Last updated: August 21, 2025
In October, Castel, Guernsey experiences a mild maritime climate, with an average temperature of 15°C (59°F), peaking at a maximum of 20°C (68°F) and dipping to a minimum of 9°C (48°F). This month is characterized by a high level of humidity at 89%, making the air feel crisp and refreshing. Rainfall is commonplace, with 144 mm (5.7 in) of precipitation recorded over 17 days, contributing to the lush, green landscapes typical of the region. Overall, October in Castel offers a blend of cool temperatures and frequent showers, inviting residents and visitors alike to embrace the beauty of autumn.
As October unfolds in Castel, Guernsey, the coastal charm is complemented by a pleasant temperature range, making it a delightful time to explore the island. The month typically sees minimum temperatures around 9°C (48°F), rising to a comfortable average of 15°C (59°F), and peaking at a delightful 20°C (68°F). This slight upward trend from the preceding months hints at the lingering warmth of autumn, as temperatures remain significantly milder compared to the chill of early winter. As the scenery shifts to vibrant fall colors, the balmy October weather invites both locals and visitors to enjoy outdoor activities, offering an ideal blend of comfort and seasonal beauty.
In October, Castel, Guernsey experiences a significant uptick in precipitation, boasting a substantial total of 144 mm (5.7 in), marking it as the wettest month of the year. This hefty rainfall is accompanied by 17 precipitation days, indicating that rain is a regular visitor, creating a contrast to the drier spells of earlier months. Following the relatively modest totals from the summer, October's deluge signals the onset of the wetter autumn season. As the landscape absorbs this abundance of moisture, the change not only nurtures the vibrant autumn foliage but also propels the region into the wetter months that follow, with November and December also showcasing high precipitation levels. Overall, October serves as a transitional marker, where the lush Guernsey scenery begins to flourish under the nourishing rains.
As October arrives in Castel, Guernsey, the humidity makes a notable return, rising to 89%, reminiscent of the cozy, moisture-rich air typical of winter. This month marks a shift from the drier summer months, where July dipped to a refreshing 63% and August hovered at 71%. Following September's humidity of 76%, October's figures align more closely with the high humidity levels of the earlier months of the year, where readings were consistently between 84% and 89%. As the year progresses towards winter, November and December maintain a steady humidity at 90%, indicating that Castel's climate embraces the enveloping embrace of dampness, creating a unique atmospheric transition that highlights the beauty of autumn in this coastal haven.
As October rolls into Castel, Guernsey, the UV Index drops to 4, marking a return to a moderate exposure category. This is a gentle decline from the heights of summer when the UV Index peaked at 9 in June, indicating a substantial risk of harm from unprotected sun exposure. While the burn time increases slightly to 30 minutes this month, it's essential to remain vigilant, especially after the sun's rays have been intense throughout the year. Compared to the earlier months, where exposure categories ranged from low to high, October offers a more manageable sun experience. As the season transitions, remembering these trends helps ensure safe outdoor activities. For detailed insights, check out the Castel UV Index.
UV Risk Categories
As autumn settles in, October graces Castel, Guernsey with a generous 270 hours of sunshine, transitioning from the luminous heights of summer. Following the peak brightness of July, when the sun shines for an impressive 436 hours, the days gradually shorten, but October still offers a vibrant glow. Compared to the 338 hours of sunshine enjoyed in September, this month experiences a noticeable decline, yet it remains a pleasant retreat from the dreary winter months ahead. This trend of diminishing daylight continues into November with only 181 hours, hinting at the seasonal shift and inviting residents to savor the warm hues of autumn before the darker days fully take hold.
In October, Castel, Guernsey experiences a 36% chance of sunny weather, marking a slight decline from the more promising conditions of the earlier months. While the sun shines more frequently during the springtime, peaking at 62% in April, autumn brings a noticeable shift towards cloudier days. As the year progresses, October's likelihood of sunshine surpasses only the gloomy winter months, hinting at a transitional atmosphere where crisp air meets lingering daylight. This seasonal trend reveals a soft descent from summer's warmth, reminding visitors to embrace the charming unpredictability of October's weather while savoring the last tastes of autumn's beauty.
October in Castel, Guernsey, marks a gentle transition as daylight begins to wane, offering around 10 hours of sunlight each day. This aligns with the gradual decrease observed since the peak of 16 hours in June. As the year progresses from the brighter spring and summer months into autumn, daylight hours shrink consistently, dipping from a vibrant 15 hours in May to this month’s more subdued offering. With the approach of winter, October’s daylight serves as a reminder of the fading warmth and the cozy indoor evenings that await. This cadence of shifting daylight not only highlights the changing seasons but also sets the stage for the quiet introspection often embraced during the colder months ahead.
As October arrives in Castel, Guernsey, the wind shifts gears, boasting an average speed of 8.2 m/s (18 mph). This marks a noticeable increase from the calmer summer months, where winds hovered around the 6 m/s range. The crispness begins to seep in, hinting at the transition from autumn to winter. October's winds are comparable to those of May, suggesting a sense of dynamism as nature prepares for the colder months ahead. Unlike the stronger gusts in December, which peak at 9.8 m/s (22 mph), October's breezy disposition sets the stage for the invigorating chill of late autumn, inviting locals and visitors alike to embrace the enchanting winds of the season.
Weather in Castel varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Castel, focusing on differences in temperature, rainfall, humidity, and UV levels.
In terms of weather, October is generally milder than January. October’s temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (68°F) with an average of 15°C (59°F), while January experiences colder temperatures, peaking at 14°C (57°F) and dropping to a minimum of 3°C (37°F), with an average of only 9°C (49°F). October also sees more precipitation, with 144 mm (5.7 in) over 17 days compared to January's 94 mm (3.7 in) across 14 days, although both months share the same humidity level of 89%. For more details on January weather in Castel, you can visit Castel weather in January.
In comparing the weather of October and February, October tends to be milder with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 20°C (68°F). It experiences significantly higher precipitation, averaging 144 mm (5.7 in) over 17 days, alongside relatively high humidity at 89%. In contrast, February presents cooler conditions, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 13°C (56°F). It receives less rainfall, around 86 mm (3.4 in) over 16 days, and a slightly lower humidity level at 88%. For more details about February weather, you can visit Castel weather in February.
October and March present distinct weather patterns, showcasing the transition from autumn to spring. In October, temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (68°F), with an average temperature of 15°C (59°F). This month is characterized by abundant rainfall, totaling 144 mm (5.7 in) over 17 days, and a high humidity level of 89%. In contrast, March experiences cooler temperatures, with lows of 0°C (32°F) and highs reaching 13°C (55°F), averaging at 9°C (49°F). Precipitation in March is significantly lower at 73 mm (2.9 in) across 15 days, accompanied by a slightly lower humidity of 85%. For a closer look at the weather in Castel during March, you can refer to this link: Castel weather in March.
In comparing the weather of October and April, October tends to be milder with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 20°C (68°F), while April’s temperatures are generally cooler, averaging between 5°C (41°F) and 15°C (59°F). October also experiences significantly more precipitation, with 144 mm (5.7 in) spread over 17 days, compared to April's lighter rainfall of 34 mm (1.3 in) over just 8 days. Humidity levels are slightly higher in October at 89%, contrasted with April's 84%. For more detailed insights, check out Castel weather in April.
October and May present distinctly different weather patterns. October experiences slightly warmer temperatures, with an average of 15°C (59°F) and maximums reaching up to 20°C (68°F), while May typically has a cooler average of 12°C (54°F) and max temperatures of 18°C (65°F). Precipitation levels are significantly higher in October, with 144 mm (5.7 in) over 17 days compared to May's modest 55 mm (2.2 in) across just 8 days. Additionally, October has higher humidity at 89%, compared to May's 81%, contributing to a markedly different feel in the air. For more details on May weather, you can visit Castel weather in May.
October tends to be cooler and wetter compared to June, with an average temperature of 15°C (59°F) compared to June's 14°C (58°F). While both months have similar maximum temperatures, October's minimum temperature drops to 9°C (48°F), slightly lower than June's 11°C (53°F). Additionally, October experiences significantly higher precipitation, averaging 144 mm (5.7 in) over 17 days, in stark contrast to June's 59 mm (2.3 in) over just 8 days. The humidity levels are also higher in October at 89%, compared to June's 77%. For a closer look at the weather conditions during June, check out Castel weather in June.
When comparing the weather in October to that of July, it’s evident that October is cooler and much wetter. In October, temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (68°F), with an average of 15°C (59°F). In contrast, July sees milder weather with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 21°C (70°F), and an average of 16°C (62°F). Additionally, October experiences significantly more precipitation, with 144 mm (5.7 in) over 17 days, compared to just 37 mm (1.5 in) over 7 days in July. The humidity is also higher in October at 89%, compared to 63% in July, making the latter feel more comfortable. For more details on July weather, you can visit Castel weather in July.
In comparing the weather between October and August, October is significantly cooler, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 20°C (68°F), whereas August enjoys milder conditions, with temperatures ranging from 14°C (57°F) to 22°C (72°F). October also brings about increased precipitation, accumulating 144 mm (5.7 in) over 17 rainy days, contrasted with August's much drier climate, which sees only 50 mm (2.0 in) across 9 days. Additionally, the humidity is notably higher in October at 89%, compared to the more comfortable 71% in August. For more details on August weather, you can visit Castel weather in August.
In comparing the weather of October to that of September, October tends to be cooler, with average temperatures dropping from 17°C (62°F) in September to 15°C (59°F). The minimum temperature in October is 9°C (48°F), while September's minimum holds at a warmer 12°C (54°F). Additionally, October experiences significantly more precipitation, totaling 144 mm (5.7 in) over 17 days, compared to September's 63 mm (2.5 in) over just 9 days. Humidity also rises in October, reaching 89% compared to September's 76%. For a detailed look at the September weather patterns, check out Castel weather in September.
In October, the weather features a milder temperature range with a minimum of 9°C (48°F), an average of 15°C (59°F), and a maximum of 20°C (68°F). This month experiences higher precipitation levels, totaling 144 mm (5.7 in) over 17 days and an average humidity of 89%. In contrast, November sees a drop in temperatures, with minimums at 6°C (43°F), an average of 12°C (54°F), and maximums reaching 17°C (63°F). Precipitation decreases slightly to 126 mm (5.0 in), occurring on 18 days, and humidity rises marginally to 90%. For a more detailed look at the November weather, you can visit Castel weather in November.
October and December showcase notable differences in weather patterns. In October, temperatures range from a minimum of 9°C (48°F) to a maximum of 20°C (68°F), with an average temperature of 15°C (59°F). The month experiences 144 mm (5.7 in) of precipitation over approximately 17 days, with humidity levels at 89%. In contrast, December sees cooler temperatures, with a minimum of 5°C (41°F), an average of 11°C (51°F), and a maximum of 14°C (58°F). It has slightly higher precipitation at 163 mm (6.4 in) over 21 days and a humidity level that rises to 90%. For a more detailed overview of December weather, please visit Castel weather in December.
As October unfolds in Castel, the weather brings a noteworthy shift characterized by cooler temperatures and a substantial increase in precipitation compared to other months. With an average temperature hovering around 15°C, this month signals the transition into autumn, wrapping the area in a refreshing, crisp air. The high humidity of 89% combined with approximately 17 days of rain paints a picture of a cozy, albeit damp, season. These changes make October distinct, inviting residents and visitors alike to embrace the charm of fall while exploring the stunning landscapes. For a deeper insight into Castel's climate throughout the year, check out Castel Climate.