Last updated: February 6, 2025
In September, Castelldefels, Spain experiences pleasantly warm weather, with maximum temperatures reaching up to 28°C (83°F) and a comfortable average of 22°C (73°F). As summer transitions into autumn, the days remain inviting, though the minimum temperature can drop to 15°C (59°F) at night. Rainfall is moderate, with total precipitation measuring 99 mm (3.9 in) over 13 days, resulting in a humidity level of around 68% that adds a refreshing feel to the air. This blend of warmth and occasional rain creates an ideal environment for outdoor activities and exploring the stunning coastal scenery.
As September rolls in, Castelldefels, Spain enjoys a delightful transition from the sweltering summer days of August to the milder temperatures of autumn. With minimums settling at 15°C (59°F) and averages hovering around 22°C (73°F), this month offers a cozy warmth perfect for outdoor activities. The maximum temperature reaches a comfortable 28°C (83°F), ensuring plenty of sunshine without the oppressive heat, making it an ideal time for beach outings and exploration. This gradual cooling trend signals the onset of fall, while still holding onto the vibrant essence of summer, providing visitors and locals alike with a fantastic climate to savor the coastal beauty.
September marks a notable transition in Castelldefels, Spain, where precipitation levels soar to an impressive 99 mm (3.9 in), making it one of the wettest months of the year. This surge in rainfall, spanning 13 days, signals the end of summer and the onset of autumn, bringing with it cooler temperatures and lush landscapes. Compared to the drier months of July (28 mm) and August (38 mm), September's volume underscores a distinct seasonal shift. Following this peak, October continues the trend with 109 mm (4.3 in), although with fewer rainy days at 11. This pattern indicates not just a transition in weather but also the critical role September plays in replenishing the region’s water resources as it moves toward more sustained autumnal rains.
In September, Castelldefels, Spain, experiences a slight uptick in humidity, averaging 68%. This marks a subtle rebound from the summer months, where levels hovered around 64% in July and August. As the sweltering heat of summer gives way to the more temperate days of early autumn, humidity begins to rise again, reflecting a transitional period as the region braces for the wetter months ahead. This gradual increase leads into October, where humidity peaks at 77%, hinting at the impending seasonal shifts. Overall, September serves as a bridge, blending the warmth of summer with the cooler, more humid days to come.
As summer gives way to autumn in Castelldefels, Spain, the UV Index experiences a notable transition. In September, the UV Index drops to 7, categorized as high, allowing for 25 minutes of unprotected sun exposure before risking a burn. This marks a shift from the peak summer months of June and July, where the index reached 10, demanding greater caution under the sun. Overall, September's UV Index reflects an easing of the sweltering summer rays, yet it remains essential to stay protected. For more detailed information on UV levels throughout the year, visit Castelldefels UV Index.
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As summer gently fades into autumn, September in Castelldefels, Spain, continues to bask in a generous 338 hours of sunshine, maintaining a warm glow that reflects the lingering warmth of the season. The sun's presence is notably strong, though a slight decline from the peak 425 hours witnessed in July signals a transition toward the cooler months ahead. This month stands as a bridge, offering a radiant blend of light and comfort, with daylight hours gradually tapering off from the vibrant summer. With sunshine hours still significantly higher than the winter months, September invites both locals and visitors to revel in the idyllic Mediterranean climate before cooler days arrive.
While Castelldefels, Spain, typically basks in sunshine during the summer months, September marks a noticeable dip in the chances of sunny weather, with only 35% likelihood. This decline follows the peak of 72% in July, reflecting a transitional period as summer yields to autumn. Interestingly, as the season changes, the sun's presence remains more vibrant than in the earlier months of the year, such as February with just 38% and April at 38%. Thus, while September may not offer the sun-drenched days of July or August, it still provides a more temperate climate compared to the winter months ahead, hinting at the beauty of early autumn along the Catalonian coast.
As summer fades into autumn, September in Castelldefels, Spain, brings a gradual shift in daylight. With 12 hours of sunlight, this month marks a gentle decline from the peak of 15 hours experienced in June. Following the vibrant summer days, the daylight dips slightly but still offers ample opportunity for outdoor activities and enjoying the lingering warmth of the season. The trend of longer days from January through June starts to reverse, setting the stage for the cozy, shorter days of fall. As September progresses, residents and visitors alike can relish the unique charm of the Mediterranean coastline under a slightly softer sun.
As September rolls into Castelldefels, Spain, the average wind speed gently rises to 3.7 m/s (8 mph), offering a refreshing shift from the warmer summer months. This slight increase signals a transition; the summer breezes, which lingered at around 3.2 m/s (7 mph) in August, give way to a more invigorating atmosphere. The winds remain generally mild, similar to the preceding months, hinting at the approach of autumn. As the year progresses, October follows closely with a slight dip to 3.4 m/s (8 mph), showcasing a consistent pattern where the wind speeds tend to peak in the fall and early winter. This seasonal rhythm enhances the unique charm of Castelldefels, making September a perfect time for outdoor activities, where the gentle winds invite both relaxation and adventure.
The weather in Castelldefels 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 Castelldefels and find detailed weather information for every month.
September and January present contrasting weather experiences. In September, temperatures range from a mild 15°C (59°F) at night to a warm 28°C (83°F) during the day, with an average of 22°C (73°F). This month also sees considerable rainfall, totaling 99 mm (3.9 in) across 13 days, while humidity hovers around 68%. In stark contrast, January features cooler weather, with nighttime lows dropping to 3°C (38°F) and daytime highs reaching 20°C (68°F), averaging 10°C (50°F). Precipitation is lighter during this month, totaling 59 mm (2.3 in) over just 6 days, accompanied by a higher humidity level of 79%. For more details on January weather, visit this link: Castelldefels weather in January.
In September, the weather is noticeably warmer, with temperatures ranging from a minimum of 15°C (59°F) to a pleasant average of 22°C (73°F), peaking at 28°C (83°F). This month also experiences relatively high humidity at 68% and receives around 99 mm (3.9 in) of precipitation over 13 days. In contrast, February presents a much cooler climate, with temperatures dropping down to a minimum of 2°C (37°F) and averaging just 11°C (53°F), reaching a maximum of 19°C (66°F). The precipitation is significantly lower at 47 mm (1.9 in) spread over only 6 days, while humidity increases slightly to 74%. For more detailed insights, check out Castelldefels weather in February.
When comparing the weather in September and March, there's a notable difference in temperature and precipitation levels. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 28°C (83°F), with an average of 22°C (73°F). This month also experiences higher precipitation, with 99 mm (3.9 in) over 13 days, while the humidity sits at 68%. In contrast, March is significantly cooler, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 19°C (67°F), averaging just 12°C (54°F). Additionally, March sees much less rainfall, totaling 47 mm (1.9 in) over only 6 days and slightly higher humidity at 71%. For a detailed overview of the weather conditions in March, check out Castelldefels weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 28°C (83°F), with an average of 22°C (73°F). The month also experiences relatively high humidity at 68% and considerable rainfall, totaling 99 mm (3.9 in) over about 13 days. In contrast, April sees cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 20°C (69°F), resulting in an average of 14°C (57°F). Precipitation is lower in April, at 69 mm (2.7 in) over roughly 9 days, and humidity is slightly higher at 69%. For more details about the weather conditions in April, visit Castelldefels weather in April.
When comparing the weather in September to that of May, several notable differences emerge. September typically experiences warmer temperatures, with a minimum of 15°C (59°F) and an average high of 28°C (83°F), while May starts cooler, with a minimum of 9°C (48°F) and an average high of 25°C (78°F). Additionally, September sees more precipitation, averaging 99 mm (3.9 in) over 13 days, compared to May's 39 mm (1.5 in) across just 7 days. Despite the slightly higher humidity in September at 68%, it remains relatively comfortable, as May's humidity is marginally lower at 66%. For a more in-depth look at May weather, you can visit Castelldefels weather in May.
In comparing the weather between September and June, both months feature similar maximum temperatures, with highs reaching 28°C (83°F). However, September tends to be slightly warmer overall, averaging 22°C (73°F) compared to June’s average of 21°C (71°F). Precipitation is significantly higher in September, with 99 mm (3.9 in) over 13 days, while June only sees 31 mm (1.2 in) across 5 days, indicating a much drier month. Additionally, humidity levels are slightly elevated in September at 68%, compared to 65% in June. For more details, you can check Castelldefels weather in June.
When comparing September and July weather, September tends to be slightly cooler, with a minimum temperature of 15°C (59°F) and an average of 22°C (73°F), while July is warmer, with a minimum of 18°C (64°F) and an average of 24°C (76°F). Additionally, September experiences more rainfall, totaling 99 mm (3.9 in) over 13 days, in contrast to July's much drier conditions with only 28 mm (1.1 in) over 5 days. Humidity levels are also higher in September at 68%, compared to July's 64%. For a more detailed look at July weather in this area, check out Castelldefels weather in July.
In comparison to August, September experiences slightly cooler temperatures, with a minimum of 15°C (59°F) and an average of 22°C (73°F), compared to August's minimum of 18°C (65°F) and average of 25°C (77°F). The maximum temperatures also drop in September, reaching 28°C (83°F) versus August's peak of 32°C (90°F). Additionally, September sees a significant increase in precipitation, with 99 mm (3.9 in) over 13 days, whereas August records only 38 mm (1.5 in) over 7 days. The humidity level also rises slightly in September to 68%, compared to 64% in August. For more detailed information about August weather, you can check Castelldefels weather in August.
September and October present notable differences in weather patterns. September typically enjoys warmer temperatures, with an average of 22°C (73°F) and maximums reaching 28°C (83°F), while October cools down to an average of 19°C (66°F) and peaks at 25°C (77°F). Precipitation slightly increases in October, totaling 109 mm (4.3 in) over 11 days, compared to September's 99 mm (3.9 in) over 13 days. Additionally, October experiences higher humidity at 77%, compared to September's 68%. For a detailed look at the weather specifics, you can visit Castelldefels weather in October.
September offers a more temperate climate with an average temperature of 22°C (73°F) and maximum highs reaching 28°C (83°F), making it ideal for outdoor activities. The month sees about 99 mm (3.9 inches) of precipitation over 13 days, which contributes to the higher humidity level of 68%. In contrast, November experiences cooler temperatures, with an average of 14°C (58°F) and maximums of 22°C (72°F), reflecting a significant drop in warmth. While November has less precipitation at 81 mm (3.2 inches) over just 9 days, it boasts a higher humidity level of 79%. For more detailed insights on November weather, you can visit Castelldefels weather in November.
In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 28°C (83°F), with an average of 22°C (73°F). This month experiences around 99 mm (3.9 in) of precipitation over approximately 13 days, along with a humidity level of 68%. In contrast, December brings a significant drop in temperatures, with a minimum of 4°C (40°F) and a maximum of 18°C (65°F), averaging 12°C (53°F). The month is much drier, recording only 30 mm (1.2 in) of precipitation over about 4 days, though humidity rises to 79%. For more insights, you can check Castelldefels weather in December.
As summer transitions into autumn, September in Castelldefels offers a delightful blend of warmth and refreshing breezes. The maximum temperatures remain pleasantly warm, creating an inviting atmosphere for beach-goers, yet the air feels cooler compared to the peak summer months. While occasional rain can be expected, bringing much-needed moisture to the region, the humidity settles at a comfortable level, offering a reprieve from the sweltering heat of August. This transition period not only enhances the beauty of the coastline but also showcases the charm of this vibrant city. For a deeper dive into the local climate trends, check out Castelldefels Climate.