October Weather in Saint Helier, Jersey

Last updated: August 21, 2025

In October, Saint Helier, Jersey experiences a mild climate characterized by an average temperature of 15°C (59°F), with highs reaching up to 20°C (69°F) and lows dipping to 9°C (48°F). This month is marked by considerable humidity levels at 89%, providing a damp feel in the air. Rain is frequent, with 157 mm (6.2 in) of precipitation falling over 19 days, making it essential for visitors to pack accordingly. Embrace the cozy atmosphere as the vibrant autumn season unfolds in this charming coastal town.

October Temperature in Saint Helier

In October, Saint Helier, Jersey, experiences a delightful transition into autumn, with temperatures providing a comfortable balance for outdoor activities. The month begins with a minimum of 9°C (48°F), gradually rising to a pleasant average of 15°C (59°F), ultimately peaking at 20°C (69°F). This marks a gradual decline from the warmer days of summer, yet still offers mild conditions, especially compared to the preceding months. Visitors can expect crisp air coupled with refreshing sea breezes, making October an ideal time for exploring the island's scenic beauty and abundant attractions. Overall, this month's temperature trend highlights a shift towards cooler weather, setting the stage for the cozy charm of late autumn.

October Weather in Saint Helier: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Saint Helier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Helier, October typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec474748505560636462595350
Data source: Temperature data for Saint Helier 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.

October Precipitation in Saint Helier

In October, Saint Helier experiences a significant surge in precipitation, with an impressive 157 mm (6.2 in) of rain falling over 19 days. This marks a stark contrast to the drier months earlier in the year, particularly April and July, which recorded just 36 mm (1.4 in) and 47 mm (1.9 in) respectively. As autumn sets in, the skies open up, bringing more than double the precipitation of the previous month, September. The trend indicates that October not only brings a noticeable increase in rainfall but also sets the stage for the wetter winter months ahead, including November's 125 mm (4.9 in) and December's peak of 185 mm (7.3 in). This rainy pattern is essential for maintaining the region's lush greenery, heralding the end of the drier summer season.

October Precipitation Trends in Saint Helier

The chart displays monthly precipitation patterns in Saint Helier, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Saint Helier, October typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec979084366371476682157125185
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Saint Helier

In October, Saint Helier experiences a notable rise in humidity, reaching 89%, which is a peak for the month and reminiscent of the early winter months. Following a gradual decline from January's high of 90%, humidity levels dip to their lowest in July at 69%. As summer transitions into autumn, there's a shift back towards higher humidity, evidenced by a rise in September to 79% and an even more significant jump in October. This trend suggests a cozy return to moisture-laden air, setting the stage for the damp winters ahead, particularly as November and December see levels soar to 92%. Overall, October serves as a reminder of nature's cyclical dance between humidity and temperature, bridging the warmth of summer with the chill of winter.

October Average Humidity in Saint Helier

This chart illustrates the average monthly humidity levels in Saint Helier, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Saint Helier is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%86%85%80%80%69%73%79%89%92%92%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Saint Helier

As the year unfolds in Saint Helier, Jersey, trends in the UV Index reveal a clear seasonal pattern. October sees a moderate UV Index of 4, allowing for about 30 minutes of safe sun exposure before risking a burn. This decline from the peak summer months, where indices soared to 9 in June and July, signals a shift towards cooler weather and a more cautious approach to sun exposure. The UV levels begin to ease after the summer's intense heat, dropping to 6 in September and further to 4 in October, making it a perfect time to enjoy the outdoors while remembering to protect your skin. For more insights on UV exposure throughout the year, visit Saint Helier UV Index.

Maximum UV Index Levels in Saint Helier for October

The chart shows the monthly maximum UV Index (UVI) for Saint Helier in October, 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. In October, the maximum UV index in Saint Helier typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679986421
Data source: Saint Helier October 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.

October Sunshine in Saint Helier

October in Saint Helier, Jersey, continues the trend of diminishing daylight as the vibrant summer months fade away. With 270 hours of sunshine, October stands as a bridge between the sun-soaked summer and the cooler shades of winter. Following the peak of 432 hours in July, the sun's embrace begins to wane gradually, yet October still offers a generous amount of light. This month showcases a steady decline from September's 334 hours, hinting at nature's transition while still providing a pleasant backdrop for autumn strolls and coastal views. As the chilly winds start to blow, October invites locals and visitors alike to savor the last remnants of the sun's warmth.

Monthly Sunshine Duration in Saint Helier: October Highlighted

The October sunshine duration represents the total number of hours Saint Helier experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec104h166h239h356h412h408h432h392h334h270h184h132h
Data source: Saint Helier October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint Helier During October

In Saint Helier, Jersey, the likelihood of sunny weather in October sits at a modest 36%, reflecting a mild drop from the peak of 64% in April. This month tends to herald the transition into autumn, as the sun's presence becomes less consistent compared to the summer's brighter days. Interestingly, while October’s sunny chances are lower than the preceding months of September and August, they remain significantly higher than the dreary winter months that follow. With autumn's beautiful hues casting a backdrop, October can still surprise with sunny spells, offering charm amid the seasonal change.

Percentage of Sunny Days in October in Saint Helier

The chart illustrates the percentage of sunny days in Saint Helier throughout the year, with October 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 Saint Helier experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%30%41%64%42%34%46%41%43%36%32%25%
Data source: Saint Helier October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint Helier in October

As October arrives in Saint Helier, Jersey, the days begin to shorten, offering about 10 hours of daylight. This slight decline is a continuation of the trend observed since the longer summer days of June, which peak at 16 hours. Following the vibrant months of May and June, where daylight envelops the island in a warm embrace, October marks a shift towards the shorter, cozier days of late autumn. With each passing month, the transition is evident: daylight gradually wanes from a high of 15 hours in July to 10 hours in October, reflecting nature's rhythm as we prepare for the quieter, darker months ahead.

Average Daylight Hours in Saint Helier for October

The chart illustrates the variation in daylight duration in Saint Helier throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 42m10h 8m11h 55m13h 45m15h 19m16h 8m15h 42m14h 18m12h 32m10h 43m9h 6m8h 15m
Data source: Saint Helier daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in Saint Helier

As October ushers in the fall season, Saint Helier, Jersey experiences a gentle return of brisk winds, averaging 7.4 m/s (17 mph). This month stands out as a transitional phase, with wind speeds slightly higher than the summer lull, reflecting a shift from the milder breezes of June and July, which dipped to 4.4 m/s (10 mph) and 5.8 m/s (13 mph) respectively. Following the gradual decline through summer and early autumn, October's winds offer a refreshing reminder of the powerful gusts that come with winter, as November's average winds pick up again to 6.7 m/s (15 mph), and December sees a notable increase to 8.7 m/s (19 mph). The overall pattern highlights a captivating cycle of wind that shapes the coastal character of this charming island.

Average October Wind Speed in Saint Helier

The chart displays monthly wind speed patterns in Saint Helier, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec7.88.27.06.37.84.45.86.25.67.4 m/s6.78.7
Data source: Saint Helier October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in Saint Helier Compares to Other Months

Weather in Saint Helier varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Saint Helier, focusing on differences in temperature, rainfall, humidity, and UV levels.

October and January exhibit notable differences in weather conditions. In October, temperatures range from a mild 9°C (48°F) to a comfortable high of 20°C (69°F), with an average of 15°C (59°F). The month is also characterized by significant rainfall, accumulating 157 mm (6.2 in) over 19 days, resulting in a high humidity level of 89%. In contrast, January experiences colder temperatures, with a minimum of 2°C (35°F) and a maximum of 13°C (56°F), averaging just 8°C (47°F). Although January sees less precipitation at 97 mm (3.8 in) over 14 days, the humidity remains similarly high at 90%. For a detailed overview of January weather, refer to Saint Helier weather in January.

October and February present contrasting weather conditions, despite similar humidity levels of 89%. In October, temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (69°F), averaging at 15°C (59°F), whereas February experiences much colder temperatures, with minimums dropping to -1°C (31°F) and a maximum of 13°C (56°F), averaging around 8°C (47°F). Additionally, October sees more precipitation at 157 mm (6.2 in) across 19 days, compared to February’s 90 mm (3.5 in) over 16 days. For a detailed look at February weather in Saint Helier, check out Saint Helier weather in February.

In comparing the weather of October and March, October presents milder temperatures, with averages of 15°C (59°F) and a maximum of 20°C (69°F), while March experiences cooler conditions, averaging 9°C (48°F) with a maximum of 14°C (58°F). Precipitation is more prevalent in October, totaling 157 mm (6.2 in) over 19 days, in contrast to March's 84 mm (3.3 in) across 15 days. Despite a slightly lower humidity level in March at 86% compared to October's 89%, both months exhibit considerable moisture, characterizing the transition from summer to autumn in October and the onset of spring in March. For more details, check out Saint Helier weather in March.

When comparing the weather in October and April, October generally presents cooler temperatures with an average of 15°C (59°F), while April's average temperature is milder at 10°C (51°F). In October, the minimum temperature of 9°C (48°F) slightly surpasses April's 5°C (41°F), making it a bit chillier overall. Additionally, October experiences much higher precipitation levels, with 157 mm (6.2 in) falling over 19 days, compared to April's modest 36 mm (1.4 in) over just 8 days. Despite the frequent rain in October, humidity is slightly elevated at 89%, while April maintains a lower humidity of 84%. For more specific details regarding April weather, you can visit Saint Helier weather in April.

When comparing the weather in October and May, we notice some interesting differences despite similar maximum temperatures. In October, the average temperature reaches 15°C (59°F), with a daily minimum of 9°C (48°F) and a maximum of 20°C (69°F). However, this month is characterized by significantly higher precipitation, with 157 mm (6.2 in) falling over 19 days and humidity levels at 89%. In contrast, May tends to be milder and drier, with an average temperature of 13°C (55°F), a minimum of 7°C (46°F), and the same maximum of 20°C (69°F). Rainfall in May is much lighter at only 63 mm (2.5 in) over 10 days, accompanied by lower humidity levels of 80%. For a more detailed look at weather patterns, you can check Saint Helier weather in May.

In comparing the weather between October and June, we notice notable differences in temperature and precipitation. October sees cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 20°C (69°F), while June boasts warmer conditions, ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F). Furthermore, October tends to be much wetter, receiving an average of 157 mm (6.2 in) of rainfall over 19 days, compared to June's 71 mm (2.8 in) over just 10 days. Additionally, October has a higher humidity level at 89%, while June's humidity is slightly lower at 80%. For more detailed insights into June's weather, you can check Saint Helier weather in June.

In comparing the weather of October and July, it is evident that July enjoys warmer temperatures, with average highs reaching 27°C (80°F), while October temperatures are much cooler, ranging from a minimum of 9°C (48°F) to a maximum of 20°C (69°F). July also has significantly lower precipitation levels, with only 47 mm (1.9 in) over 9 days, compared to October's higher rainfall of 157 mm (6.2 in) across 19 days. Additionally, humidity is notably lower in July at 69%, whereas October experiences a much higher humidity level of 89%. This stark contrast highlights the transitional nature of October leading into the colder months, in contrast to the warm, summer ambiance of July. For more specifics on July weather, check out Saint Helier weather in July.

In comparing the weather of October and August, October tends to be significantly cooler and wetter. With average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 20°C (69°F), it feels much chillier than August, which enjoys higher temperatures, averaging between 14°C (57°F) and 25°C (78°F). Additionally, October experiences higher levels of precipitation, with 157 mm (6.2 in) of rain over 19 days, compared to August's 66 mm (2.6 in) over 13 days. The humidity also peaks in October at 89%, making it a more humid month than August, which is at 73%. For more details, you can check out Saint Helier weather in August.

In October, the weather becomes noticeably cooler than in September, with average temperatures dropping from 17°C (63°F) in September to 15°C (59°F) in October. The maximum temperature in October reaches only 20°C (69°F), compared to 23°C (75°F) in September, indicating a shift towards more autumn-like conditions. Additionally, October experiences significantly more rainfall, with 157 mm (6.2 in) of precipitation over 19 days, whereas September sees only 82 mm (3.2 in) over 11 days. Humidity levels also rise in October to an average of 89%, compared to 79% in September. For more details on September weather, you can visit Saint Helier weather in September.

October and November present a noticeable shift in weather patterns. In October, temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (69°F), creating a mild autumn atmosphere with an average temperature of 15°C (59°F). However, this month also brings substantial rainfall, with precipitation reaching 157 mm (6.2 in) over 19 days, contributing to a humidity level of 89%.

Conversely, November experiences cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 17°C (62°F), resulting in an average of 12°C (53°F). The month sees a decrease in precipitation to 125 mm (4.9 in) over 18 days, although humidity remains slightly higher at 92%. For more insights on the November weather, you can visit Saint Helier weather in November.

In comparing the weather patterns of October and December, October generally offers milder temperatures, averaging around 15°C (59°F) with a maximum of 20°C (69°F), while December's averages drop to 10°C (50°F) with a high of 14°C (57°F). Rainfall is also a significant factor; October typically sees 157 mm (6.2 in) of precipitation over 19 days, whereas December experiences slightly more rainfall at 185 mm (7.3 in) spread over 22 days. Additionally, humidity levels increase from 89% in October to 92% in December, contributing to a chillier and wetter atmosphere by the end of the year. For more details on December weather, you can visit Saint Helier weather in December.

Compare Saint Helier's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in Saint Helier

October in Saint Helier ushers in a distinct shift in weather, characterized by cooler temperatures and increased precipitation compared to the summer months. With average highs around a comfortable 15°C (59°F) and a notable 157 mm (6.2 in) of rainfall spread over 19 days, this month serves as a reminder that winter is on the horizon. The humidity level also rises to a damp 89%, contributing to a more overcast atmosphere that many experience differently than the bright, sunny days of summer. Embrace the cozy charm of October with its brisk air and lush landscapes as nature prepares for the colder seasons. For a deeper insight into the climatic trends, visit Saint Helier Climate.