January Weather in Plymouth, United Kingdom

Last updated: March 17, 2025

January in Plymouth, United Kingdom, offers a chilly yet picturesque winter experience, with average temperatures hovering around 8°C (47°F). Daily highs can reach up to 14°C (57°F), providing brief moments of respite from the winter's chill. However, temperatures can drop as low as 2°C (36°F), reminding residents and visitors alike of the season's bite. January sees 78 mm (3.1 in) of rainfall spread across 12 days, contributing to the city's lush, green landscape. With a high humidity level of 88%, the air carries a crispness that invigorates and refreshes. Whether exploring coastal paths or cozying up in local cafes, Plymouth embraces winter's beauty this January.

January Temperature in Plymouth

In Plymouth, United Kingdom, January's temperatures mark the heart of winter, with the average daily temperature hovering around 8°C (47°F). The month begins with chilly nights, showing minimums of about 2°C (36°F), while the daytime highs can reach a mild 14°C (57°F). This trend of moderate conditions continues into February, where temperatures dip slightly, revealing a minimum of -1°C (31°F). As winter transitions into spring, March and April bring subtle warmth, with average temperatures gradually increasing, peaking at 10°C (50°F) in April. This upward trend signals a slow but steady approach to milder days ahead, as the seasons shift towards the vibrant warmth of summer.

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

The chart illustrates January 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.

January Precipitation in Plymouth

In January, Plymouth experiences an average precipitation of 78 mm (3.1 in) over 12 days, signaling the arrival of winter’s wet embrace. This marks a peak in rainfall compared to the subsequent months, with February seeing a substantial increase to 102 mm (4.0 in) over 15 days, highlighting a tendency for wetter conditions to persist early in the year. As the season transitions, precipitation levels gradually decline, with April receiving a mere 48 mm (1.9 in) across just 8 days. Overall, the first month of the year sets a pattern of fluctuating rainfall, establishing a framework for the wetter days to come in late autumn, where monthly totals soar to 138 mm (5.4 in) in October. The trend suggests a cycle where winter and early spring are notably wetter, while late spring and summer bring a reprieve, only for fall to reclaim its rainy status again.

January Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, with values for each month alongside January's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec7810293487577727873138115141
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Plymouth

In January, Plymouth typically experiences a high humidity level of 88%, which is consistent with February, maintaining the same damp atmosphere. As the months progress into March and April, humidity shows a slight decline, dropping to 86% and 84% respectively, hinting at the gradual easing of winter's grip. The trend continues into May and June, where humidity relaxes further to 80%, suggesting a shift towards warmer days. The height of summer in July brings a refreshing dip to 70%, before humidity levels creep back up in August. As autumn settles in, the humidity rises again, reaching 89% in October and remaining high through the winter months, hitting 90% in November before falling back to 89% in December. Overall, Plymouth's humidity exhibits a clear seasonal rhythm, with the highest levels occurring in the colder months, contrasted by a notable drop during the summer.

January Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, with January's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how January's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Plymouth

In January, Plymouth experiences a low UV Index of 2, meaning sun exposure is relatively safe, with a burn time of 45 minutes. This trend of lower UV levels continues into February, maintaining the same index and burn time, encouraging outdoor activities without the worry of sunburn. As spring approaches, the UV levels begin to rise, peaking in April and June where they reach 6 and 9, respectively, indicating a shift to high and very high categories, thereby reducing safe exposure time to just 15 minutes. This progression highlights the seasonal increase in UV intensity, making May and July particularly crucial for sun safety measures. After the summer, the UV Index gradually declines, retreating to low levels again in November and December. Overall, January serves as a reminder to enjoy the outdoors responsibly as UV exposure begins to increase with the changing seasons. For more detailed information, visit Plymouth UV Index.

Maximum UV Index Levels in Plymouth for January

The chart shows the monthly maximum UV Index (UVI) for Plymouth in January, 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 January 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.

January Sunshine in Plymouth

In January, Plymouth experiences a modest 99 hours of sunshine, marking the start of the year under typically grey skies. As the months progress, the sunshine begins to shine brighter, with February seeing a significant leap to 160 hours. This upward trend continues into March, where the days grow longer, offering 234 hours of sun—heralding the arrival of spring. By April and May, the city basks in 358 and 410 hours of sunlight, respectively, creating an inviting ambiance for outdoor activities. The summer months of June and July peak at 408 and 428 hours, showcasing Plymouth at its sunniest. Although the sunshine begins to dwindle in August, the city still enjoys a generous 392 hours. As autumn sets in, September sees 330 hours, while October, November, and December yield a notable decline to 262, 155, and 121 hours, respectively. This seasonal ebb and flow of sunshine not only shapes the local climate but also reflects the vibrant transition from winter's chill to summer's warmth in Plymouth.

Monthly Sunshine Duration in Plymouth: January Highlighted

The January sunshine duration represents the total number of hours Plymouth experiences direct sunlight during the month of January, excluding cloudy or obstructed periods. This chart compares the sunshine duration of January with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec99h160h234h358h410h408h428h392h330h262h155h121h
Data source: Plymouth January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Plymouth During January

In Plymouth, January brings a modest 24% chance of sunny weather, making it one of the cooler months for sun-seekers. This likelihood is slightly lower than February's 25%, but things begin to brighten up in March with a significant jump to 35%. As spring approaches, the trend becomes even more optimistic, with April witnessing a refreshing 55% chance of sunshine. This pattern indicates a gradual increase in sunny days as the year progresses, highlighting the contrast between winter's gloomy start and the blossoming brightness of spring. So, while January may not be the sunniest time of year, it paves the way for more cheerful weather just around the corner.

Percentage of Sunny Days in January in Plymouth

The chart illustrates the percentage of sunny days in Plymouth throughout the year, with January 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 January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Plymouth in January

In Plymouth, United Kingdom, January ushers in just 8 hours of daylight, a time when the short winter days linger. As the month progresses into February, the sunlight begins to increase, offering 10 hours, signaling the gradual shift towards spring. This trend continues through March, where daylight extends to 11 hours, and April delights with 13 hours. By May, the days grow notably longer at 15 hours, reaching a peak in June with an impressive 16 hours of daylight. However, as summer fades, the gradual reduction becomes apparent; July sees 15 hours, followed by 14 hours in August and a decline to 12 hours by September. The cycle continues with shorter days in the autumn months, dipping back to 10 hours in October and settling again at 8 hours in both November and December, marking the return to winter's grasp. This rhythmic ebb and flow of daylight not only defines the seasons but also enriches the way residents of Plymouth experience the year.

Average Daylight Hours in Plymouth for January

The chart illustrates the variation in daylight duration in Plymouth throughout the year, with January 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.

January Winds in Plymouth

In January, the winds of Plymouth, United Kingdom, whip through at an average speed of 7.3 m/s (16 mph), setting the tone for a blustery start to the year. As the seasons change, February sees an uptick in wind intensity, reaching 8.3 m/s (18 mph), making it the windiest month of winter. However, as spring approaches, a gentle decline follows, peaking in March at 6.5 m/s (15 mph) and dropping further to 5.3 m/s (12 mph) in April. This trend of diminishing wind continues into the summer months, with June recording the calmest breezes at 4.3 m/s (10 mph). Interestingly, the autumn months bring a gradual rebound in wind speeds, with October and December seeing a return to more vigorous winds at 6.5 m/s (15 mph) and 8.2 m/s (18 mph), respectively. This rhythmic fluctuation between strong and gentle winds throughout the year encapsulates the dynamic weather patterns that characterize Plymouth.

Average January Wind Speed in Plymouth

The chart displays monthly wind speed patterns in Plymouth, with values for each month shown alongside January's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how January's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec7.3 m/s8.36.55.36.74.35.15.35.16.55.98.2
Data source: Plymouth January wind data, generated using information from the Copernicus Climate Change Service.

How January 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 January'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 January, the temperature in Plymouth typically ranges from a minimum of 2°C (36°F) to a maximum of 14°C (57°F), with an average of 8°C (47°F). The month experiences around 78 mm (3.1 in) of precipitation over approximately 12 days and maintains a consistent humidity level of 88%. In contrast, February presents slightly cooler temperatures, with minimums dipping to -1°C (31°F) while the average remains at 8°C (47°F) and maximums reaching up to 13°C (55°F). This month also sees an increase in precipitation, totaling about 102 mm (4.0 in) over 15 days, but humidity remains steady at 88%. For more detailed information on February conditions, visit Plymouth weather in February.

In comparing the weather between January and March, we see notable differences in temperature and precipitation. January typically experiences milder temperatures with a minimum of 2°C (36°F) and an average of 8°C (47°F), while March can get a bit chillier with a minimum of -2°C (29°F) despite having a similar maximum of 14°C (57°F). Precipitation increases slightly in March, with 93 mm (3.7 in) over 15 days compared to January's 78 mm (3.1 in) over 12 days. The humidity remains relatively high in both months, though it decreases slightly from 88% in January to 86% in March. For a detailed look at what to expect, check out Plymouth weather in March.

January and April exhibit distinct differences in weather patterns. In January, temperatures are cooler, with a minimum of 2°C (36°F) and an average high of 14°C (57°F), while April sees slightly milder conditions, ranging from a minimum of 3°C (38°F) to a maximum of 17°C (62°F). Precipitation is more prevalent in January, totaling 78 mm (3.1 in) over 12 days compared to April's 48 mm (1.9 in) over just 8 days, contributing to a more humid environment in January at 88%, while April's humidity is a bit lower at 84%. For a detailed look at what to expect, visit Plymouth weather in April.

In January, the weather is significantly colder, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 14°C (57°F). The month also sees considerable precipitation, with 78 mm (3.1 in) of rainfall over 12 days, combined with high humidity levels of 88%. In contrast, May experiences milder conditions, with temperatures ranging from a minimum of 6°C (43°F) to a pleasant maximum of 19°C (67°F). Despite slightly less precipitation at 75 mm (2.9 in) over 11 days, May's humidity is lower at 80%. For a closer look at Plymouth's weather during this vibrant month, visit Plymouth weather in May.

In January, the weather is noticeably cooler with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 14°C (57°F), accompanied by high humidity levels of 88%. During this month, Plymouth experiences around 78 mm (3.1 in) of precipitation over approximately 12 days. In contrast, June brings a significant warm-up, with average temperatures hovering between 10°C (50°F) and 22°C (72°F), and a slightly lower humidity of 80%. Interestingly, the total precipitation remains similar at 77 mm (3.0 in) over the same number of days. The shift from the cold, damp conditions of January to the milder, more pleasant climate of June highlights the diverse weather patterns in Plymouth throughout the year. For more details, you can check Plymouth weather in June.

January and July present a stark contrast in weather conditions. In January, temperatures range from a chilly 2°C (36°F) to a mild 14°C (57°F), with an average of 8°C (47°F). The month experiences higher humidity at 88% and sees approximately 78 mm (3.1 in) of precipitation over 12 days. In contrast, July boasts much warmer temperatures, with a minimum of 12°C (53°F) and a maximum of 24°C (75°F), averaging around 17°C (63°F). Precipitation in July is slightly lower at 72 mm (2.8 in) and occurs over 10 days, accompanied by a comfortable humidity level of 70%. For more details on July weather, visit Plymouth weather in July.

When comparing the weather in January and August, there is a notable difference in temperature and humidity. January features cooler temperatures, with a minimum of 2°C (36°F) and an average of 8°C (47°F), while August enjoys milder conditions, with a minimum of 13°C (55°F) and an average of 17°C (62°F). Both months receive the same amount of precipitation, 78 mm (3.1 in), spread over 12 days; however, January has a higher humidity level at 88% compared to August's 73%. This contrast highlights the seasonal shift from the cold, dampness of winter to the warmer, more pleasant days of summer, making August a much more inviting time of year. For more detailed information, you can check Plymouth weather in August.

In January, the weather is significantly colder, with minimum temperatures dropping to around 2°C (36°F) and averaging 8°C (47°F), while maximum temperatures reach only 14°C (57°F). This month also experiences higher humidity at 88% and more precipitation, totaling 78 mm (3.1 in) over 12 days. In contrast, September sees a milder climate with minimum temperatures at 10°C (50°F) and averages rising to 15°C (60°F), peaking at 21°C (70°F). Precipitation in September is slightly lower at 73 mm (2.9 in) over the same number of rainy days, accompanied by reduced humidity at 79%. For more details, check out Plymouth weather in September.

In comparing January and October weather, January typically presents cooler temperatures, with nighttime lows around 2°C (36°F) and daytime highs averaging 14°C (57°F). The month experiences around 78 mm (3.1 in) of precipitation over approximately 12 days, coupled with high humidity of 88%. In contrast, October boasts slightly warmer temperatures, with a minimum of 5°C (41°F) and an average high of 19°C (66°F). However, it also sees increased rainfall, totaling 138 mm (5.4 in) over about 16 days, maintaining a similar humidity level of 89%. The comparison highlights October's milder weather despite its higher precipitation compared to the chill of January. For more details, check out Plymouth weather in October.

When comparing the weather in January and November, January tends to be slightly cooler with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 14°C (57°F), while November is milder, with temperatures ranging from 4°C (40°F) to 16°C (60°F). Additionally, November experiences more significant precipitation, totaling 115 mm (4.5 in) over 17 days, compared to January's 78 mm (3.1 in) over just 12 days. Humidity levels are quite similar, with January at 88% and November at 90%, making both months feel damp. For more details on November's weather, you can check the link: Plymouth weather in November.

Comparing the weather in January and December reveals some notable differences. In January, temperatures range from a minimum of 2°C (36°F) to a maximum of 14°C (57°F), with an average of 8°C (47°F), while in December, the temperatures are slightly warmer, with a minimum of 4°C (39°F) and an average of 10°C (49°F), although both months share the same maximum temperature. January experiences less precipitation, totaling 78 mm (3.1 in) over 12 days, as opposed to December's 141 mm (5.6 in) over 20 days, indicating that January is relatively drier. Humidity levels remain high in both months, with January at 88% and December at 89%. For more detailed insights, you can visit Plymouth weather in December.

Compare Plymouth's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Plymouth

January in Plymouth presents a chilly transition from the mildness of December, marked by cooler temperatures and increased precipitation. With average highs around 8°C (47°F) and a significant humidity level of 88%, residents and visitors alike should prepare for damp and brisk conditions, which could be quite a contrast to the more temperate weather of late autumn. The month sees around 12 days of rainfall, adding to the overall sense of a wet and gray winter atmosphere. As you navigate through January's weather, it’s essential to embrace the unique charm this season brings to the city. For a more detailed overview of Plymouth's climate throughout the year, check out Plymouth Climate.