Last updated: March 17, 2025
In January, Slane, Ireland, experiences a dynamic winter climate characterized by variable temperatures, from a maximum of 14°C (58°F) to a minimum of -4°C (25°F). The average temperature hovers around 6°C (43°F), creating a chilly atmosphere. Residents and visitors can expect approximately 50 mm (2.0 in) of precipitation over an average of 9 days, resulting in a humidity level of 85%. This blend of cool temperatures and damp conditions contributes to the enchanting winter landscape, making January a unique time to explore Slane's scenic charm.
In January, temperatures in Slane, Ireland showcase a crisp winter chill, with minimums dipping to -4°C (25°F) and average highs reaching a mild 14°C (58°F). This month serves as a precursor to the gradual warming trend that follows, as February remains similar with lows around -3°C (27°F) and the same average of 6°C (44°F). However, as spring approaches in March, temperatures start to rise, showcasing a maximum of 17°C (63°F), hinting at the emerging warmth. The transition continues through April and May, where daily averages climb from 9°C (48°F) to 12°C (53°F), and the maximum temperatures peak at a comfortable 24°C (75°F) by mid-spring. From June onward, Slane experiences its warmest months, with highs reaching up to 28°C (83°F) in both July and August, marking a significant departure from the colder beginning of the year. As autumn unfolds, the temperatures gradually cool down again, reinforcing Slane's distinct seasonal contrasts.
January in Slane, Ireland, typically ushers in the new year with moderate precipitation, recording an average of 50 mm (2.0 in) over approximately 9 days. While this amount is relatively modest compared to the following months, it sets the stage for a steadily increasing trend in rainfall. As winter transitions to spring, February sees a significant uptick in both precipitation—79 mm (3.1 in) over 15 days—and the number of rainy days, while March follows closely with 76 mm (3.0 in). This gradual increase continues into the warmer months, peaking in August when rainfall reaches its annual high at 104 mm (4.1 in). This pattern highlights a clear seasonal shift, with early year precipitation giving way to more abundant and frequent rain as the year progresses, emphasizing Ireland's lush, green landscape.
In January, Slane, Ireland, experiences a notable humidity level of 85%, which sets the tone for a month characterized by cool, damp conditions. As winter unfolds, humidity remains relatively high throughout the season, with February and March slightly edging up to 86%. This trend continues, peaking in October at 87%, where the transition to autumn brings a refreshing chill. The spring months bring a slight reprieve, as humidity dips to 83% in May, yet it soon levels out around 85% to 86% through the summer and into early autumn. Overall, the consistent humidity throughout the year paints a picture of a moist climate, offering rich soil and lush landscapes that define the charm of Slane.
In January, Slane, Ireland, experiences a low UV Index of 1, indicating minimal sun exposure risk with a burn time of approximately 45 minutes. This trend continues into February, keeping the UV Index at 2 while maintaining the same burn time. As spring approaches, the UV Index begins to rise noticeably, hitting 4 in March and 5 in April, which elevates the exposure category to moderate and shortens burn time to 30 minutes. The UV Index peaks during the summer months of June and July at 8, categorized as very high, requiring vigilance as the burn time decreases to just 15 minutes. After a brief summer intensity, the UV Index gradually declines into the fall and winter, returning to low levels of 3 in October and 2 in November, before settling back at 1 for December. This seasonal fluctuation highlights the need for sun protection awareness throughout the year, as outlined in the detailed guide on Slane UV Index.
UV Risk Categories
January in Slane, Ireland, greets its residents and visitors with a modest 80 hours of sunshine, a promising start to the year that hints at brighter days ahead. As the months progress, February shows a marked increase with 145 hours, ushering in a gradual awakening of spring. By March, the sun shines for a delightful 190 hours, setting the stage for the vibrant blooms of April, which boasts an impressive 308 hours of radiant sunlight. This trend of increasing illumination continues into May, reaching its peak with 385 sunny hours. The summer months hold steady with June at 379 hours and July close behind at 377 hours, providing ample opportunities for outdoor adventures. However, as autumn arrives, the sunshine begins to dwindle, with August offering 329 hours and September following suit with 288 hours. The days grow shorter in October, showcasing 226 hours, while November and December settle into quieter months with 114 and 91 hours of sunshine, respectively. Overall, the progression from January to May epitomizes a steady rise in sunlight, reflecting the vibrant transformation of the seasons in this enchanting part of Ireland.
In January, Slane, Ireland enjoys a 29% chance of sunny weather, setting a moderate tone for the month. This figure represents one of the higher probabilities during the winter, particularly when compared to the following months, where sunshine declines, notably dropping to 20% in February and 19% in March. However, as spring approaches, optimism returns with April boasting a 40% chance of sun, suggesting a delightful transition leading into the more reliably bright months ahead. The trend indicates that while January may start on a somewhat bright note, the promise of longer sunny days lies just around the corner.
In Slane, Ireland, January brings a modest 8 hours of daylight, setting the stage for a gradual transition into brighter days. As February unfolds, daylight increases to 9 hours, hinting at the longer, sunnier months ahead. By March, the length of day sees a noteworthy rise to 11 hours, while April's arrival boosts it further to 14 hours. The peak of daylight occurs in the summer months, with both June and July basking in a generous 16 hours, inviting residents and visitors alike to relish the extended evenings. However, just as nature's brightness reaches its zenith, it begins to wane, with August dropping to 14 hours and September to 12 hours. The descent continues into autumn and winter, culminating in December with only 7 hours of daylight. This cyclical pattern highlights the enchanting rhythm of seasons in Slane, where the daylight ebbs and flows, creating a unique tapestry of light and shadow throughout the year.
In January, the winds in Slane, Ireland blow at an average speed of 4.1 m/s (9 mph), setting the tone for a brisk winter. This initial gustiness is soon surpassed in February, when winds pick up to 5.4 m/s (12 mph), marking the windiest month of the early year. However, as spring approaches, March sees a slight drop to 4.4 m/s (10 mph), followed by a more noticeable decrease in April, where winds mellow to 3.2 m/s (7 mph). This trend of decreasing wind speeds continues through the early summer months, with July reaching its calmest point at just 2.6 m/s (6 mph). As autumn settles in, average winds begin to regain strength, stabilizing around 4.5 m/s (10 mph) by November and December, hinting at the cyclical nature of Slane’s weather. Overall, January's winds signal a transition from the lively gusts of winter to the more serene breezes of summer, before the cycle begins anew.
The weather in Slane 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 Slane and find detailed weather information for every month.
January and February showcase relatively similar temperatures, with average highs of 14°C (58°F) in January and 15°C (60°F) in February. However, February tends to be slightly wetter, receiving 79 mm (3.1 in) of precipitation over 15 days compared to January's 50 mm (2.0 in) over 9 days. Additionally, humidity is marginally higher in February at 86%, while January sits at 85%. This increase in precipitation and humidity might make February feel a bit more damp, even though the temperatures are only slightly warmer. For more detailed information, you can refer to Slane weather in February.
January and March exhibit notable differences in weather, despite both months experiencing similar minimum temperatures around -4°C (25°F and 26°F, respectively). In January, the average temperature is slightly lower at 6°C (43°F), while March sees a mild increase to 7°C (45°F). Maximum temperatures in March reach 17°C (63°F), a significant rise compared to January's maximum of 14°C (58°F). Precipitation is more frequent in March, with 15 days of rain contributing to a total of 76 mm (3.0 in) compared to January's 50 mm (2.0 in) over 9 days. Humidity remains high in both months, sitting at 85% in January and slightly increasing to 86% in March. For more details on March's weather patterns, you can check Slane weather in March.
In January, the weather is considerably colder, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 14°C (58°F) and an average of 6°C (43°F). The month sees around 50 mm of precipitation over 9 days, maintaining a humidity level of 85%. In contrast, April experiences a milder climate, with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 20°C (69°F), and an average of 9°C (48°F). Precipitation slightly decreases to 44 mm over 10 days, while humidity remains consistent at 85%. For more detailed insights about April weather in Slane, you can visit Slane weather in April.
In January, the weather is quite chilly with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 14°C (58°F), and an average of 6°C (43°F). The month experiences around 50 mm (2.0 in) of precipitation over approximately 9 days, accompanied by high humidity levels at 85%.
By contrast, May brings a significant warming trend, with temperatures ranging from -1°C (31°F) to a much warmer maximum of 24°C (75°F), and an average of 12°C (53°F). Although May sees slightly more rainfall with 64 mm (2.5 in) of precipitation occurring over about 12 days, the humidity remains comparable at 83%. For more detailed information about May weather, you can check Slane weather in May.
In January, the weather is notably colder, with temperatures ranging from a frigid minimum of -4°C (25°F) to a mild maximum of 14°C (58°F) and an average of 6°C (43°F). The month experiences around 50 mm (2.0 in) of precipitation over 9 days, accompanied by high humidity levels at 85%. In contrast, June ushers in warmer weather, with temperatures starting at a minimum of 5°C (41°F) and peaking at 28°C (83°F), averaging 15°C (59°F). The rainfall also increases slightly to 73 mm (2.9 in) over 14 days, yet the humidity remains steady at 85%. For a closer look at what to expect during June, check out Slane weather in June.
In January, temperatures in Slane range from a chilly -4°C (25°F) to a mild 14°C (58°F), with an average of 6°C (43°F). The month typically sees around 50 mm (2.0 in) of precipitation over approximately 9 days, accompanied by high humidity levels at 85%. In contrast, July brings warmer weather, with temperatures varying from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), and an average temperature of 16°C (62°F). Precipitation increases to 73 mm (2.9 in) across about 13 days, while humidity remains similar at 86%. For more details about July conditions, you can check Slane weather in July.
The weather in January is significantly colder than in August, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 14°C (58°F). In contrast, August experiences milder conditions, with temperatures varying from a minimum of 7°C (44°F) to a maximum of 23°C (73°F). While both months share the same humidity level of 85%, August sees more precipitation—104 mm (4.1 in) over 17 days, compared to January's 50 mm (2.0 in) over 9 days. For a detailed look at the weather specifics in August, you can check Slane weather in August.
In January, the weather is notably chillier with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 14°C (58°F), averaging around 6°C (43°F). The month sees about 50 mm (2.0 in) of precipitation over 9 days, with humidity levels at 85%. In contrast, September brings a much milder climate, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 23°C (73°F) and an average of 14°C (57°F). Although there is more precipitation at 71 mm (2.8 in) over 11 days, humidity remains slightly higher at 86%. For more details on September weather, visit Slane weather in September.
January and October present distinct weather patterns, showcasing the transition from winter to autumn. In January, temperatures range from a chilly -4°C (25°F) at night to a mild 14°C (58°F) during the day, with an average of 6°C (43°F). This month experiences about 50 mm (2.0 inches) of precipitation over nine days, accompanied by high humidity levels at 85%. In contrast, October sees milder temperatures, with nighttime lows of 1°C (33°F) and daytime highs reaching 20°C (68°F), averaging 11°C (52°F). Precipitation increases to 76 mm (3.0 inches) across 13 days, while humidity remains slightly higher at 87%. For more details on October weather, you can visit Slane weather in October.
In January, temperatures range from a chilly -4°C (25°F) at their lowest to a more moderate 14°C (58°F) at their highest, with an average temperature of 6°C (43°F). In contrast, November experiences slightly milder conditions, with minimum temperatures of -2°C (28°F) and a maximum of 15°C (60°F), yielding an average of 8°C (47°F). Precipitation is notably higher in November, measuring 83 mm (3.3 in) over 14 days, compared to January's 50 mm (2.0 in) spread over 9 days, while humidity levels remain quite similar at 85% in January and 86% in November. For more detailed information, visit Slane weather in November.
In January, the weather tends to be slightly colder than in December, with minimum temperatures dropping to -4°C (25°F) compared to December's minimum of -2°C (28°F). Both months share an average temperature of around 6°C (43°F), but January can reach a maximum of 14°C (58°F), slightly warmer than December's high of 13°C (56°F). Precipitation is also less plentiful in January, with 50 mm (2.0 in) falling over roughly 9 days, whereas December sees more rain, totaling 85 mm (3.4 in) over 14 days. Humidity levels are relatively similar—85% in January and 84% in December. For more detailed information, check Slane weather in December.
January in Slane is a month of contrasts, as it marks the coldest time of the year with its chilly temperatures and high humidity levels. Unlike the milder months, it often experiences noteworthy precipitation, with nearly a third of the month bringing rain, creating a damp atmosphere. The chill in the air can be biting, especially at night, when temperatures can drop significantly. While the scenery may be draped in winter's embrace, the unique character of January offers a blend of tranquility and beauty that sets it apart from the more vibrant seasons. For a deeper understanding of weather patterns throughout the year, explore Slane Climate.