Last updated: March 17, 2025
In January, Castlewellan, United Kingdom experiences a blend of crisp winter temperatures and refreshing moisture. With maximum temperatures reaching 13°C (56°F) and dipping to a chilly -2°C (29°F), the average hovers around a brisk 6°C (43°F). The month is often characterized by 68 mm (2.7 in) of precipitation, falling across 12 days, resulting in a notably high humidity level of 87%. This wet and cool climate sets a serene backdrop for the enchanting landscapes, inviting both locals and visitors to appreciate the tranquil beauty of winter in Castlewellan.
In Castlewellan, United Kingdom, January marks the heart of winter with temperatures ranging from a chilly -2°C (29°F) to a mild 13°C (56°F). The average temperature hovers around 6°C (43°F), providing a brisk but manageable climate for winter outings. This month typically brings the coldest temperatures of the year, setting the stage for frosty mornings and occasional snow flurries. As January transitions into February and March, we see a slight warming trend, with minimums slowly creeping up, while the average temperatures remain consistent, showcasing the gradual shift from winter chill to early spring. The crisp air, combined with serene landscapes, makes January a captivating time to experience the beauty of Castlewellan.
In January, Castlewellan experiences an average precipitation of 68 mm (2.7 in) over the course of 12 days, setting the tone for a wet winter. As the months progress, precipitation levels rise significantly, peaking in August at 120 mm (4.7 in) with an uptick in rainy days to 18. Interestingly, November and October also contribute notably to the annual total, each exceeding 100 mm, while spring months bring welcome relief with April seeing the lowest rainfall at just 47 mm (1.8 in) across only 9 days. This pattern underscores a seasonal shift, with winter and late summer showcasing the most rainfall, while the spring lends a drier breath to the region.
In January, Castlewellan experiences a relatively high humidity level of 87%, setting a trend that continues well into the year. This moisture-laden atmosphere persists as humidity remains comparable in February and March, both at 86%. As the seasons shift, there’s a slight decline in April with 85%, followed by a drop to 82% in May, hinting at a gradual drying as spring progresses. However, the summer months see humidity rise again, with June to August oscillating between 84% and 86%, before climbing to 88% in September. The year culminates with a significant peak in humidity, with October and November escalating to 89% and 90%, respectively, before tapering off slightly in December to 86%. This pattern suggests a pronounced seasonal fluctuation, characterized by a moist winter and autumn that contrasts with drier periods in late spring.
In January, Castlewellan experiences an exceptionally low UV Index of 1, allowing for a safe exposure time of 45 minutes without the risk of sunburn. This minimal UV radiation continues into February, maintaining the same index and burn time. As the seasons progress, March and April see a notable increase, with the UV Index rising to 4 and 5, respectively, indicating a moderate exposure level that shortens burn times to 30 minutes. By May, the UV Index peaks at 7, marking the start of the high exposure category, which further reduces safe exposure time to 25 minutes. The trend of very high UV levels in June and July (both at 8) urges caution, with only 15 minutes safe before risk sets in. August witnesses a drop to 6, followed by a gradual decline through the fall months, with September and October returning to moderate levels. As the year closes, November and December revert to a low UV index of 2 and 1, respectively, allowing for longer exposure times again. Overall, the trend in Castlewellan shows a clear seasonal fluctuation in UV radiation, highlighting the importance of adjusting sun safety measures throughout the year. For more detailed information, check the Castlewellan UV Index.
UV Risk Categories
In Castlewellan, January ushers in the year with a modest 81 hours of sunshine, a stark contrast to the brighter months ahead. As winter fades, the days gradually lengthen, with February bringing 150 hours and March further delighting residents with 209 hours of radiant light. By April, the sun becomes a more prominent feature, offering a remarkable 322 hours. This upward trend continues into spring and summer, peaking in May with 403 hours, closely followed by June at 394 hours and July with 399 hours. Even during the typically less sunny month of August, Castlewellan enjoys a generous 349 hours. As autumn approaches, sunshine begins to wane, with hours diminishing to 295 in September and further dropping to 232 in October. The year winds down with November and December enveloping the town in quieter, gloomier months, where only 115 and 87 hours of sunlight grace the skies, respectively. This progression reflects the rhythmic dance of light and dark throughout the year, inviting locals and visitors alike to embrace each season's unique charm.
In Castlewellan, the likelihood of encountering sunny weather in January stands at a modest 28%, making it one of the brighter months in the early part of the year. This percentage is notably higher than February's 22% and March's 21%, suggesting a slight peak in sunshine as winter starts to loosen its grip. Interestingly, January's sun chance diminishes as the year progresses, with April seeing a more generous 43% and May following closely at 35%. Overall, while January offers a decent chance of sun relative to the bleak gloom of winter, the trend reveals that the brightness tends to increase as spring approaches, inviting the return of more cheerful weather.
In Castlewellan, United Kingdom, January ushers in the year with a modest seven hours of daylight, marking the winter season's peak darkness. As the month transitions into February, there's a noticeable shift—daylight extends to nine hours, hinting at the imminent arrival of spring. This trend continues in March, where daylight reaches eleven hours, further uplifting spirits. By April, the sun graces the region for an impressive fourteen hours, a clear sign that longer days are here to stay. The daylight duration peaks in June at seventeen hours, offering residents ample time to enjoy the outdoors. As summer fades into autumn, daylight gradually recedes, with August at fourteen hours and September at twelve hours. By October, daylight drops to ten hours, and as winter approaches again, November brings only eight hours, before settling back to seven hours in December. This cyclical pattern of increasing and decreasing daylight beautifully reflects the changing seasons in Castlewellan.
In January, Castlewellan experiences an average wind speed of 5.0 m/s (11 mph), setting the stage for a month that feels brisk yet manageable. As winter deepens, the winds begin to pick up, peaking in February at 6.9 m/s (16 mph), providing a notable increase that invigorates the landscape. Following this peak, the winds gradually ebb in the subsequent months, with April seeing a gentle lull at 3.9 m/s (9 mph), reflecting the transition to spring. This trend of decreasing wind speed continues into the summer, reaching its lowest point in July at 2.9 m/s (7 mph), ideal for enjoying the calmness of the great outdoors. As the year progresses, wind speeds begin to rise again in the fall, culminating in a return to average speeds of around 5.5 m/s (12 mph) by late autumn. This cyclical pattern not only shapes the weather but also enhances the natural beauty of Castlewellan throughout the seasons.
The weather in Castlewellan 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 Castlewellan and find detailed weather information for every month.
January and February exhibit similar average temperatures, both hovering around 6°C (43°F). However, January tends to be slightly colder, with minimum temperatures dipping to -2°C (29°F) compared to February's minimum of -1°C (31°F). While both months are relatively wet, February experiences more precipitation, totaling 99 mm (3.9 in) over 17 days, compared to January's 68 mm (2.7 in) over 12 days. Humidity remains fairly consistent, with January at 87% and February slightly lower at 86%. For a more detailed overview, you can check Castlewellan weather in February.
January and March showcase a gradual shift in weather conditions. In January, temperatures range from a minimum of -2°C (29°F) to a maximum of 13°C (56°F), with an average of 6°C (43°F). The month sees a total precipitation of 68 mm (2.7 in) over about 12 days, coupled with high humidity at 87%. Conversely, March experiences slightly lower minimum temperatures at -3°C (27°F) but averages a bit higher at 7°C (44°F), reaching a maximum of 14°C (58°F). Precipitation increases to 92 mm (3.6 in) over approximately 16 days, with humidity remaining relatively stable at 86%. For more details on specific weather patterns, you can check Castlewellan weather in March.
In January, the weather is notably colder, with temperatures ranging from a chilly -2°C (29°F) to a mild 13°C (56°F) and an average of 6°C (43°F). The month sees significant precipitation of 68 mm (2.7 in), spread over 12 days, and high humidity levels at 87%. In contrast, April brings a welcome warming trend, with temperatures ranging from 0°C (32°F) to 16°C (61°F) and an average of 8°C (47°F). Precipitation decreases to 47 mm (1.8 in), occurring over 9 days, and humidity remains slightly lower at 85%. For a detailed look at what to expect, you can visit Castlewellan weather in April.
In January, the weather is quite chilly, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 13°C (56°F), averaging around 6°C (43°F). The month also experiences significant humidity at 87% and sees approximately 68 mm (2.7 in) of precipitation over 12 days. Conversely, May brings a noticeable warming trend, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 19°C (67°F) and an average of 11°C (52°F). The precipitation levels are slightly lower at 66 mm (2.6 in), with humidity decreasing to 82% and the same 12 rainy days. For a more detailed look at May weather, visit Castlewellan weather in May.
January and June offer contrasting weather experiences. In January, temperatures typically range from a chilly -2°C (29°F) at their lowest to a mild 13°C (56°F) at their highest, with an average of 6°C (43°F). The month sees about 68 mm (2.7 in) of precipitation over 12 days, accompanied by high humidity levels of 87%. In contrast, June boasts significantly warmer temperatures, with minimums around 7°C (44°F) and maximums reaching 24°C (75°F), averaging at 14°C (57°F). Although June receives slightly more precipitation at 78 mm (3.1 in) spread over 14 days, the humidity is somewhat lower at 84%. For more detailed insights, check out Castlewellan weather in June.
In comparing the weather between January and July, January tends to be quite chilly, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 13°C (56°F). The month is characterized by high humidity levels at 87% and typically sees about 68 mm (2.7 in) of precipitation over approximately 12 days. In contrast, July offers much milder conditions, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 24°C (76°F). While it is slightly wetter in July, with total precipitation of 85 mm (3.3 in) over 14 days, the humidity remains relatively similar at 86%. For more details on July weather, you can check Castlewellan weather in July.
January and August present distinctly different weather patterns. In January, temperatures range from a chilly -2°C (29°F) at night to a mild 13°C (56°F) during the day, with an average temperature of 6°C (43°F). The month experiences significant humidity at 87% and sees around 68 mm (2.7 in) of precipitation over approximately 12 days. In contrast, August offers a much warmer climate, with minimum temperatures of 9°C (48°F) and maximums reaching 21°C (69°F), averaging 15°C (59°F). While August is slightly less humid at 86%, it sees an increase in rainfall, totaling about 120 mm (4.7 in) across 18 days. For more details on August weather, you can visit Castlewellan weather in August.
January and September exhibit notable differences in weather conditions. In January, temperatures range from a chilly -2°C (29°F) at night to a mild 13°C (56°F) during the day, with an average temperature of 6°C (43°F). This month sees about 68 mm (2.7 in) of precipitation over 12 days, accompanied by high humidity levels at 87%. In contrast, September enjoys warmer temperatures, with nightly lows of 5°C (41°F) and daytime highs reaching 20°C (69°F), averaging 13°C (56°F). This month experiences slightly higher precipitation at 83 mm (3.3 in) over 16 days, and the humidity remains comparable at 88%. For more details about September's weather, you can visit Castlewellan weather in September.
In January, temperatures in Castlewellan range from a chilly -2°C (29°F) at night to a mild 13°C (56°F) during the day, with an average of 6°C (43°F). The month sees about 68 mm (2.7 in) of precipitation spread over 12 days, and the humidity hovers around 87%. In contrast, October experiences slightly warmer temperatures, with nighttime lows of 2°C (37°F) and daytime highs reaching 18°C (64°F), resulting in an average of 11°C (52°F). Precipitation increases to 104 mm (4.1 in) over 17 days, while humidity remains comparable at 89%. For a detailed look at October weather, check out Castlewellan weather in October.
In January, temperatures typically range from a minimum of -2°C (29°F) to a maximum of 13°C (56°F), with an average of 6°C (43°F). The month experiences about 68 mm (2.7 in) of precipitation over 12 days and a high humidity level of 87%. In comparison, November sees slightly milder temperatures, with a minimum of 1°C (34°F) and a maximum of 14°C (58°F), averaging 8°C (47°F). However, November is wetter, receiving 113 mm (4.5 in) of precipitation across 16 days and exhibiting a humidity level of 90%. For further details, check out Castlewellan weather in November.
The weather in January tends to be slightly colder than in December, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 13°C (56°F), compared to December's temperatures, which range from a minimum of 0°C (32°F) to a maximum of 13°C (55°F). January also sees a bit less rainfall, with 68 mm (2.7 in) of precipitation over 12 days, whereas December experiences more precipitation at 104 mm (4.1 in) over 14 days. Humidity remains relatively similar between the two months, with January at 87% and December at 86%. For a closer look at the weather specifics in December, you can visit Castlewellan weather in December.
January in Castlewellan marks a significant shift in weather compared to the milder months that precede and follow it. With its chilly temperatures and high humidity, this month's conditions are characterized by brisk air and frequent rain, making it one of the wetter times of the year. The array of cold days and the persistent likelihood of precipitation can create a profound sense of winter's grip. As the landscape dons a frosty veneer, it's a stark contrast to the warmer, sunnier days of spring and summer. If you're curious about how the climate evolves throughout the year, explore more at Castlewellan Climate.