December Weather in Swanage, United Kingdom

Last updated: March 17, 2025

December in Swanage, United Kingdom offers a brisk coastal experience with average temperatures hovering around 9°C (49°F). The month witnesses maximum highs of 14°C (57°F) and minimum lows dipping to 3°C (38°F), creating a chilly yet inviting atmosphere. With 129 mm (5.1 in) of rain spread over 17 days, the air is rich with humidity at an impressive 92%, making it a perfect time for those who enjoy the refreshing bite of winter weather. Swanage's December charm is enhanced by its crisp air and occasional festive cheer, promising a unique and vibrant seaside escape.

December Temperature in Swanage

As December sets in, Swanage, United Kingdom, experiences a gentle transition into winter, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 14°C (57°F). The average temperature hovers around 9°C (49°F), reflecting a slight drop from the milder autumn months. This trend of gradual cooling is consistent as the year winds down, marking December as one of the colder months, yet still relatively mild compared to the bitter chill often felt in January and February. Visitors can expect crisp days perfect for leisurely strolls along the stunning coastline, wrapped in cozy layers but not entirely deterred by the chill. Overall, December in Swanage strikes a balance—just cold enough to embrace the season without the harshness of deep winter.

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

The chart illustrates December temperature patterns in Swanage, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec464647495458636361575249
Data source: Temperature data for Swanage 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 Swanage

In December, Swanage experiences a notable uptick in precipitation, with an average of 129 mm (5.1 in), making it one of the rainiest months of the year. This increase is accompanied by 17 days of rainfall, which aligns with the patterns seen in the preceding months of October and November, where precipitation levels were also elevated at 137 mm (5.4 in) and 106 mm (4.2 in), respectively. The damp conditions reflect the region’s transition into winter, contrasting sharply with the much drier months of April, which saw only 36 mm (1.4 in) of rainfall across just six days. As the year closes, the substantial December rains reinforce the idea that Swanage is particularly prone to wet weather during the winter season, making it a cozy backdrop for festive celebrations—just be sure to keep an umbrella handy!

December Precipitation Trends in Swanage

The chart displays monthly precipitation patterns in Swanage, 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.
JanFebMarAprMayJunJulAugSepOctNovDec737574365569467154137107129
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Swanage

As December arrives in Swanage, United Kingdom, humidity levels remain notably high, consistently matching November’s 92%. This marks the tail end of a year characterized by elevated moisture in the air, with winter months seeing some of the highest humidity readings. Following a gradual decline from the summer's 71% in July, humidity levels have climbed back up, emphasizing the dampness typical of this coastal region during the colder months. Interestingly, while other months show a slight decrease from late spring to summer, December's saturation suggests that the winter chill is accompanied by a blanket of humidity, a reminder of the maritime climate that defines Swanage.

December Average Humidity in Swanage

This chart illustrates the average monthly humidity levels in Swanage, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Swanage

In Swanage, United Kingdom, December heralds the arrival of lower UV exposure, boasting an index of 1, which falls into the low exposure category. As the seasons shift, the trend shows a gradual decline in UV intensity from the vibrant summer months, reaching its peak in July and August with values of 8 indicating very high exposure. By December, locals and visitors can enjoy the outdoors with minimal risk of sunburn, as it takes about 45 minutes of midday sun before burning occurs. This dramatic seasonal ebb reflects the general pattern of UV radiation in Swanage, emphasizing the importance of sun safety during high-exposure months while allowing for comfortable outdoor activities in the colder season. For more detailed information, visit the complete guide at Swanage UV Index.

Maximum UV Index Levels in Swanage for December

The chart shows the monthly maximum UV Index (UVI) for Swanage 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.
JanFebMarAprMayJunJulAugSepOctNovDec234678876421
Data source: Swanage 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 Swanage

In Swanage, United Kingdom, December brings a quaint charm, with 124 hours of sunshine welcoming the winter season. While the month marks a notable dip in daylight, the trend of sunshine hours reflects a gradual rise from the depths of winter, beginning with 107 hours in January and peaking in the vibrant heights of summer. The steady increase through the spring months, culminating in 414 hours in May and 435 hours in July, showcases Swanage's transformation into a sun-soaked coastal retreat. As autumn sets in, the sunshine hours graciously taper, leading into December's crisp and cozy atmosphere. Despite the reduced sunlight, the natural beauty of Swanage shines through, inviting locals and visitors to embrace the seasonal serenity.

Monthly Sunshine Duration in Swanage: December Highlighted

The December sunshine duration represents the total number of hours Swanage 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.
JanFebMarAprMayJunJulAugSepOctNovDec107h152h232h354h414h416h435h395h333h262h169h124h
Data source: Swanage December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Swanage During December

In Swanage, December weather presents a notable decrease in sunny days, with the likelihood of sunshine dipping to 22%. This marks one of the lowest points in the year, reflecting a sharp contrast to the more promising spring months when the chance of sunshine peaks at 59% in April. As the year progresses from the vibrant hues of late spring into the chill of winter, the overall trend suggests that while sunshine becomes scarce, the transition is accompanied by the festive charm of the season. Thus, December may see fewer sun-soaked moments, but it remains a time for cozy gatherings and the joy of holiday celebrations amidst the crisp coastal air.

Percentage of Sunny Days in December in Swanage

The chart illustrates the percentage of sunny days in Swanage 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 Swanage experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec21%26%40%59%42%31%45%36%37%30%37%22%
Data source: Swanage December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Swanage in December

As the year winds down in Swanage, United Kingdom, December witnesses a return to shorter days, with daylight lasting around 8 hours, reminiscent of the dim light experienced in November. This drop in daylight follows a gradual increase from the depths of winter in January to the vibrant brightness of June, where daylight peaks at a generous 16 hours. As summer gives way to autumn, the daylight duration gradually decreases, creating a natural rhythm that echoes the changing seasons. This cyclical phenomenon showcases the charm of seasonal variation, inviting residents and visitors alike to appreciate the cozy embrace of winter evenings as daylight retreats.

Average Daylight Hours in Swanage for December

The chart illustrates the variation in daylight duration in Swanage throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 31m10h 2m11h 55m13h 50m15h 30m16h 22m15h 54m14h 25m12h 34m10h 39m8h 57m8h 2m
Data source: Swanage daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Swanage

As the year winds down in Swanage, December brings with it an average wind speed of 8.0 m/s (18 mph), mirroring the brisk conditions of January. This month marks a return to higher gusts after a gradual decline through the summer, when winds were softer and more mellow, averaging around 4.6 m/s (10 mph) in June. Throughout the fall, wind speeds began to pick up again, reaching 6.7 m/s (15 mph) in November. The December breeze, then, offers a refreshing reminder of winter's onset, much like January's similar gusts, suggesting a seasonal cycle of energetic winds that invigorate this charming coastal town.

Average December Wind Speed in Swanage

The chart displays monthly wind speed patterns in Swanage, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8.08.46.85.46.94.65.26.15.77.56.78.0 m/s
Data source: Swanage December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Swanage Compares to Other Months

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

December and January exhibit similar cool temperatures, with December slightly warmer, showcasing a minimum of 3°C (38°F) and an average of 9°C (49°F), compared to January's minimum of 2°C (36°F) and average of 8°C (46°F). Precipitation is more prominent in December, with 129 mm (5.1 in) over 17 days, contrasting with January's 73 mm (2.9 in) over just 11 days. Humidity levels remain high in both months, though December is marginally higher at 92% compared to January's 91%. For a closer look at January weather patterns, you can check Swanage weather in January.

December and February present notably different weather patterns. In December, temperatures typically range from a minimum of 3°C (38°F) to a maximum of 14°C (57°F), with an average of 9°C (49°F). This month experiences heavier rainfall, with total precipitation of 129 mm (5.1 in) spread over 17 days and high humidity at 92%. In contrast, February sees slightly cooler temperatures, with a range from 0°C (32°F) to 12°C (55°F) and an average of 8°C (47°F). Precipitation decreases significantly to 74 mm (2.9 in) over 13 days, and humidity is moderately lower at 89%. For more detailed information, you can check the Swanage weather in February.

In December, the weather tends to be milder with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 14°C (57°F), accompanied by significant precipitation of 129 mm (5.1 in) over 17 days, and high humidity at 92%. In contrast, March experiences cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 12°C (55°F), along with less precipitation at 74 mm (2.9 in) over 14 days, and slightly lower humidity at 86%. For a more detailed look at what to expect, check out Swanage weather in March.

December and April present distinct weather patterns despite having similar minimum temperatures. In December, the average temperature hovers around 9°C (49°F), with a maximum reaching 14°C (57°F), accompanied by significant precipitation of 129 mm (5.1 in) over 17 days, creating a damp and humid atmosphere with humidity levels at 92%. In contrast, April experiences slightly warmer temperatures, peaking at 16°C (61°F) while maintaining an average of 9°C (49°F) and a minimal precipitation of 36 mm (1.4 in) over just 6 days, resulting in lower humidity at 85%. This makes April generally clearer and more pleasant than the wetter, chillier conditions of December. For more information on April's weather in Swanage, you can visit Swanage weather in April.

December weather is characterized by cooler temperatures, with a minimum of 3°C (38°F) and an average of 9°C (49°F), peaking at a maximum of 14°C (57°F). The month is also quite wet, receiving 129 mm (5.1 in) of rain over 17 days, and features high humidity at 92%. In contrast, May brings milder conditions, starting with a minimum of 6°C (43°F) and reaching an average of 12°C (54°F), with highs of 19°C (67°F). The precipitation in May drops significantly to 55 mm (2.1 in) across just 9 days, along with lower humidity at 79%. For a detailed overview of May's weather, you can visit this link: Swanage weather in May.

December and June present stark contrasts in weather. In December, temperatures can drop to a chilly minimum of 3°C (38°F) and reach an average of 9°C (49°F), peaking at 14°C (57°F). Additionally, the month is characterized by significant rainfall, with about 129 mm (5.1 in) of precipitation spread over 17 days and a high humidity level of 92%. In contrast, June showcases much milder conditions with minimum temperatures of 11°C (51°F) and average highs reaching 20°C (68°F). Precipitation is also notably lower at 69 mm (2.7 in), occurring over just 9 days, and humidity drops to 80%, creating a more comfortable and pleasant atmosphere. For more detailed weather information, visit Swanage weather in June.

When comparing December and July weather, notable differences emerge in temperature and precipitation. December is much cooler, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 14°C (57°F), while July enjoys warmer temperatures, averaging between 13°C (56°F) and 21°C (71°F). Additionally, December experiences significantly higher precipitation, with 129 mm (5.1 in) falling over 17 days, compared to just 46 mm (1.8 in) over 8 days in July. The humidity levels also reflect this contrast, standing at 92% in December versus 71% in July. For more details, you can check out Swanage weather in July.

December and August present markedly different weather conditions. In December, temperatures range from a chilly minimum of 3°C (38°F) to a mild maximum of 14°C (57°F), with an average of 9°C (49°F). The month sees significant precipitation, totaling 129 mm (5.1 in) over 17 days, accompanied by high humidity levels of 92%. In sharp contrast, August enjoys warmer conditions, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 24°C (75°F), and an average of 17°C (63°F). Precipitation drops to 71 mm (2.8 in) over just 9 days, and humidity is notably lower at 76%. For more detailed insights, check out Swanage weather in August.

In comparing the weather between December and September, December experiences significantly cooler temperatures, with average highs around 14°C (57°F) compared to September's more mild averages peaking at 21°C (71°F). The minimum temperatures in December also drop to around 3°C (38°F), contrasting sharply with September’s warmer lows of 11°C (52°F). Additionally, December is much wetter, with 129 mm (5.1 in) of precipitation over 17 days, while September has a much lighter rainfall of 54 mm (2.1 in) spread over just 9 days. The humidity in December is also higher, averaging 92%, compared to September's 82%. For more details on September weather, you can check Swanage weather in September.

In comparing the weather of December and October, December tends to be cooler with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 14°C (57°F), while October experiences milder conditions, with temperatures ranging from 6°C (43°F) to 19°C (67°F). Both months have a similar amount of precipitation, with December receiving about 129 mm (5.1 in) and October slightly higher at 137 mm (5.4 in), each spread over 17 days. Additionally, December's humidity is slightly higher at 92% compared to October's 90%, contributing to a more damp and chilly atmosphere. For more detailed insights, you can explore Swanage weather in October.

In comparing December and November, we see a slight drop in average temperatures, with December averaging 9°C (49°F) compared to November's 11°C (52°F). Both months have similar minimum temperatures of 3°C (38°F), but November enjoys a higher maximum of 16°C (61°F) versus December's maximum of 14°C (57°F). Precipitation is more frequent in December, with 129 mm (5.1 in) falling over 17 days, while November sees 106 mm (4.2 in) across 16 days. Interestingly, humidity remains consistent at 92% for both months, contributing to the dampness typical of this time of year. For a more detailed look at November's weather, you can refer to Swanage weather in November.

Compare Swanage's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Swanage

In December, Swanage experiences a distinct shift in weather compared to other months, as temperatures hover around a cool 9°C (49°F), with chilly lows that can dip to 3°C (38°F). This month is characterized by a relatively high humidity of 92% and frequent rain, with precipitation occurring on 17 days, contributing to a total of 129 mm (5.1 in) of rainfall. These conditions create a brisk atmosphere, ideal for cozy winter walks along the stunning coastline. For a more detailed understanding of climate patterns throughout the year, visit Swanage Climate.