porthleven for December

The chart shows the monthly maximum UV Index (UVI) for Porthleven 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.
JanFebMarAprMayJunJulAugSepOctNovDec234679886421
Data source: Porthleven 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 Porthleven

In Porthleven, United Kingdom, December brings a noticeable dip in sunshine hours, with a modest 118 hours of bright days. As the year draws to a close, this month contrasts sharply with the sun-soaked peaks of the summer, where July dazzles with an impressive 427 hours. The year begins tentatively, with January catching only 94 hours of sunlight, gradually building towards spring. As daylight waxes in the warmer months, sunshine hours reach a delightful crescendo in May and June. However, just as autumn sets in, there’s a marked decline, leading us to December's twilight. This seasonal rhythm highlights Porthleven’s journey from the warmth of summer to the serene splendor of winter, embracing both the highs and lows of its climate while reminding us of the cozy charm that December brings.

Monthly Sunshine Duration in Porthleven: December Highlighted

The December sunshine duration represents the total number of hours Porthleven 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.
JanFebMarAprMayJunJulAugSepOctNovDec94h156h235h354h407h403h427h387h330h261h156h118h
Data source: Porthleven December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Porthleven During December

In Porthleven, December tends to wrap up the year with a modest 20% chance of sunny weather. This marks the continuation of a noticeable decline in sunshine probabilities as autumn transitions into winter, with November also sitting low at 24%. This trend, characterized by a significant dip from the more vibrant 51% in April, suggests that residents and visitors alike should brace for a shadier month. As the year unfolds, a clear seasonal pattern emerges—while spring and summer boast more promising chances for sunshine, the dimmer December days remind us that winter has firmly established its hold on this charming coastal town.

Percentage of Sunny Days in December in Porthleven

The chart illustrates the percentage of sunny days in Porthleven 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 Porthleven experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec27%24%34%52%38%31%40%33%33%30%24%20%
Data source: Porthleven December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Porthleven in December

In Porthleven, United Kingdom, the daylight duration follows a predictable seasonal rhythm, peaking in the summer and dipping during the winter months. As December arrives, the days have shortened significantly, offering only 8 hours of daylight—the same as January. This trend reveals a gradual decrease from the vibrant 15 hours in May and a gradual decline through the autumn months, marking a transition towards the cold season. The extended hours of daylight in late spring and early summer gradually taper off, reflecting the natural polarities of the seasons and inviting residents to embrace the cozy charm of winter evenings in this picturesque coastal town.

Average Daylight Hours in Porthleven for December

The chart illustrates the variation in daylight duration in Porthleven throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 35m10h 4m11h 55m13h 48m15h 26m16h 17m15h 50m14h 22m12h 33m10h 41m9h8h 7m
Data source: Porthleven daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Porthleven

As December arrives in Porthleven, the wind picks up noticeably, averaging 8.4 m/s (19 mph), making it one of the windiest months of the year. This increase is a stark contrast to the gentle breezes of early summer, where winds dip to lows of 4.6 m/s (10 mph) in June. Following the trend seen in late autumn, winds remain relatively strong in November, but December marks a significant uptick as the year draws to a close. The heightened winds suggest that Porthleven is bracing itself for the winter months, inviting both locals and visitors to embrace the rugged charm of the coastal landscape. This seasonal shift not only influences the weather but also sets the stage for a lively atmosphere amid the town’s picturesque harbor.

Average December Wind Speed in Porthleven

The chart displays monthly wind speed patterns in Porthleven, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.08.46.65.66.94.65.35.35.16.55.88.4 m/s
Data source: Porthleven December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Porthleven Compares to Other Months

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

December and January showcase similar overall weather patterns, yet there are notable differences. In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 14°C (58°F), with an average of 10°C (50°F). The month is relatively wetter, accumulating 123 mm (4.8 in) of precipitation over 19 days, while humidity remains steady at 81%. In contrast, January experiences slightly cooler temperatures, with a minimum of 2°C (36°F) and an average of 8°C (47°F), peaking at 15°C (58°F). January is notably drier, seeing only 73 mm (2.9 in) of precipitation over 12 days, yet the humidity level remains constant at 81%. For more detailed insights on the weather, check out Porthleven weather in January.

In December, the weather tends to be milder but wetter, with average temperatures ranging from 4°C (39°F) to a maximum of 14°C (58°F) and experiencing about 123 mm (4.8 in) of precipitation over 19 days. The humidity levels are relatively high at 81%. In contrast, February sees slightly cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 13°C (56°F), but less precipitation overall at 90 mm (3.5 in) across 15 days, accompanied by a humidity level of 83%. For a more detailed look at February's conditions, check out Porthleven weather in February.

In comparing the weather of December and March, we see notable differences in temperature and precipitation. December features a milder average temperature of around 10°C (50°F) with minimums of 4°C (39°F), while March brings cooler conditions, with minimum temperatures dropping to -2°C (28°F). Both months experience a maximum temperature of 14°C (58°F), but March tends to have less precipitation, averaging 85 mm (3.4 in) over 16 days compared to December's 123 mm (4.8 in) across 19 days. Humidity levels are relatively similar, with December at 81% and March slightly higher at 82%. For more detailed weather insights in March, you can refer to Porthleven weather in March.

When comparing the weather in December and April, both months show similar average temperatures, with December averaging 10°C (50°F) and April maintaining the same average. However, December is characterized by cooler maximum temperatures, peaking at 14°C (58°F), while April sees warmer highs of 18°C (64°F). Precipitation also varies significantly; December experiences about 123 mm (4.8 in) over 19 days, making it much wetter than April, which has only 45 mm (1.8 in) of rain spread across 8 days. Humidity levels remain quite close, with December at 81% and April slightly higher at 83%. These differences create a notable contrast between the two months in terms of overall comfort and weather conditions. For more detailed insights, you can check Porthleven weather in April.

In December, the weather is cooler, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 14°C (58°F) and an average of 10°C (50°F). This month also sees considerable rainfall, totaling 123 mm (4.8 in) across 19 days, contributing to a high humidity level of 81%. In contrast, May offers a warmer climate with minimum temperatures at 6°C (42°F) and maximums reaching 20°C (68°F), averaging around 12°C (54°F). Rainfall significantly decreases to 64 mm (2.5 in) over just 11 days, while humidity remains relatively high at 85%. For a clearer picture of what to expect, you can check out Porthleven weather in May.

December and June present strikingly different weather patterns. In December, temperatures range from a chilly 4°C (39°F) to a mild 14°C (58°F), with an average of 10°C (50°F). This month also sees significant rainfall, with 123 mm (4.8 in) across about 19 days and a high humidity level of 81%. In contrast, June enjoys warmer temperatures, with a minimum of 10°C (50°F) and a maximum of 23°C (75°F), averaging around 15°C (59°F). Rainfall is less frequent in June, totaling 74 mm (2.9 in) over 11 days, and humidity rises slightly to 85%. For more details on June weather, you can visit Porthleven weather in June.

When comparing the weather in December and July, notable differences emerge. December experiences cooler temperatures with a minimum of 4°C (39°F) and an average of 10°C (50°F), while July is much warmer, boasting a minimum of 12°C (53°F) and an average of 17°C (63°F). Precipitation is more frequent in December with 123 mm (4.8 in) over 19 days, compared to July's 70 mm (2.8 in) over just 10 days. Additionally, December's humidity stands at 81%, slightly lower than July's 85%, making both months relatively damp but with July feeling more humid. For more details on July weather, you can check Porthleven weather in July.

December and August present contrasting weather patterns, with December characterized by cooler temperatures and higher precipitation. In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 14°C (58°F), with an average of 10°C (50°F) and considerable rainfall totaling 123 mm (4.8 in) over 19 days. In contrast, August enjoys milder conditions, with temperatures ranging from a minimum of 12°C (54°F) to a pleasant maximum of 22°C (72°F), averaging around 17°C (62°F). The month experiences significantly less rainfall, about 57 mm (2.3 in) over 11 days, and slightly higher humidity at 85%. For a deeper look at August's weather specifics, visit Porthleven weather in August.

In comparing December and September weather, December is notably colder, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 14°C (58°F), while September enjoys milder conditions, with temperatures ranging from 10°C (50°F) to 22°C (72°F). Additionally, December experiences more precipitation, averaging 123 mm (4.8 in) over 19 days, compared to September’s 64 mm (2.5 in) over 12 days. Both months have high humidity levels, but September is slightly higher at 84%, compared to December's 81%. For a more detailed look at September weather, check Porthleven weather in September.

When comparing the weather in December and October, we see some notable differences. December tends to be chillier, with average temperatures around 10°C (50°F) compared to October's warmer average of 13°C (56°F). Additionally, while both months experience significant rainfall, December has slightly more precipitation at 123 mm (4.8 in) over 19 days, compared to October's 120 mm (4.7 in) over 14 days. Humidity is also high in both months, but it is marginally lower in December at 81%, compared to October's 84%. For more detailed insights, you can check Porthleven weather in October.

In comparing the weather between December and November, December tends to be slightly cooler, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 14°C (58°F), compared to November's 5°C (40°F) to 16°C (61°F). December also sees an increase in precipitation, reaching 123 mm (4.8 in) over 19 days, while November experiences 102 mm (4.0 in) across 16 days. The humidity levels remain relatively similar, with December at 81% and November at 82%. For a more detailed look at November's weather, you can visit Porthleven weather in November.

Compare Porthleven's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Porthleven

As December arrives in Porthleven, the weather showcases a distinctive character compared to other months, marked by the chill of winter with temperatures averaging around 10°C (50°F) and dipping to a minimum of 4°C (39°F). Frequent rain transforms the landscape, resulting in approximately 123 mm of precipitation over 19 days, contributing to the town's lush surroundings. The high humidity at 81% further enhances the brisk atmosphere, making it a time of both coziness and contemplation as the year draws to a close. For a deeper insight into Porthleven's weather patterns, visit Porthleven Climate.