Last updated: February 6, 2025
In September, Castro-Urdiales, Spain, boasts a delightful climate characterized by a maximum temperature reaching 29°C (84°F) and a comfortable average of 20°C (67°F). However, visitors should prepare for occasional rain, as the region experiences about 80 mm (3.2 in) of precipitation over 12 days during the month. The air remains quite humid, averaging 77%, which adds to the pleasant Mediterranean feel. Whether enjoying the beaches or exploring the charming town, September offers a perfect backdrop for a memorable getaway.
As September settles in Castro-Urdiales, the lingering warmth of summer still envelops the region, showcasing an inviting climate that beckons outdoor activities. With minimum temperatures around 13°C (56°F) and an average hovering at 20°C (67°F), the month feels pleasantly mild. The days are often kissed by the sun, peaking at a maximum of 29°C (84°F), making it an ideal time for beach outings and seaside strolls. This gradual shift from the soaring summer highs to cooler autumn nights marks a delightful transition, where the comfort of warmer days meets the promise of crisp evenings, enriching the local atmosphere and inviting both residents and visitors to savor the beauty of early autumn by the sea.
September in Castro-Urdiales marks a subtle transition in the weather patterns, featuring an average precipitation of 80 mm (3.2 in) over approximately 12 days. This amount represents a slight increase compared to the summer months, where rainfall dipped to 54 mm (2.1 in) in both July and August. As the warm days of summer give way to the cooler embrace of autumn, September's precipitation paves the way for a refreshing change. While it remains a relatively moderate month, the rainfall signals the approaching wetter season ahead, with October's totals leaping to 117 mm (4.6 in), and November reaching a significant 189 mm (7.5 in). Thus, September serves as a pivotal point, bridging the drier summer with the impending autumn rains, creating a lush backdrop for the region's transitioning landscape.
In September, Castro-Urdiales experiences a notable dip in humidity, with levels averaging around 77%. This marks the lowest point of the year, following a peak in July at 87%. As summer gives way to autumn, the transition is reflected in the humidity trends: August maintains a comfortable 82%, but the drop in September heralds a shift towards the drier months ahead. Interestingly, this decrease is part of a broader trend, as humidity steadily declines from earlier months, which range between 81% to 85%. The shift towards more moderate humidity levels not only makes for pleasant outdoor experiences but also hints at the approaching cooler months in Castro-Urdiales.
As summer fades into autumn in Castro-Urdiales, Spain, the UV Index begins to show a noticeable decline. In September, the UV Index stands at 7, categorizing it as high with a burn time of 25 minutes—a slight decrease from the peak summer months, which display indexes of 9 and 10. This shift reflects a transition from the intense sun exposure of July and August to more moderate conditions, with October following closely behind at 5. It's essential to remain vigilant, as the UV levels can still pose risks, particularly for those spending extended time outdoors. For more detailed information on UV exposure throughout the year, explore Castro-Urdiales UV Index.
UV Risk Categories
September in Castro-Urdiales, Spain, showcases a delightful transition towards autumn, basking in 336 hours of sunshine. This month is part of a radiant summer trend, with long days peaking in July at 408 hours before gently declining into fall. As the warmth lingers, September offers a perfect blend of sunny days, reminiscent of the vibrant summer months yet slightly cooler, inviting locals and visitors alike to savor the beaches and scenic vistas. The gradual dimming of daylight, paired with a glimpse of the colorful autumn foliage, creates a unique atmosphere that beautifully encapsulates the essence of early fall.
In September, the likelihood of sunny weather in Castro-Urdiales, Spain stands at a moderate 31%, indicating a pleasant transition from summer to autumn. While this percentage represents a slight decline from the sunnier months of July and August, which both enjoy a 40% chance of sunshine, it remains favorable compared to the earlier spring months. Following a consistent trend, the possibility of clear, bright days continues throughout the month, making September a delightful time for outdoor activities, albeit with the potential for early autumn showers. Overall, visitors can expect a balanced mix of sun and cloud, perfect for enjoying the scenic coastal landscape.
As summer fades, September in Castro-Urdiales, Spain offers a delightful transition, showcasing approximately 12 hours of daylight. This gradual reduction from the peak of 15 hours in June and July signals the approach of autumn. The daylight hours, which start at a modest 9 hours in January, steadily rise through the spring, culminating in the lush days of May and June. Following the vibrant summer, September's light begins to wane, reflecting a gentle shift toward shorter days as the year progresses into the cooler months of October and November. This rhythmic cycle not only enhances the charm of the seaside town but also prepares residents and visitors alike for the colorful fall ahead.
As summer transitions to autumn in Castro-Urdiales, September brings a gentle breeze with an average wind speed of 3.4 m/s (8 mph), slightly up from the languid summer months but still mild. This reflects a gradual shift, with wind speeds typically increasing as the year progresses, peaking in winter. Throughout the year, wind is generally stronger in early months, with January and February averaging 5.1 m/s (11 mph), while the late summer months demonstrate a noticeable calm. The overall trend showcases a seasonal rhythm where wind speed ebbs and flows, offering a serene yet vibrant atmosphere perfect for enjoying the coastal charm of this picturesque town.
The weather in Castro-Urdiales changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Castro-Urdiales and find detailed weather information for every month.
September and January present notably different weather patterns. In September, temperatures range from a mild 13°C (56°F) at night to a warm average of 20°C (67°F) during the day, peaking at a comfortable 29°C (84°F). Additionally, the month experiences around 80 mm (3.2 in) of rainfall over approximately 12 days, with humidity levels at 77%. In contrast, January is much cooler, with temperatures dipping to a minimum of 3°C (38°F) and averaging 10°C (50°F), reaching a maximum of only 20°C (68°F). Rainfall increases to 125 mm (4.9 in) over about 14 days, alongside a higher humidity level of 85%. For a more detailed look at January's weather, you can visit Castro-Urdiales weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a mild 13°C (56°F) at night to a warm 29°C (84°F) during the day, with an average of 20°C (67°F). The month experiences about 80 mm (3.2 in) of precipitation over 12 days, along with a relatively high humidity of 77%. In stark contrast, February offers cooler weather, with minimum temperatures dropping to 2°C (36°F) and maximums reaching only 20°C (69°F), averaging 11°C (53°F). This month sees more precipitation at 106 mm (4.2 in) spread over 13 days, with slightly higher humidity at 83%. Overall, February is noticeably cooler and wetter than September. For more detailed information, visit Castro-Urdiales weather in February.
In September, the weather tends to be warmer with an average temperature of 20°C (67°F) and a maximum of 29°C (84°F), making it a more summery month. In contrast, March experiences cooler temperatures, averaging 12°C (53°F), with daytime highs around 21°C (70°F). Both months see significant precipitation, but September has slightly less rainfall (80 mm) compared to March (93 mm), although March has more rainy days—16 compared to September's 12. Additionally, humidity levels in both months are relatively high, with September at 77% and March at 82%. For more detailed weather insights, visit Castro-Urdiales weather in March.
In comparing the weather between September and April, we can observe distinct differences in temperature and conditions. September boasts warmer temperatures, with averages ranging from a minimum of 13°C (56°F) to a maximum of 29°C (84°F), whereas April is notably cooler, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 22°C (72°F). Precipitation levels are fairly similar, with September experiencing 80 mm (3.2 in) over 12 days and April recording 79 mm (3.1 in) over 13 days. Humidity is slightly higher in April at 81%, compared to 77% in September. For a more detailed look at April weather in Castro-Urdiales, visit Castro-Urdiales weather in April.
When comparing the weather in September to that of May, a noticeable difference in temperature is evident. September typically enjoys warmer conditions, with average temperatures reaching around 20°C (67°F) and maximums peaking at 29°C (84°F). In contrast, May is cooler, with an average temperature of about 15°C (60°F) and a maximum of 25°C (78°F).
Precipitation patterns also vary, as September experiences around 80 mm (3.2 in) over 12 days, while May sees slightly less rainfall at 72 mm (2.8 in) across 15 days. Additionally, humidity levels are quite similar, with September at 77% and May slightly higher at 81%.
For more detailed insights into May weather, check out Castro-Urdiales weather in May.
When comparing the weather in September and June, we see some notable similarities and differences. Both months experience a maximum temperature of 29°C (84°F), providing warm days, while September boasts a slightly higher average temperature of 20°C (67°F) compared to June's 18°C (65°F). Precipitation levels are nearly identical, with September receiving 80 mm (3.2 in) over 12 days, just slightly less than June's 81 mm (3.2 in) across 14 rainy days. Humidity is a bit lower in September at 77%, while June experiences a higher humidity level of 83%. For more detailed insights on June weather, you can refer to Castro-Urdiales weather in June.
When comparing the weather in September and July, we see that both months share a similar average temperature of around 20°C (68°F). However, July tends to be slightly warmer, with maximum temperatures reaching 30°C (86°F) compared to September's peak of 29°C (84°F). Additionally, July experiences less rainfall, with 54 mm (2.1 in) of precipitation over 10 days, while September sees increased precipitation at 80 mm (3.2 in) across 12 days. Humidity levels are also higher in July at 87%, compared to September's 77%. For more detailed insights, you can check Castro-Urdiales weather in July.
In comparison to August, September experiences slightly cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 29°C (84°F), while August registers a minimum of 15°C (60°F) and a maximum of 32°C (89°F). The average temperature in September is 20°C (67°F), which is just a notch lower than August's average of 21°C (70°F). Precipitation also increases in September, totaling 80 mm (3.2 in) over 12 days, compared to August's 54 mm (2.1 in) across 11 days. Humidity levels are somewhat lower in September at 77%, while August sees higher humidity at 82%. For a closer look at the climate in August, you can check Castro-Urdiales weather in August.
September and October exhibit notable differences in weather patterns. September tends to be warmer, with average temperatures reaching 20°C (67°F) and maximums peaking at 29°C (84°F), while October sees a slight drop in average temperature to 17°C (62°F) and a minimum temperature of 8°C (47°F). Precipitation increases in October, rising to 117 mm (4.6 in) over 13 days, compared to 80 mm (3.2 in) across 12 days in September. Humidity also sees a minor uptick, with October averaging 80%, compared to September's 77%. For more detailed information, you can check Castro-Urdiales weather in October.
September weather is generally warmer and more stable, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 29°C (84°F), and an average of 20°C (67°F). The month experiences 80 mm (3.2 in) of precipitation over about 12 days, accompanied by a humidity level of 77%. Conversely, November ushers in cooler conditions, with temperatures dropping significantly; the minimum is 7°C (45°F) and the maximum reaches only 22°C (72°F), resulting in an average of 13°C (56°F). This month is also wetter, with 189 mm (7.5 in) of rain spread across 18 days and slightly higher humidity at 83%. For more detailed insights on November weather, check Castro-Urdiales weather in November.
The weather in September is significantly warmer than in December, with average temperatures reaching around 20°C (67°F) compared to just 12°C (53°F) in December. While September enjoys minimum temperatures of 13°C (56°F) and maximums of 29°C (84°F), December's temperatures dip lower, with minimums around 6°C (43°F) and maximums peaking at 19°C (66°F). Additionally, September experiences less precipitation, totaling 80 mm (3.2 in) over about 12 days, whereas December sees a considerable increase with 191 mm (7.5 in) spread over 18 days. Humidity also rises slightly from 77% in September to 85% in December, contributing to a more damp and chilly atmosphere during the latter month. For more detailed insights, check out Castro-Urdiales weather in December.
As summer gracefully transitions into autumn, September in Castro-Urdiales offers a delightful shift in weather. With warm days still lingering, the average temperature creates a comfortable atmosphere, but the gradual increase in humidity and precipitation signals the approaching seasonal change. Unlike the drier summer months, September sees more frequent rainfall, with occasional showers gracing the landscape. This combination of warmth and moisture nurtures the lush surroundings, making it a vibrant time to explore the natural beauty of the region. For more detailed insights into the annual climate patterns, visit Castro-Urdiales Climate.