Last updated: August 21, 2025
January in Castel, Guernsey, presents a mild yet damp climate characterized by an average temperature of 9°C (49°F). This month experiences a maximum of 14°C (57°F), while chilly nights can drop to a minimum of 3°C (37°F). Visitors should prepare for frequent rain, with 94 mm (3.7 in) of precipitation spread across 14 days, contributing to a high humidity level of 89%. Despite the wetter conditions, the temperate weather offers a unique opportunity to explore the island's natural beauty.
In January, Castel, Guernsey experiences a refreshing winter climate, with temperatures ranging from a brisk 3°C (37°F) at night to a pleasant 14°C (57°F) during the day. The average temperature hovers around 9°C (49°F), creating a chilly yet tolerable atmosphere for outdoor activities. As the month progresses, the transition into February continues with minimal fluctuations, maintaining an average of 9°C (48°F). The gradual rise in minimum temperatures signals the beginning of early spring, setting the stage for warmer months ahead, as April welcomes slightly higher temperatures, peaking at 15°C (59°F). Overall, January acts as a bridge between winter’s chill and the milder days of spring, with steady averages and a reassuring warmth breaking through the cold.
In January, Castel, Guernsey experiences a notable increase in precipitation, with 94 mm (3.7 in) of rain falling over 14 days. This marks the beginning of a typically wet season, setting a trend that peaks in the coming months. Comparatively, January's rainfall is significantly higher than the drier spring months of April and May, where totals drop to 34 mm (1.3 in) and 55 mm (2.2 in), respectively. However, as winter transitions into early spring, precipitation levels remain consistent, with February also seeing substantial rainfall at 86 mm (3.4 in) over 16 days. As the year progresses, rainfall tends to taper off, yet the late autumn months of October and November return with vigor, showcasing Castel's variable climate, where dampness often returns to dominate the landscapes.
In January, Castel, Guernsey experiences a high humidity level of 89%, setting the tone for a winter characterized by moisture-laden air. This trend continues into February with only a slight dip to 88%, before gradually decreasing through the spring months, reaching 84% in April and 81% in May. As summer approaches, humidity levels take a more significant plunge, dropping to 63% in July, the lowest point of the year. However, as the season transitions into autumn, humidity begins to rise again, peaking at 90% in November and December. This cyclical pattern highlights a clear seasonal fluctuation, with winter and late autumn enveloping Castel in a consistent embrace of dampness, while the warmer months provide a refreshing respite.
In January, Castel, Guernsey experiences a low UV Index of 2, allowing for a more leisurely outdoor lifestyle with a burn time of 45 minutes. As the months progress, the UV Index gradually increases, peaking at 6 in April and May, categorized as high, where exposure should be more cautious with burn times dropping to 25 minutes. Notably, the UV Index soars to a remarkable 9 in June, signalling very high exposure risk, necessitating protective measures for those enjoying the summer sun, with a mere burn time of 15 minutes. While the UV levels temper down in the fall and winter months, with 2 in November and even 1 in December, it's clear that awareness of UV exposure is essential throughout the year. For more insights on UV levels in Castel, check out the detailed information at Castel UV Index.
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January in Castel, Guernsey, ushers in 107 hours of sunshine, setting the stage for a gradual awakening as the year progresses. As February rolls in with 163 hours, the days start to stretch, hinting at the promise of spring. By March, the sun begins to shine with gusto, offering 238 hours that make outdoor exploration increasingly appealing. The trend continues to soar, with April and May basking in 359 and 414 hours of bright skies, respectively, drawing locals and visitors alike to savor the blossoming landscapes. The peak arrives in July, with a dazzling 436 hours, before the light begins to wane slightly in August with 396 hours. As autumn approaches, the sunshine gently decreases, transitioning from 338 hours in September to 270 hours by October, while November and December follow suit, offering a cozy 181 and 130 hours. This annual dance of daylight not only marks the changing seasons but also paints a vibrant picture of life in Castel, where each month brings its unique charm under the sun.
In January, the likelihood of experiencing sunny weather in Castel, Guernsey, is relatively modest, with a 21% chance of sunshine. This trend reflects the typical winter climate, as the following months gradually see increased sunlight. For instance, February marks a slight rise to 28%, while March further boosts expectations with a 38% chance. As spring approaches, April brings a significant leap to 62%, indicating that sunnier days are on the horizon. This progressive increase underscores a seasonal transition, transitioning from the chilly gloom of winter to the brighter, more pleasant days of spring, making January one of the least likely months for sun-filled skies in the area.
In January, Castel, Guernsey, experiences a modest 8 hours of daylight, which begins to gradually increase as winter gives way to spring. By February, daylight extends to 10 hours, a sure sign that brighter days are on the horizon. The trend continues through the spring months, with daylight reaching 11 hours in March and expanding to 13 hours in April. As we transition into summer, the peak is reached in June with a generous 16 hours of sunshine, providing ample time for outdoor adventures. However, as summer yields to autumn, daylight begins to wane, dropping to 15 hours in July and 14 hours in August. The decline continues into the fall months, with 12 hours in September, 10 hours in October, and 9 hours in November, mirroring the shorter days of winter, which return relief when daylight dips back to 8 hours in December. This cyclical rhythm of light brings a gentle reminder of nature's ever-changing seasons in Castel.
In January, Castel, Guernsey experiences a brisk average wind speed of 9.0 m/s (20 mph), setting the tone for a winter that navigates between the fresh energy of winter storms and calmer days. As the year progresses, winds slightly increase in February, reaching 9.1 m/s (20 mph), before tapering off in March to 7.8 m/s (17 mph). The spring months bring a gradual decline, with April offering gentler breezes at 6.8 m/s (15 mph) and May picking up to 8.2 m/s (18 mph). June, however, surprises with its calmest winds of the year at 4.6 m/s (10 mph). The summer sees moderate gusts, hovering around 6.0 m/s to 6.6 m/s (13 to 15 mph), before the winds regroup in October, returning to 8.2 m/s (18 mph). As the year winds down, both November and December reflect a shift back to the gusty charms of winter, with December peaking at 9.8 m/s (22 mph). This cyclical dance of wind patterns showcases the dynamic climate of Castel, weaving a unique narrative through each month.
Weather in Castel varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Castel, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of January and February, January generally features slightly warmer temperatures, with a minimum of 3°C and a maximum of 14°C, while February sees a lower minimum of 0°C and a maximum of 13°C. Both months share a similar average temperature of around 9°C. Precipitation levels in January are slightly higher at 94 mm, compared to 86 mm in February, although February experiences a greater number of rainfall days, totaling 16 compared to January's 14. Humidity levels remain quite comparable, with January at 89% and February at 88%. For more detailed insights into February weather specifics, you can check Castel weather in February.
In January, the weather tends to be slightly warmer, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 14°C (57°F). The month sees significant precipitation, totaling 94 mm (3.7 in) over about 14 days, and humidity levels are relatively high at 89%. In contrast, March experiences cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 13°C (55°F), while maintaining the same average temperature of 9°C (49°F). Precipitation is lower at 73 mm (2.9 in), though it is spread over more days, totaling 15. Humidity also decreases slightly to 85%. For more specific details about the weather in March, you can check Castel weather in March.
In January, the weather tends to be cooler, with temperatures averaging around 9°C (49°F) and a minimum low of 3°C (37°F). The month also experiences considerable precipitation, with about 94 mm (3.7 in) over 14 days, and humidity remains high at 89%. In contrast, April brings slightly warmer temperatures, averaging 10°C (50°F) with minimums around 5°C (41°F) and maximums reaching up to 15°C (59°F). Additionally, there is significantly less rainfall, totaling 34 mm (1.3 in) over just 8 days, and a lower humidity level of 84%. For more detailed information about April weather, you can visit Castel weather in April.
In January, the weather is notably cooler, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 14°C (57°F). This month experiences considerable precipitation, totaling 94 mm (3.7 in) over 14 days, accompanied by high humidity levels at 89%. In contrast, May brings milder conditions, with temperatures starting at a minimum of 7°C (45°F) and reaching up to 18°C (65°F) on average. The rainfall decreases significantly to 55 mm (2.2 in) spread over just 8 days, and humidity falls to a more comfortable 81%. For a closer look at the weather in May, you can check Castel weather in May.
In January, temperatures are considerably cooler, with a minimum of 3°C (37°F) and average highs reaching only 14°C (57°F). The month experiences a significant amount of precipitation, totaling 94 mm (3.7 in) across 14 days, coupled with a high humidity level of 89%. In contrast, June enjoys milder conditions, with temperatures starting at a minimum of 11°C (53°F) and averaging around 14°C (58°F) to a maximum of 19°C (67°F). Precipitation drops to 59 mm (2.3 in) over just 8 days, and humidity decreases to a more comfortable 77%. For more detailed information about weather in June, visit Castel weather in June.
In January, the weather is quite chilly, with minimum temperatures around 3°C (37°F) and average highs reaching only 14°C (57°F). This month typically experiences significant precipitation, averaging 94 mm (3.7 in) over about 14 days, coupled with high humidity levels of 89%. In contrast, July offers a much more temperate climate with minimum temperatures of 14°C (57°F) and average highs hitting 21°C (70°F). The precipitation drops to a mere 37 mm (1.5 in) spread over just 7 days, and humidity decreases to a comfortable 63%. For more details on the weather in July, you can check Castel weather in July.
January and August present strikingly different weather conditions. In January, temperatures range from a chilly 3°C (37°F) to a mild maximum of 14°C (57°F), with an average of 9°C (49°F). This month also sees high humidity at 89% and significant rainfall, totaling 94 mm over 14 days. In contrast, August feels much warmer, with temperatures fluctuating between 14°C (57°F) and a pleasant 22°C (72°F), averaging at 17°C (63°F). Precipitation decreases to 50 mm over just 9 days, and humidity levels drop to a more comfortable 71%. For more detailed weather information, check out Castel weather in August.
In January, the weather tends to be significantly cooler, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 14°C (57°F). The month is characterized by high humidity levels at 89% and considerable precipitation, totaling 94 mm (3.7 in) over approximately 14 days. In contrast, September experiences milder conditions, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 21°C (71°F) and an average humidity level of 76%. Precipitation in September is also lower, amounting to 63 mm (2.5 in) across 9 days. For more details on the weather during September, you can check Castel weather in September.
In January, temperatures are cooler, with a minimum of 3°C (37°F) and an average of 9°C (49°F), while October offers a milder climate, featuring a minimum of 9°C (48°F) and an average of 15°C (59°F). Precipitation is relatively high in both months, but October sees more rainfall, with a total of 144 mm (5.7 in) over 17 days compared to January's 94 mm (3.7 in) over 14 days. Despite the increased rainfall in October, humidity remains consistent at 89% for both months, creating a damp atmosphere. For more detailed information, check out this link: Castel weather in October.
In January, the weather is typically cooler, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 14°C (57°F) and an average of 9°C (49°F). This month sees about 94 mm (3.7 in) of precipitation over 14 days, and the humidity remains high at 89%. In contrast, November experiences slightly milder temperatures, with a minimum of 6°C (43°F) and a maximum of 17°C (63°F), averaging 12°C (54°F). However, November is wetter, receiving around 126 mm (5.0 in) of rainfall across 18 days and boasting a humidity level of 90%. For more detailed information, you can visit Castel weather in November.
Comparing the weather in January and December reveals some interesting differences. January typically experiences slightly cooler temperatures with a minimum of 3°C (37°F) and an average of 9°C (49°F), while December maintains a milder minimum of 5°C (41°F) and an average of 11°C (51°F). Precipitation is also more significant in December, with a total of 163 mm (6.4 in) over about 21 days compared to January's 94 mm (3.7 in) spread over 14 days. Humidity remains high in both months, with January at 89% and December slightly higher at 90%. For a closer look at the December weather in Castel, you can visit Castel weather in December.
As January settles in, Castel experiences a distinct chill compared to the milder months surrounding it. The temperature trends cooler, averaging around 9°C, with frequent dips that can catch even the most prepared off guard. Alongside this drop in temperature, precipitation becomes a notable factor, with nearly half the month seeing rain, resulting in an average of 94 mm over 14 days. The humidity hovers at a high 89%, adding to the overall winter feel. This contrasts sharply with the warmth and dryness of summer, making January a month where layers and raincoats are a must for anyone venturing outside! For a deeper dive into the weather patterns throughout the year, visit Castel Climate.