Last updated: March 17, 2025
In December, Castlebar, Ireland experiences a cool and damp climate, characterized by a maximum temperature of 13°C (55°F) and an average temperature of 7°C (44°F). The month sees a notable drop in temperatures, with minimums reaching as low as -3°C (27°F). Frequent rainfall is common, accumulating to roughly 121 mm (4.8 in) over 19 days, contributing to a high humidity level of 89%. This combination of chill and moisture creates a distinctly atmospheric winter environment, perfect for cozy gatherings and festive cheer.
In Castlebar, Ireland, December ushers in the chill of winter with temperatures typically ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F). As the month unfolds, the average temperature hovers around 7°C (44°F), providing a stark contrast to the milder conditions of earlier months. The drop in temperatures is not just a seasonal shift; it marks the onset of colder weather that begins in earnest from November, where temperatures also dipped to a minimum of -2°C (29°F). This trend underscores a gradual decline, as the year transitions from the warmth of late autumn into the brisk embrace of winter. While December may be chilly, it also brings a cozy charm to Castlebar, setting the stage for festive celebrations amidst the frost.
December in Castlebar, Ireland, witnesses a notable shift in weather, with precipitation levels averaging around 121 mm (4.8 in) over 19 days of the month. This marks a slight dip from the wetter November, which recorded 110 mm while having a comparable number of rainy days. As winter fully settles in, December's precipitation is higher than many earlier months, reinforcing the trend of increased rainfall towards the end of the year. With both colder temperatures and rising humidity, the landscape transitions dramatically into a winter wonderland, offering a tranquil yet often soggy atmosphere for locals and visitors alike.
In Castlebar, Ireland, December sees a notable humidity level of 89%, which fits into a broader trend of elevated moisture throughout the year. While the months leading up to December exhibit a gradual increase in humidity, peaking at 92% in November, the winter month signifies a slight dip yet remains comfortably high compared to earlier months like April and May. Notably, January and February hold steady at 88%, setting a precedent for the cold season. This consistent humidity reflects the region's maritime climate, where moist air predominates, creating a landscape that feels both fresh and invigorating during the holiday season.
As the year draws to a close, December in Castlebar, Ireland experiences a UV Index of 1, reflecting a low exposure category with a burn time of 45 minutes. This trend of lower UV levels continues from November, which also registered an Index of 2, making mid-winter months generally safe for outdoor activities without significant sun protection concerns. In contrast, as we move through the earlier months of the year, the UV Index rises sharply, peaking at 8 during the summer in June and July, indicative of the strong sunlight during that season. Keeping track of the UV Index is essential for planning safe outdoor activities year-round. For detailed insights, check out the full Castlebar UV Index.
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In Castlebar, Ireland, the December sunshine brings a gentle reminder of the shorter days and the seasonal shift. With only 91 hours of sunshine, December marks one of the year's lowest points, following the gradual decline from the vibrant 396 hours in May. As winter settles in, the sunshine dwindles swiftly from November’s 114 hours, highlighting a dramatic contrast to the 316 hours basked in during April. This trend underscores the charm of Castlebar’s winter months, where each glimmer of sunlight is cherished before spring's return promises a revival of brightness and vitality. The ebb and flow of sunshine throughout the seasons reflect the beauty of nature's rhythm, inviting both locals and visitors to appreciate the unique warmth of December, albeit in its more limited form.
In Castlebar, Ireland, the likelihood of basking in sunny weather dramatically diminishes as the year approaches December, with a mere 13% chance of sunshine. This trend represents one of the lowest probabilities for brightness throughout the entire year, following a slight uptick in sun chances from the spring months. While April shines with a promising 40% likelihood of sunny days, the summer months show little improvement, with July and August hovering around 23% and 19% respectively. As autumn gives way to winter, the chance of sunlight transitions into a steady decline, peaking at 22% in November before dropping off significantly in December. This pattern illustrates that those hoping for a bright holiday season should prepare for the overcast skies typical of this time of year.
In Castlebar, Ireland, the daylight duration follows a fascinating ebb and flow throughout the year, peaking in the lush summer months. January and November share a modest 8 hours of sunlight, while February sees a hopeful increase to 9 hours. As spring approaches, daylight extends significantly, reaching a vibrant 14 hours by April and peaking at 16 hours in June and July—the sunniest months. However, as autumn edges in, sunlight dwindles, with August enjoying 14 hours and gradually decreasing to 12 hours in September. By the time we reach December, daylight has contracted to just 7 hours, marking the year’s shortest days. This rhythm of light and dark paints a vivid picture of the seasons, accentuating Ireland’s natural beauty in a cycle of brightness and soft dusk.
As winter sets in, December brings a noticeable shift in wind patterns across Castlebar, Ireland. With an average wind speed of 4.7 m/s (10 mph), December marks a peak compared to the earlier months, reflecting a gradual increase in windiness as the year progresses. This uptick, consistent with November's 4.3 m/s (10 mph), highlights the transition into harsher winter conditions, while contrasting with the milder summer months, particularly July's calm 2.6 m/s (6 mph). The winds of December often carry a brisk chill, reminding locals of the vibrant shifts in the Irish climate as they prepare for the frostier days ahead. Overall, December's winds encapsulate a blend of increased strength and winter's embrace in Castlebar, serving as a gateway to the season's chillier charm.
The weather in Castlebar changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Castlebar and find detailed weather information for every month.
December and January both feature cold temperatures, with minimums around -3°C (27°F) and average highs slightly varying; December sees an average of 7°C (44°F), while January is slightly cooler at 6°C (43°F). January, however, enjoys less precipitation, with 87 mm (3.4 in) over 13 days compared to December's 121 mm (4.8 in) over 19 days. The humidity remains similar, at 89% in December and a touch less at 88% in January. For more specific insights into January’s weather patterns, check out Castlebar weather in January.
In comparing the weather of December and February, we see some similarities and slight variations. Both months feature a minimum temperature around -3°C (27°F), but February tends to be marginally warmer with an average temperature of 6°C (43°F) compared to December's 7°C (44°F). Max temperatures in February also reach a higher peak, with 15°C (59°F) versus December's 13°C (55°F). Precipitation is quite consistent, with February experiencing slightly more at 135 mm (5.3 in) compared to December's 121 mm (4.8 in), although the number of rainy days remains similar at 18 and 19. Humidity levels are comparable, with February at 88% and December at 89%. For a detailed perspective on the February weather, you can check out Castlebar weather in February.
In December, the weather can be quite chilly, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F). The month typically experiences significant precipitation, averaging 121 mm (4.8 in) over 19 days, accompanied by high humidity levels of 89%. Conversely, March exhibits slightly colder temperatures, with a minimum of -5°C (24°F) and a maximum of 17°C (62°F), yet it has a similar average temperature of 7°C (44°F). Precipitation in March is slightly less, measuring 107 mm (4.2 in) over 16 days, and humidity remains fairly consistent at 87%. For a detailed look at March weather conditions, you can visit Castlebar weather in March.
December and April exhibit notable differences in weather conditions. December’s temperatures range from a chilly minimum of -3°C (27°F) to a maximum of 13°C (55°F), with an average of 7°C (44°F). The month is characterized by significant precipitation, amounting to 121 mm (4.8 in) over 19 days, contributing to a high humidity level of 89%. In contrast, April sees a milder climate, with temperatures spanning from -2°C (28°F) to 20°C (69°F) and an average of 9°C (48°F). The precipitation in April is considerably less, totaling 63 mm (2.5 in) over just 11 days, and humidity remains slightly lower at 86%. For a detailed look at weather patterns specific to April, visit Castlebar weather in April.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F). The month sees significant precipitation, averaging around 121 mm (4.8 in) over 19 days, and high humidity at 89%. In contrast, May brings a more comfortable climate with temperatures fluctuating between -2°C (29°F) and 25°C (77°F), averaging around 11°C (53°F). Precipitation is lower in May at 74 mm (2.9 in) across 14 days, and humidity also decreases to 83%. For a detailed look at the weather conditions in May, you can check Castlebar weather in May.
December and June showcase distinct weather contrasts. In December, temperatures dip as low as -3°C (27°F) and hover around an average of 7°C (44°F), with a maximum reach of 13°C (55°F). The month is characterized by significant precipitation, totaling 121 mm (4.8 in) over 19 days, accompanied by high humidity levels at 89%. In contrast, June experiences milder temperatures, with a minimum of 5°C (41°F), an average of 13°C (56°F), and a peak of 28°C (84°F). Precipitation decreases to 87 mm (3.4 in) across 17 days, and humidity slightly lowers to 83%. For more details on the weather in June, check out Castlebar weather in June.
In December, temperatures in Castlebar can drop to a minimum of -3°C (27°F), with an average of 7°C (44°F) and a maximum of 13°C (55°F). The month experiences significant precipitation, with 121 mm (4.8 in) of rainfall spread over 19 days and high humidity levels at 89%. In contrast, July brings milder temperatures, ranging from a low of 7°C (44°F) to an average of 15°C (59°F) and peaks at 28°C (83°F). Precipitation is lower at 91 mm (3.6 in), occurring over 15 days, and humidity is slightly reduced at 85%. This stark contrast highlights the colder, wetter weather of December compared to the warmer, drier conditions in July. For more detailed information, you can check Castlebar weather in July.
December weather features colder temperatures, with a minimum of -3°C (27°F) and an average of 7°C (44°F), while August offers much milder conditions, starting at a minimum of 6°C (43°F) and averaging 15°C (59°F). Precipitation is relatively high in both months, with December receiving 121 mm (4.8 in) over 19 days, compared to August's 133 mm (5.3 in) over 21 days. Humidity levels are slightly higher in December at 89%, compared to August’s 85%, contributing to the overall chill of the winter month. For those interested in a more detailed look at August weather, please check Castlebar weather in August.
In comparing the weather between December and September, one can observe notable differences in temperature and precipitation. December features a chillier temperature range, with minimums dropping to -3°C (27°F) and average highs reaching only 13°C (55°F). In contrast, September offers a milder climate, with temperatures ranging from a minimum of 2°C (35°F) to a comfortable average high of 25°C (77°F). While both months experience considerable precipitation, December sees a higher total of 121 mm (4.8 in) over 19 days, compared to September's 92 mm (3.6 in) over 17 days. Humidity levels remain similar, hovering around 88-89%. For more information about September weather specifically in Castlebar, you can visit Castlebar weather in September.
December weather exhibits cooler temperatures compared to October, with average highs of 13°C (55°F) in December, as opposed to October's warmer maximum of 20°C (68°F). The minimum temperature in December can drop to -3°C (27°F), while October starts with a milder minimum of 0°C (33°F). Precipitation levels are fairly similar, with December receiving 121 mm (4.8 in) over 19 days and October slightly higher at 127 mm (5.0 in) across 20 days. Humidity remains relatively high in both months, with December at 89% and October at 91%. For more detailed information, you can check Castlebar weather in October.
In comparing the weather between November and December, December tends to be slightly colder with average temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (55°F), while November has a slightly warmer average, with temperatures ranging from -2°C (29°F) to 15°C (59°F). Both months experience substantial rainfall, with December seeing 121 mm (4.8 in) of precipitation across 19 days, compared to November's 110 mm (4.3 in) over 17 days. Humidity is notably high during both months, peaking at 89% in December and 92% in November. For more detailed information on November's weather specifics, you can refer to Castlebar weather in November.
As December sets in, Castlebar transforms into a wintery haven, characterized by a significant drop in temperatures and an increase in humidity. Unlike the milder months of autumn, December typically experiences chilly days with temperatures dipping to a brisk average of 7°C. The prevalence of rainy days, with about 19 days seeing precipitation, contributes to the region's lush landscapes, albeit at the cost of cozy indoor settings. If you’re planning a visit, be sure to embrace the cozy charm of Castlebar during this unique winter month. For a deeper look into annual trends, check out Castlebar Climate.