December Weather in Plymouth, United Kingdom

Last updated: March 17, 2025

December in Plymouth, United Kingdom offers a crisp, cool climate, with temperatures fluctuating from a maximum of 14°C (57°F) to a minimum of 4°C (39°F), averaging around 10°C (49°F). This month is characterized by high humidity levels at 89%, creating a moist atmosphere as it experiences a substantial 141 mm (5.6 in) of precipitation over an average of 20 rainy days. Whether you’re exploring the festive charm of the city or seeking shelter from the showers, Plymouth in December presents a quintessentially British winter experience.

December Temperature in Plymouth

In Plymouth, United Kingdom, December marks the transition into winter, with temperatures averaging around 10°C (49°F). The month begins with a minimum of 4°C (39°F) and can peak at a comfortable 14°C (57°F), reflecting a relatively mild climate compared to the colder transitions seen earlier in autumn. This gentle dip in temperature from November serves as a precursor to the chill of January and February, yet residents enjoy a brief respite from harsher winter conditions. Overall, December's temperatures highlight a trend of gradual cooling, inviting cozy evenings and festive cheer as the year draws to a close.

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

The chart illustrates December temperature patterns in Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec464747505359626260565149
Data source: Temperature data for Plymouth 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 Plymouth

In December, Plymouth, United Kingdom experiences a significant uptick in precipitation, with an impressive 141 mm (5.6 in) of rain falling over 20 days. This makes December not only the wettest month of the year but also highlights a trend of increasing rainfall as winter sets in. Following the typically drier months from April to July, the city sees a marked shift in weather patterns, with October and November paving the way for December's deluge. As the year draws to a close, residents can expect a heightened frequency of showers, underscoring the seasonal transition and the necessity for cozy indoor activities amidst the frequent downpours.

December Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7810293487577727873138115141
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Plymouth

In December, Plymouth, United Kingdom, experiences a high humidity level of 89%, consistent with the trend seen in the preceding months. Notably, humidity begins its gradual descent from a peak in October at 89% and remains elevated through the colder winter months. The late autumn and early winter showcase a pattern where humidity steadily hovers around the high eighties, culminating in December's slightly reduced figure, mirroring the humidity of the month prior. This consistent atmospheric moisture not only contributes to the chill in the air but also reflects Plymouth's temperate maritime climate, making it a unique place to experience winter's embrace.

December Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, 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%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Plymouth

As December rolls into Plymouth, the UV Index takes a noticeable dip, reaching a low of 1. This decrease signifies minimal risk from sun exposure, allowing residents and visitors to enjoy the outdoors without the usual precautions of higher summer months. With a burn time of 45 minutes, it’s a great time to bask in the weaker winter sun, particularly on clear days. Overall, the gradual decline from the summer highs—where levels peaked at a striking 9 in June—illustrates the seasonal trends of UV exposure, reminding us of the importance of adapting our sun safety routines throughout the year. For more detailed insights, check out the Plymouth UV Index.

Maximum UV Index Levels in Plymouth for December

The chart shows the monthly maximum UV Index (UVI) for Plymouth 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.
JanFebMarAprMayJunJulAugSepOctNovDec224679876421
Data source: Plymouth 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 Plymouth

In Plymouth, United Kingdom, December ushers in the winter chill with 121 hours of sunshine, illuminating a notable decline from the brighter months. The trend reveals a gradual buildup of daylight from January's modest 99 hours, climbing steadily to a peak in July with an impressive 428 hours. However, as the year winds down, light levels dwindle, dipping sharply in November and continuing to fall in December. This seasonal rhythm underscores Plymouth's distinctive charm, where the fleeting winter sun, despite its scarcity, adds a touch of brightness to the otherwise grey landscape. As the days shorten, residents and visitors alike eagerly await the return of longer, sunnier days in the coming year.

Monthly Sunshine Duration in Plymouth: December Highlighted

The December sunshine duration represents the total number of hours Plymouth 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.
JanFebMarAprMayJunJulAugSepOctNovDec99h160h234h358h410h408h428h392h330h262h155h121h
Data source: Plymouth December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Plymouth During December

In Plymouth, United Kingdom, the likelihood of sunny weather in December dips to just 20%, making it the least favorable month for sunshine in the region. This trend aligns with the gradual decrease in sunny days observed from October to the year's end, where October begins with a 27% chance and steadily diminishes through November's 29%. Prior to this, there is a noticeable increase in sunny probabilities during spring, with April peaking at 55%. As we move into winter, the chances of sunlight decrease significantly, suggesting that December is a time best suited for cozy indoor activities rather than outdoor adventures under the sun.

Percentage of Sunny Days in December in Plymouth

The chart illustrates the percentage of sunny days in Plymouth 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 Plymouth experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec24%25%35%55%34%30%40%32%35%27%29%20%
Data source: Plymouth December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Plymouth in December

As December unfolds in Plymouth, the daylight hours mirror the gloom of the winter months, offering just 8 hours of light each day—an echo of both November's brevity and January's early return. This trend of dwindling daylight begins in the autumn, peaking during the vibrant, sun-soaked days of June with a generous 16 hours. As the seasons transition, daylight steadily declines from this pinnacle, highlighting the rhythmic ebb and flow of the year. Interestingly, the daylight duration remains consistent and low late in the year, reminding us of the cozy allure of winter nights while we anticipate the inevitable return of longer days in spring.

Average Daylight Hours in Plymouth for December

The chart illustrates the variation in daylight duration in Plymouth throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 33m10h 3m11h 55m13h 49m15h 28m16h 20m15h 52m14h 23m12h 33m10h 40m8h 58m8h 4m
Data source: Plymouth daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Plymouth

As December arrives in Plymouth, the winds begin to pick up, with an average speed of 8.2 m/s (18 mph), marking a noticeable increase compared to the previous months. This brisk gustiness stands in contrast to the calmer summer months, where the average wind speed dipped to around 4.3 m/s (10 mph) in June. Interestingly, as the year nears its end, wind speeds tend to surge, peaking in December, reflecting a trend of seasonal intensity. Following a modest November at 5.9 m/s (13 mph), the winter chill sets in, with December's winds inviting a refreshing, invigorating ambiance that heralds the start of the new year. This transition not only enhances the coastal charm of Plymouth but also prepares the landscape for the dynamic weather patterns typical of British winters.

Average December Wind Speed in Plymouth

The chart displays monthly wind speed patterns in Plymouth, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.38.36.55.36.74.35.15.35.16.55.98.2 m/s
Data source: Plymouth December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Plymouth Compares to Other Months

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

In December, the weather typically sees a range of temperatures with a minimum of 4°C (39°F), an average of 10°C (49°F), and a maximum of 14°C (57°F). This month is marked by significant precipitation, totaling 141 mm (5.6 in) over about 20 days, along with high humidity levels of 89%. In contrast, January experiences slightly cooler temperatures, with a minimum of 2°C (36°F) and an average of 8°C (47°F), while still reaching a maximum of 14°C (57°F). Precipitation decreases notably to 78 mm (3.1 in) spread over 12 days, accompanied by a marginally lower humidity of 88%. For a more detailed look at weather patterns during this month, visit Plymouth weather in January.

December weather tends to be slightly milder compared to February, with average temperatures between 4°C (39°F) and 14°C (57°F) versus February's range of -1°C (31°F) to 13°C (55°F). December is characterized by higher precipitation levels, receiving 141 mm (5.6 in) over approximately 20 days, while February experiences less rainfall at 102 mm (4.0 in) across 15 days. Humidity levels are quite similar, with December at 89% and February at 88%. Overall, while both months are typically damp and cool, December's temperatures and precipitation make it a wetter month compared to the relatively drier February. For more detailed information on February weather specifics, check out Plymouth weather in February.

December and March in Plymouth exhibit distinct weather characteristics. While both months share a maximum temperature of 14°C (57°F), December boasts a milder average temperature of 10°C (49°F) compared to March's cooler average of 9°C (48°F). December experiences a higher minimum temperature of 4°C (39°F), while March can dip as low as -2°C (29°F). Precipitation patterns also differ; December sees a significant 141 mm (5.6 in) of rain over 20 days, whereas March has less rainfall at 93 mm (3.7 in) spread over 15 days. Humidity levels are relatively high in both months, but December (89%) is slightly more humid than March (86%). For more detailed insights into March weather, check Plymouth weather in March.

In December, the weather is noticeably chillier with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 14°C (57°F), and an average temperature of 10°C (49°F). The month experiences significant precipitation, totaling 141 mm (5.6 in) over about 20 days, contributing to a high humidity level of 89%.

In contrast, April brings slightly milder conditions, with temperatures varying from a low of 3°C (38°F) to a high of 17°C (62°F) and maintaining an average of 10°C (50°F). The rainfall is considerably less, at 48 mm (1.9 in) spread over just 8 days, and the humidity drops slightly to 84%.

For more detailed information, check out Plymouth weather in April.

In Plymouth, the weather in December showcases cooler temperatures, with average highs reaching only 14°C (57°F) and a notable minimum of 4°C (39°F). The month is characterized by significant precipitation of 141 mm (5.6 in) over approximately 20 days, contributing to a high humidity level of 89%. In contrast, May brings a more mild climate, with temperatures ranging from a minimum of 6°C (43°F) to a comfortable maximum of 19°C (67°F) and an average of 12°C (54°F). This month sees considerably less rainfall, totaling around 75 mm (2.9 in) over just 11 days, and a decrease in humidity to 80%. For more details, you can visit Plymouth weather in May.

In December, the weather is notably cooler, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 14°C (57°F). This month is characterized by high humidity at 89% and substantial precipitation, totaling 141 mm (5.6 in) over approximately 20 days. In contrast, June brings warmer temperatures, with averages from a minimum of 10°C (50°F) to a maximum of 22°C (72°F). The humidity decreases slightly to 80%, and rainfall is less frequent, accumulating 77 mm (3.0 in) over just 12 days. For more detailed information, check out Plymouth weather in June.

December weather in Plymouth is characterized by cooler temperatures, with a minimum of 4°C (39°F) and an average of 10°C (49°F), peaking at a maximum of 14°C (57°F). The month experiences significant rainfall, totaling 141 mm (5.6 in) over approximately 20 days, coupled with high humidity levels at 89%. In contrast, July offers a much warmer climate, with temperatures ranging from a minimum of 12°C (53°F) to a comfortable maximum of 24°C (75°F). Additionally, July sees less precipitation, at 72 mm (2.8 in) over only 10 days, and a lower humidity of 70%. For more detailed information, you can check Plymouth weather in July.

December and August present contrasting weather patterns, highlighting the seasonal shifts experienced throughout the year. In December, temperatures range from a chilly minimum of 4°C (39°F) to a milder maximum of 14°C (57°F), with an average of 10°C (49°F). This month sees significant precipitation, averaging 141 mm (5.6 in) over approximately 20 days, coupled with high humidity at 89%. In stark contrast, August enjoys warmer temperatures, with a minimum of 13°C (55°F) and a maximum reaching 23°C (73°F), averaging around 17°C (62°F). Precipitation is lower in August, totaling 78 mm (3.1 in) over about 12 days and accompanied by reduced humidity at 73%. For a detailed look at the weather specifics in August, check out Plymouth weather in August.

In comparing the weather between September and December, it is evident that December experiences cooler temperatures, with average highs around 10°C (49°F) compared to 15°C (60°F) in September. The minimum temperatures also drop significantly, from 10°C (50°F) in September to just 4°C (39°F) in December. Additionally, December is much wetter, with 141 mm (5.6 in) of precipitation over approximately 20 days, while September sees only 73 mm (2.9 in) across about 12 days. Humidity levels are higher in December at 89%, compared to 79% in September, contributing to a damp, chilly atmosphere during the winter month. For more detailed insights, you can explore Plymouth weather in September.

December weather tends to be cooler than October, with average temperatures dropping from 13°C (56°F) in October to 10°C (49°F) in December. While both months experience high humidity at 89%, December sees a slight increase in precipitation, totaling 141 mm (5.6 in) over 20 days compared to October's 138 mm (5.4 in) over 16 days. Consequently, December often feels more damp and chilly, making it a stark contrast to the milder and relatively more pleasant October. For more detailed insights, you can also check Plymouth weather in October.

In comparing November and December weather, we see that both months experience a similar range of temperatures, with December showing a slightly cooler average of 10°C (49°F) compared to November's 11°C (52°F). However, December is characterized by increased precipitation, with 141 mm (5.6 in) falling over 20 days, whereas November sees 115 mm (4.5 in) over 17 days. Both months have high humidity levels, but December's average humidity is marginally lower at 89% compared to November's 90%. For a more detailed look at November weather, you can visit Plymouth weather in November.

Compare Plymouth's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Plymouth

As December settles in, Plymouth experiences a distinct shift in weather compared to other months. The cooler temperatures, with an average hovering around 10°C (49°F), create a crisp atmosphere, making it one of the chillier times of the year. The high humidity level at 89% adds to the noticeable chill, while the frequent precipitation—spanning about 20 days—means that residents should be prepared for wet weather. With 141 mm (5.6 in) of rain typically falling, the month stands out as particularly damp. For those curious about how these conditions compare throughout the year, insights can be found at Plymouth Climate.