December Weather in Castro, Spain

Last updated: February 6, 2025

December in Castro, Spain, brings a notable chill with temperatures ranging from a maximum of 16°C (62°F) to a minimum of -4°C (26°F), resulting in an average temperature of 8°C (46°F). This month is characterized by heightened humidity levels at 85%, creating a crisp atmosphere. Rainfall is also significant, with 161 mm (6.3 in) of precipitation spread across 16 days, making it one of the wetter months of the year. Visitors can expect a blend of brisk days and occasional downpours, perfect for exploring Castro’s winter charm and scenic landscapes.

December Temperature in Castro

In December, temperatures in Castro, Spain, start to dip as winter sets in, showcasing a blend of chilly mornings and crisp afternoons. With minimums reaching -4°C (26°F), the month welcomes the season with a frosty embrace. The average temperature hovers around 8°C (46°F), offering a cool respite from the milder conditions of fall. As the day progresses, the maximum temperature typically peaks at 16°C (62°F), allowing for pleasant midday outings amid the serene winter landscape. In comparison to the preceding months, December's temperatures reflect a gradual decline, paving the way for the coldest days of the year ahead while still providing opportunities to enjoy the fresh, invigorating air of the season.

December Weather in Castro: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Castro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434748525761666663564846
Data source: Temperature data for Castro generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Castro

December in Castro, Spain, marks a significant uptick in precipitation, with an impressive 161 mm (6.3 in) of rain falling over 16 days. This month stands out not only for its quantity but also for the consistency of rain, reinforcing December's reputation as one of the wettest months of the year. The increase in precipitation compared to the previous months, particularly November’s 120 mm (4.7 in), sets the tone for a winter finale that deepens the region's serene landscape. As temperatures cool, the shift in weather patterns often brings about a cozy atmosphere ideal for reflection, highlighting the contrast to the drier summer months, where July recorded only 27 mm (1.1 in) across just 7 days. This seasonal transformation undoubtedly enriches the local ecosystem, serving as a reminder of nature's rhythm in Castro.

December Precipitation Trends in Castro

The chart displays monthly precipitation patterns in Castro, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec7910711682796627364696120161
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Castro

As the year draws to a close in Castro, Spain, December sees a notable rise in humidity levels, reaching 85%. This increase marks a slight upward trend from the preceding months, where humidity levels hovered between 78% and 84%. Throughout the year, humidity remains relatively high, particularly in the winter months, with January and November each at 84%. Interestingly, the summer months, especially August, yield the lowest humidity levels, dipping to 78%. Overall, December stands out as the time when moisture in the air is most pronounced, suggesting a shift towards a more humid environment as the region embraces the chill of winter.

December Average Humidity in Castro

This chart illustrates the average monthly humidity levels in Castro, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%83%83%83%82%78%79%82%84%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castro

In December, the UV Index in Castro, Spain, drops to a low level of 2, allowing for a more relaxed outdoor experience with a burn time extending to 45 minutes. This marks a notable decrease from the peak summer months when the Index soared to extreme levels, with values reaching as high as 11 in June. As the year progresses from winter to summer, we observe a clear trend: the UV Index rises significantly, peaking in the warmest months before tapering off again in the cooler seasons. Despite December’s lower UV exposure, it still serves as a gentle reminder to stay mindful of sun protection. If you're keen on exploring more about UV levels throughout the year, check out the comprehensive data at Castro UV Index.

Maximum UV Index Levels in Castro for December

The chart shows the monthly maximum UV Index (UVI) for Castro in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098632
Data source: Castro December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Castro

In Castro, Spain, December brings a gentle decline in sunshine, with 191 hours illuminating the month. Following the vibrant summer months, where July shines the brightest with 421 hours, the year gradually transitions into shorter days. As the autumn leaves fall, sunlight begins to wane, dipping from the 338 hours seen in September to the more subdued December figure. This downward trend highlights how the sun's presence ebbs, yet even in winter's grasp, Castro's charm remains radiant, offering a cozy respite amid the cooler temperatures. The year's cyclical dance of light reveals the unique allure of each season, making every moment spent in this beautiful coastal town a treasure, even as the days grow shorter.

Monthly Sunshine Duration in Castro: December Highlighted

The December sunshine duration represents the total number of hours Castro experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec170h230h299h337h390h387h421h392h338h298h228h191h
Data source: Castro December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Castro During December

In December, the likelihood of sunny weather in Castro, Spain stands at 32%, placing it among the lower probabilities of the year. This trend continues from November, which features a slightly higher chance of sun at 42%. As we look back over the months, it's clear that the transition from autumn to winter brings a notable dip in sunshine, with the highest chances occurring during the summer months of August (53%) and July (43%). Comparatively, early winter months like December and January remain generally overcast, reinforcing the seasonal shift toward cooler and cloudier weather. Thus, while the sun does appear occasionally, visitors should prepare for a mix of mild winter days rather than a guarantee of bright skies.

Percentage of Sunny Days in December in Castro

The chart illustrates the percentage of sunny days in Castro throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Castro experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec33%16%50%39%33%42%43%53%33%37%42%32%
Data source: Castro December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Castro in December

In Castro, Spain, the daylight duration exhibits a fascinating rhythm throughout the year, peaking in the summer months and dipping again into the depths of winter. December, mirroring January with about 9 hours of daylight, signals the onset of shorter days as the year winds down. Following a gradual increase starting in February, daylight stretches to its maximum in June with 15 hours of sunshine, allowing locals and visitors alike to revel in the warm embrace of summer. As the days gradually shorten again, the cycle returns to 9 hours by December, offering a stark reminder of nature's seasonal ebb and flow. This rhythmic pattern not only influences daily activities but also enriches the local culture, celebrating the unique charm of each season.

Average Daylight Hours in Castro for December

The chart illustrates the variation in daylight duration in Castro throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 25m10h 32m11h 57m13h 24m14h 38m15h 15m14h 56m13h 50m12h 26m10h 59m9h 43m9h 4m
Data source: Castro daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Castro

In December, the winds in Castro, Spain pick up a bit of momentum, matching the average speed seen in January at 3.4 m/s (8 mph). This subtle uptick signals an intriguing shift as the year draws to a close, contrasting with the quieter winds of the summer months, which lingered around 2.3 to 2.8 m/s. The trend reveals a gradual pattern of increasing wind speeds throughout the fall, peaking in late autumn and early winter. As the chill of December embraces the region, these brisk winds set the stage for a refreshing coastal experience, ideal for invigorating strolls along the shore or cozy gatherings by the fire. Overall, December not only defies the stillness of summer but also rejuvenates the air with a lively breeze, inviting both locals and visitors to revel in its spirited charm.

Average December Wind Speed in Castro

The chart displays monthly wind speed patterns in Castro, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.44.12.72.53.12.82.62.32.42.62.83.4 m/s
Data source: Castro December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Castro Compares to Other Months

The weather in Castro 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 Castro and find detailed weather information for every month.

December typically experiences milder temperatures compared to January, with average highs reaching 16°C (62°F) and lows around -4°C (26°F). The month sees significant precipitation, totaling 161 mm (6.3 in) over 16 days, contributing to a relatively high humidity level of 85%. In contrast, January has slightly cooler temperatures, with an average high of 19°C (67°F) and a low of -5°C (23°F). Precipitation decreases significantly to 79 mm (3.1 in) over just 10 days, resulting in a humidity of 84%. For more detailed insights on January weather conditions, visit Castro weather in January.

In December, the weather is characterized by a colder climate, with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 16°C (62°F), averaging around 8°C (46°F). This month also sees significant precipitation, totaling 161 mm (6.3 in) over 16 days, accompanied by high humidity at 85%. In contrast, February experiences slightly milder temperatures, with a minimum of -3°C (27°F) and a maximum of 21°C (70°F), while maintaining a similar average of 8°C (47°F). Precipitation decreases to 106 mm (4.2 in) over just 12 days, and humidity drops slightly to 83%. For more detailed insights on February weather, you can visit Castro weather in February.

In December, temperatures range from a minimum of -4°C (26°F) to a maximum of 16°C (62°F), with an average of 8°C (46°F). This month experiences significant precipitation, totaling 161 mm (6.3 in) over approximately 16 days, accompanied by a high humidity level of 85%. In contrast, March brings a slightly milder climate, with temperatures ranging from -4°C (26°F) at night to a much warmer average of 9°C (48°F) and a maximum of 24°C (75°F) during the day. Precipitation decreases to 116 mm (4.6 in) spread across 14 days, and humidity also sees a slight drop to 82%. For more detailed information about the weather in March, you can refer to Castro weather in March.

In December, the weather tends to be quite chilly, with average temperatures ranging from a minimum of -4°C (26°F) to a maximum of 16°C (62°F). This month sees significant precipitation, totaling 161 mm (6.3 in) over approximately 16 days, accompanied by high humidity at around 85%. In contrast, April experiences a more moderate climate, with average temperatures from -3°C (26°F) to a warmer maximum of 25°C (77°F). The precipitation decreases to 82 mm (3.2 in) over 13 days, while humidity slightly drops to 83%. For those interested in more details about April weather, you can visit Castro weather in April.

December and May present contrasting weather profiles that reveal the seasonal shifts in temperature and precipitation. In December, temperatures range from a chilly -4°C (26°F) at their lowest to a milder 16°C (62°F) at their peak, averaging around 8°C (46°F). This month is characterized by significant precipitation, totaling 161 mm (6.3 in) over 16 days, accompanied by high humidity levels at 85%. In contrast, May showcases a much warmer atmosphere, with temperatures starting at a minimum of 1°C (35°F) and soaring up to 30°C (86°F), averaging 14°C (58°F). The rainfall in May is considerably less, with only 79 mm (3.1 in) occurring over 12 days, and humidity slightly lower at 83%. For a more detailed look at May's weather in the region, visit Castro weather in May.

December and June present distinctly different weather experiences. December features chilly temperatures, with lows dipping to -4°C (26°F) and an average of 8°C (46°F), while the month can expect significant precipitation at 161 mm (6.3 in) over 16 days, accompanied by high humidity at 85%. In contrast, June warms up considerably, boasting temperatures that range from a minimum of 4°C (40°F) to a maximum of 33°C (92°F), with a comfortable average of 16°C (62°F). Precipitation in June is lighter, totaling 66 mm (2.6 in) over 12 days, and humidity remains relatively high but slightly lower at 83%. For more specific insights into June weather, check out Castro weather in June.

December and July present stark contrasts in weather. December features chilly temperatures, with a minimum of -4°C (26°F) and an average of 8°C (46°F), reaching a maximum of 16°C (62°F). The month is characterized by significant precipitation, totaling 161 mm (6.3 in) across 16 days, and relatively high humidity at 85%. In contrast, July basks in warmth, with temperatures ranging from a minimum of 7°C (45°F) to an average of 19°C (66°F), peaking at a hot 33°C (91°F). Precipitation is minimal during this month, recorded at only 27 mm (1.1 in) over 7 days, with humidity slightly lower at 82%. For a more detailed look at July weather, visit Castro weather in July.

In December, temperatures are significantly cooler, ranging from a minimum of -4°C (26°F) to a maximum of 16°C (62°F), with an average around 8°C (46°F). The month also experiences relatively high humidity at 85% and substantial precipitation, totaling 161 mm (6.3 in) over 16 days. In contrast, August offers much warmer weather, with temperatures varying from a minimum of 8°C (47°F) to a maximum of 35°C (95°F), averaging 19°C (66°F). The summer month is drier, with only 36 mm (1.4 in) of precipitation over just 6 days, and a lower humidity level of 78%. For more details on August weather, check Castro weather in August.

December and September present strikingly different weather patterns. In December, temperatures range from a chilly minimum of -4°C (26°F) to a mild maximum of 16°C (62°F), with an average temperature of 8°C (46°F). The month is characterized by high humidity at 85% and significant precipitation of 161 mm (6.3 in) over 16 days. In contrast, September enjoys much warmer temperatures, with a minimum of 3°C (38°F) and a maximum reaching up to 33°C (92°F), averaging 17°C (63°F). Additionally, it experiences significantly less rain, with only 46 mm (1.8 in) across 9 days and slightly lower humidity at 79%. For more details on September weather, you can visit Castro weather in September.

In comparing the weather between October and December, October typically experiences milder temperatures, with a minimum of 2°C (35°F) and an average of 14°C (57°F), peaking at 30°C (87°F). In contrast, December drops significantly, featuring a minimum of -4°C (26°F) and an average temperature of 8°C (46°F), with a maximum of only 16°C (62°F). Additionally, December sees more precipitation, with 161 mm (6.3 in) over 16 days, compared to October's 96 mm (3.8 in) over 12 days. Humidity levels are also slightly higher in December at 85%, compared to October's 82%. For a more detailed overview of October's weather, you can visit Castro weather in October.

In comparing the weather of November and December, December tends to be slightly cooler, with average temperatures ranging from a minimum of -4°C (26°F) to a maximum of 16°C (62°F), while November features a milder range with minimums of -1°C (31°F) and maximums reaching 19°C (67°F). Additionally, December experiences higher precipitation levels at 161 mm (6.3 in) over 16 days, compared to November's 120 mm (4.7 in) across 15 days. Humidity levels remain similar, with December at 85% and November at 84%. For more detailed insights on November weather, you can visit Castro weather in November.

Compare Castro's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Castro

December in Castro marks a distinct shift from the milder months, as temperatures dip and precipitation increases, creating a chilly and often wet atmosphere. With an average temperature around 8°C (46°F), residents can expect several days of rain, averaging 16 days throughout the month, contributing to a relatively high humidity level of 85%. This transition to winter brings forth a stark contrast to the warmer, drier months, making December a time for cozy indoor activities and preparation for the festive season. For a more detailed understanding of the region's weather patterns, check out Castro Climate.