Last updated: August 21, 2025
In Saint Helier, Jersey, January presents a chilly yet captivating climate, with maximum temperatures reaching 13°C (56°F) and an average hovering around 8°C (47°F). Nightfalls bring colder moments, dipping to a minimum of 2°C (35°F). January is also a wet month, with total precipitation of 97 mm (3.8 in) over approximately 14 days, contributing to a humidity level of 90% that intensifies the crisp winter air. This combination of mild temperatures and frequent rainfall creates a unique atmosphere, perfect for those who appreciate the beauty of a wintry coastal landscape.
In Saint Helier, January typically ushers in a cool yet mild winter atmosphere, with temperatures ranging from a chilly 2°C (35°F) at night to a pleasant 13°C (56°F) during the day. The average temperature stands around 8°C (47°F), indicating a relatively stable winter climate that precedes a slight dip in February, where nighttime lows can reach -1°C (31°F). As the season transitions into spring, the trend gradually shifts upwards; March offers a hint of warmth with averages pushing to 9°C (48°F) and milder highs. Overall, January functions as a pivotal month in this annual temperature cycle, bridging the colder winter lows and the promising warmth that begins to emerge in the following months.
January in Saint Helier, Jersey, welcomes the new year with a refreshing splash of 97 mm (3.8 in) of precipitation, making it one of the wetter months. With rain falling on 14 days, the landscape is invigorated, setting a tone of renewal. As winter transitions into spring, February brings slightly less rainfall at 90 mm (3.5 in) over 16 days, while March sees a further dip with 84 mm (3.3 in) across 15 days. This gradual decrease hints at the emerging spring, characterized by lighter showers. April, with only 36 mm (1.4 in) over 8 days, offers a welcome respite, suggesting a shift towards drier conditions. As the year unfolds, the trend hints at a more variable climate with notable peaks in precipitation during the latter months, especially October's 157 mm (6.2 in), emphasizing the island's captivating yet unpredictable weather patterns.
In January, Saint Helier experiences a high humidity level of 90%, marking the peak of the winter months. This moisture-laden air begins to ease as February sees a slight drop to 89%, but the trend of high humidity continues into the early spring months, with March at 86% and April at 84%. As spring transitions into summer, humidity levels show a notable decline, reaching 80% in both May and June, creating a warmer, more comfortable atmosphere. The summer months bring even more relief, with July experiencing the lowest humidity of the year at 69%. However, as autumn approaches, humidity rises again, peaking in November and December at 92%, creating a cozy yet damp feel during the winter holidays. Overall, the trend in Saint Helier reveals a significant seasonal variation, with January's humidity setting the tone for a year rich in moisture, particularly during the winter and early spring months.
In January, the UV Index in Saint Helier, Jersey, stands at a mild 2, indicating a low exposure category, with a safe burn time of 45 minutes. As the months progress, we see a gradual increase in UV intensity, reaching a moderate 3 in February, and a 4 in March, while still maintaining manageable burn times of 30 minutes. The transition into April heralds a notable rise, with the UV Index climbing to 6 and categorized as high. This upward trend continues into May and June, peaking at a striking 9 during the summer months, where sun exposure becomes significantly riskier with burn times shortened to just 15 minutes. Post-summer, the index begins to taper off, returning to 6 in September, then down to a more moderate 4 in October before settling back to 2 in November and 1 in December, emphasizing a clear seasonal pattern in UV intensity. For a detailed overview of this data, visit Saint Helier UV Index.
UV Risk Categories
In January, Saint Helier, Jersey welcomes the year with a modest 104 hours of sunshine, setting a gentle tone for the months ahead. As winter gives way to spring, February sees a notable increase to 166 hours, hinting at the gradual awakening of longer days. By March, sunshine begins to flourish with 239 hours, making way for the vibrant blooms of April, which enjoys a remarkable 356 hours. The sun reaches its zenith in the summer months, peaking at 432 hours in July before slightly tapering off in August. The subsequent months signal a return to cozy indoor activities, as September offers 334 hours, followed by the crisp fall transition in October with 270 hours. As the calendar turns towards the end of the year, November and December see a decline, gifting 184 hours and 132 hours respectively, reminding us of the evolving seasons and the comforting presence of winter's embrace.
In Saint Helier, Jersey, the likelihood of sunny weather in January stands at a modest 20%, marking the beginning of a gradual upward trend as the year progresses. Following January, the chance of sunshine rises to 30% in February and 41% by March, suggesting that winter's hold is loosening as spring approaches. As we move into April, the probability of sun further increases to a notable 64%, emphasizing the arrival of brighter days. This pattern reveals a clear seasonal transition, where early winter gloom gives way to the growing warmth and light of spring, making January the perfect month to anticipate the gradual return of sunshine in the months ahead.
In Saint Helier, Jersey, January marks the beginning of the year with 8 hours of daylight, a period that gradually brightens as the season progresses. As the days turn into February, the sunlight increases to 10 hours, hinting at the promise of spring. March brings further lengthening to 11 hours, while April delights with 13 hours, showcasing nature's awakening. May and June peak with 15 and 16 hours respectively, offering the longest days of the year filled with vibrant activity. As summer wanes, daylight begins to recede, dropping to 15 hours in July and 14 hours in August, before tapering off to 12 hours in September. The descent continues through the fall months, with October at 10 hours, November at 9 hours, and returning to 8 hours by December, mirroring the cycle that welcomes winter once more. This rhythmic dance of daylight beautifully illustrates the transition of seasons, enhancing the charm of life in this coastal haven.
In January, the winds in Saint Helier, Jersey, average a brisk 7.8 m/s (17 mph), setting the tone for the season ahead. As the months progress, wind speeds fluctuate, peaking in December at 8.7 m/s (19 mph). Interestingly, February sees a slight increase to 8.2 m/s (18 mph), while March cools slightly to 7.0 m/s (16 mph). The trend reveals a transition to calmer conditions by late spring, with April experiencing the lowest average wind speed of 6.3 m/s (14 mph). However, as summer approaches, speeds begin to rise again, maintaining a gentle breeze through August before dipping once more by September. This seasonal dance of winds paints a vibrant picture of the climate in this charming island locale, where each month offers its unique breath of fresh air.
Weather in Saint Helier varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Saint Helier, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February in Saint Helier exhibit similar average temperatures, with January starting at a minimum of 2°C (35°F) and February dipping slightly to -1°C (31°F). Both months see a high of 13°C (56°F), but January typically experiences more rainfall, averaging 97 mm (3.8 in) across 14 days compared to February's 90 mm (3.5 in) over 16 days. Humidity remains relatively high in both months, with January at 90% and February slightly lower at 89%. For a more detailed look at the weather conditions, you can visit Saint Helier weather in February.
January and March present distinct weather patterns, with January generally being cooler and wetter. In January, temperatures range from a minimum of 2°C (35°F) to a maximum of 13°C (56°F), accompanied by significant precipitation totaling 97 mm (3.8 in) across 14 days, resulting in high humidity levels at 90%. In contrast, March sees a slight drop in minimum temperatures to -2°C (29°F) while average highs reach 14°C (58°F). Although it experiences slightly less precipitation at 84 mm (3.3 in) over 15 days, humidity levels remain relatively high at 86%. For more details on the weather specifics, you can refer to Saint Helier weather in March.
In January, the weather is generally colder with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 13°C (56°F), accompanied by high humidity levels at 90%. January typically sees significant precipitation, with about 97 mm (3.8 in) falling over 14 days. In contrast, April brings milder temperatures, with a minimum of 5°C (41°F) and a maximum of 17°C (62°F), while humidity decreases slightly to 84%. Precipitation in April is much lighter, totaling around 36 mm (1.4 in) over 8 days, making it a more pleasant time of year. For further details on weather conditions specific to April, you can explore Saint Helier weather in April.
In comparing the weather of January and May, significant differences emerge. January experiences colder temperatures, with a minimum of 2°C (35°F) and an average of 8°C (47°F), while May enjoys warmer conditions, with temperatures ranging from a minimum of 7°C (46°F) to a maximum of 20°C (69°F). Precipitation is also more prevalent in January, with 97 mm (3.8 in) over 14 days, compared to May's 63 mm (2.5 in) of rainfall spread over 10 days. Furthermore, humidity levels are higher in January at 90%, compared to 80% in May, contributing to the overall chill of the winter month. For a closer look at what to expect in May, you can check Saint Helier weather in May.
In January, the weather in Saint Helier is quite cool, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 13°C (56°F). The average temperature hovers around 8°C (47°F), accompanied by significant rainfall totaling 97 mm (3.8 in) over approximately 14 days. The high humidity of 90% adds to the chilly feel of the month.
In contrast, June brings a noticeable warmth, with temperatures rising to a minimum of 11°C (53°F) and peaking at 24°C (76°F). The average temperature in June is more pleasant at 15°C (60°F). Rainfall decreases to 71 mm (2.8 in) over about 10 days, and humidity drops to 80%, creating a more comfortable atmosphere. For more details on the favorable conditions, check out Saint Helier weather in June.
The weather in January and July presents a striking contrast, highlighting the seasonal changes. In January, temperatures range from a chilly 2°C (35°F) at their lowest to a mild 13°C (56°F) at their peak, with an average of 8°C (47°F). The month sees a significant amount of precipitation, totaling 97 mm (3.8 in) over about 14 days, alongside high humidity levels at 90%. In contrast, July is much warmer, with temperatures starting at 14°C (58°F), averaging at 17°C (63°F), and reaching up to a comfortable 27°C (80°F). Precipitation is considerably lower at 47 mm (1.9 in) over just 9 days, and humidity drops to 69%. For a closer look at July weather specifically, visit Saint Helier weather in July.
In January, the weather is quite cool, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 13°C (56°F), and an average temperature of 8°C (47°F). The month experiences significant precipitation of 97 mm (3.8 in) over approximately 14 days, coupled with high humidity at 90%. In contrast, August offers a mild and pleasant climate, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), averaging around 18°C (64°F). Rainfall is lighter at 66 mm (2.6 in) over 13 days, with humidity dropping to 73%. For more details about the weather in August, you can visit Saint Helier weather in August.
In January, the weather in Saint Helier is characterized by cooler temperatures, with a minimum of 2°C (35°F) and an average of 8°C (47°F), reaching a maximum of 13°C (56°F). This month also experiences a significant amount of precipitation, totaling 97 mm (3.8 in) over approximately 14 days, accompanied by high humidity levels of about 90%. In contrast, September brings a noticeable warming trend, with minimum temperatures rising to 12°C (54°F) and averaging 17°C (63°F), peaking at 23°C (75°F). Although September sees slightly less precipitation at 82 mm (3.2 in) across about 11 days, the humidity drops to a more comfortable 79%. For those interested in a detailed look at the September weather, you can check out Saint Helier weather in September.
In January, the weather in Saint Helier is quite cool, with average temperatures ranging from a chilly 2°C (35°F) at night to a maximum of 13°C (56°F) during the day. The month sees a considerable amount of precipitation, averaging 97 mm (3.8 in) over about 14 rainy days, along with high humidity levels around 90%. In contrast, October offers a milder climate, where temperatures start at a minimum of 9°C (48°F) and can reach up to 20°C (69°F) on warmer days. However, it is wetter than January, with an average precipitation of 157 mm (6.2 in) across 19 days, and humidity remains relatively high at 89%. For a detailed outlook, you can view the weather specifics here: Saint Helier weather in October.
In comparing the weather between January and November, January typically presents cooler temperatures, with averages around 8°C (47°F) and a maximum of 13°C (56°F), while November is slightly warmer, with average temperatures of 12°C (53°F) and highs reaching 17°C (62°F). Additionally, November sees more precipitation at 125 mm (4.9 in) over approximately 18 days compared to January's 97 mm (3.8 in) over 14 days. Humidity levels remain relatively high in both months, with January at 90% and November slightly higher at 92%. For a more detailed look at the November weather in Saint Helier, you can visit Saint Helier weather in November.
In comparing the weather of January and December, January tends to be slightly cooler, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 13°C (56°F), while December has a slightly warmer range of 3°C (38°F) to 14°C (57°F). Additionally, precipitation is notably higher in December, totaling 185 mm (7.3 in) over 22 days compared to January's 97 mm (3.8 in) over 14 days. Humidity levels are similar, with January at 90% and December at 92%. For more detailed information, you can check Saint Helier weather in December.
January in Saint Helier brings a distinct chill, setting it apart from the milder months of the year. With an average temperature hovering around 8°C (47°F) and occasional dips to 2°C (35°F), it's one of the coldest times to visit. January is also marked by increased precipitation, averaging 97 mm (3.8 in) over about 14 days, contributing to a notably humid atmosphere, often reaching 90%. While the crisp air may invite fewer tourists compared to other seasons, this month offers a unique charm for those who appreciate the tranquil beauty of winter in Jersey. For more detailed insights into weather patterns throughout the year, explore Saint Helier Climate.