Last updated: February 6, 2025
September in Santiago de Compostela, Spain offers a mild yet varied climate, where temperatures can peak at a maximum of 32°C (90°F), while settling into a comfortable average of 17°C (63°F), with cooler evenings dipping to a minimum of 7°C (45°F). The month witnesses approximately 55 mm (2.2 in) of rainfall across 10 days, contributing to the region’s lush greenery. With a humidity level hovering around 79%, visitors can expect a refreshing, albeit slightly damp, atmosphere, perfect for exploring the city's rich history and picturesque landscapes.
In September, Santiago de Compostela begins to soften the summer's heat, offering a delightful transition into autumn. With temperatures ranging from a minimum of 7°C (45°F) to a comfortable maximum of 32°C (90°F), the month's average temperature floats around 17°C (63°F), providing pleasant days for exploring this historic city. As the sweltering highs of August wane, visitors can expect a more temperate climate, ideal for leisurely strolls along the cobblestone streets and enjoying the vibrant local culture. This gradual shift heralds the arrival of golden autumn days, making September one of the most enchanting months to experience Santiago de Compostela.
In September, Santiago de Compostela experiences a noticeable shift in precipitation, with an average rainfall of 55 mm (2.2 in) spread across approximately 10 days. This marks a return to wetter conditions as the city transitions from the drier summer months of July and August, which saw significantly lower totals of 32 mm and 36 mm, respectively. The precipitation in September is a prelude to the more intense rainfall that characterizes the autumn months, with October and November typically bringing much heavier precipitation of 105 mm (4.1 in) and 150 mm (5.9 in). This gradual increase hints at the approaching winter, underscoring Santiago's reputation for a changeable climate, where the serene summer sun gives way to the lush greenery nourished by autumn rains.
As the summer fades into autumn, September in Santiago de Compostela brings a slight dip in humidity, settling at 79%. This marks an interesting transition from the warmer months, where humidity peaked at 82% in July and dropped further to 78% in August. September's relatively lower humidity levels suggest a subtle shift towards the crispness of fall, setting the stage for higher moisture levels that return in October with 82%. This trend highlights Santiago's characteristic climate, where humidity remains consistently high throughout the year, particularly in the winter months, reaching a notable 85% by December. Overall, as September unfolds, residents and visitors alike can experience a freshening atmosphere that signals the change of seasons.
In September, Santiago de Compostela experiences a UV Index of 7, categorized as high, indicating that sun exposure is becoming more intense as summer transitions to autumn. This reflects a slight decline from the peak summer months, where the index hovered between 9 and 10, yet it still warrants caution, especially with a burn time of just 25 minutes. As the days gradually shorten, the risk of UV exposure remains significant, urging residents and visitors to stay vigilant with sun protection. Looking ahead, the UV Index will further decrease into fall, yet with September's readings, it’s clear that outdoor enthusiasts should continue to prioritize safety in the sun. For more details, check out Santiago de Compostela UV Index.
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As summer gracefully transitions into autumn, September in Santiago de Compostela radiates with an impressive 339 hours of sunshine. This month reflects a notable decline from the sun-drenched peak of July, which boasts 414 hours, yet still outshines the earlier months. March and April emerge as harbingers of brighter days, with 303 and 342 hours respectively, setting the stage for the sunny crescendo of summer. As September rolls in, it offers a gentle balance—not only is it significantly sunnier than the darker, drizzly winter months, but it also retains the warmth of summer, making it a perfect time to explore the enchanting streets and lush landscapes of this historic city. The gradual decrease in sunlight leading into October suggests a cozy wrap-up of the vibrant summer, inviting visitors to savor the lingering warmth before embracing the crispness of fall.
In Santiago de Compostela, September offers a 32% chance of sunny weather, reflecting a notable decrease from the warmer summer months of July and August, which enjoyed higher probabilities at 41% and 48%, respectively. As autumn approaches, the likelihood of sunshine shows a tendency to dip, aligning with trends seen in earlier spring months like April and May. However, as compared to the wetter winter months, September still stands out as a relatively pleasant time to explore the city, making it a balanced choice for both sun seekers and those who embrace the charm of a softer, changing season.
As summer gradually hands the baton to autumn in Santiago de Compostela, September offers a balanced mix of daylight, with 12 hours illuminating the days. This marks a gentle decline from the 14 hours enjoyed in May and June, signaling a transitional phase as the vibrant days of summer wane. The daylight duration dips further as the year progresses, particularly notable in October, which sees a further reduction to 10 hours. This trend highlights the city's shift from the sun-kissed festivities of summer to the cozy embrace of fall, inviting residents and visitors alike to savor the rich, cultural tapestry that accompanies this seasonal change.
As September arrives in Santiago de Compostela, the city experiences its calmest winds of the year, with an average speed of just 2.9 m/s (7 mph). This gentle breeze marks a notable decline from the more robust gusts of summer, particularly from the preceding months when winds hovered around 3.1 m/s in August and 3.3 m/s in July. The trend showcases a gradual shift as the warmth of summer gives way to the crisper air of autumn. After September, wind speeds begin to pick up once again in October, suggesting a transition towards a more dynamic season. This rhythmic ebb and flow of wind not only shapes the atmosphere but also enhances the charm of Santiago's historic streets as they enter the fall.
The weather in Santiago de Compostela 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 Santiago de Compostela and find detailed weather information for every month.
In September, Santiago de Compostela experiences a wide temperature range, with minimums around 7°C (45°F) and maximums reaching up to 32°C (90°F). The average temperature hovers around 17°C (63°F), and while there is some precipitation, totaling 55 mm (2.2 in) over about 10 days, the overall humidity stands at 79%. In contrast, January brings much cooler weather, with minimum temperatures dropping to -3°C (28°F) and maximums capping at 20°C (68°F). The average temperature in January is about 8°C (47°F), accompanied by increased precipitation of 97 mm (3.8 in) over 11 days and slightly higher humidity at 84%. These variations reflect the transition from early autumn warmth in September to the chilly depths of winter in January. For more details about January weather in this region, check out Santiago de Compostela weather in January.
In September, the weather is generally warm, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 32°C (90°F), averaging around 17°C (63°F). Precipitation is relatively low at 55 mm (2.2 in), occurring over about 10 days, while humidity sits at 79%. In contrast, February brings a colder climate, with temperatures ranging from a chilly minimum of -1°C (31°F) to a milder maximum of 22°C (71°F) and an average of 10°C (50°F). This month sees significantly more rainfall, totaling 124 mm (4.9 in) over approximately 13 days, and slightly higher humidity at 83%. For more details, check out Santiago de Compostela weather in February.
In comparing the weather of September and March, one can see distinct differences in temperature and precipitation. September features a broader temperature range with a minimum of 7°C (45°F) and a maximum of 32°C (90°F), averaging at 17°C (63°F). In contrast, March starts off cooler, with minimum temperatures dropping to -1°C (30°F) and a maximum of 24°C (75°F), resulting in an average of 10°C (50°F). Additionally, March experiences significantly more precipitation, totaling 136 mm (5.4 in) over 14 days, compared to September's 55 mm (2.2 in) over 10 days. Humidity levels are relatively similar, with September at 79% and March slightly higher at 82%. For more detailed information on March weather, you can check this link: Santiago de Compostela weather in March.
When comparing the weather in September and April, we see notable differences in temperature and precipitation. September boasts a wider temperature range, with a minimum of 7°C (45°F) and maximum reaching up to 32°C (90°F), leading to a comfortable average of 17°C (63°F). In contrast, April experiences cooler temperatures, starting at a minimum of 1°C (34°F), peaking at 26°C (79°F), and averaging just 12°C (53°F). Additionally, April is significantly wetter, receiving 112 mm (4.4 in) of precipitation over 14 days, compared to September's 55 mm (2.2 in) over 10 days. Humidity levels are also slightly higher in April at 83%, compared to September's 79%. For more detailed information, you can check Santiago de Compostela weather in April.
In comparing the weather between September and May, it becomes evident that September tends to be warmer overall. The average temperature in September reaches 17°C (63°F), with maximum highs of up to 32°C (90°F), while May averages at a cooler 14°C (58°F) and peaks at 30°C (86°F). Both months experience a similar amount of precipitation, with September seeing 55 mm (2.2 in) over approximately 10 days, and May having 80 mm (3.2 in) spread over 11 days. Additionally, September has slightly lower humidity at 79% compared to May's 83%. For a more detailed look at weather patterns during this month, check out Santiago de Compostela weather in May.
When comparing the weather in September and June, we see some notable differences. September generally offers warmer maximum temperatures, peaking at 32°C (90°F) compared to June's maximum of 31°C (88°F). While both months have similar average temperatures, September's cooler minimum temperature of 7°C (45°F) contrasts slightly with June's 5°C (42°F). Precipitation is higher in June, with 73 mm (2.9 in) over 12 days, compared to September's 55 mm (2.2 in) over 10 days. Humidity levels are also slightly elevated in June at 83%, compared to September's 79%. For a more detailed look into June weather, you can visit Santiago de Compostela weather in June.
When comparing the weather in September and July, both months exhibit similar maximum temperatures, peaking at around 32°C (90°F in September and 89°F in July). However, September tends to be slightly cooler with an average temperature of 17°C (63°F), while July offers a warmer average of 18°C (65°F). Additionally, September experiences more precipitation, totaling 55 mm (2.2 in) over about 10 days compared to July's 32 mm (1.3 in) over just 6 days. Humidity levels are relatively close, with September at 79% and July slightly higher at 82%. For a more detailed insight into July's weather, you can check Santiago de Compostela weather in July.
When comparing the weather in August and September, we can observe a notable shift in temperatures and precipitation patterns. August tends to be slightly warmer, with minimum temperatures around 10°C (50°F) and an average of 18°C (65°F), reaching a maximum of 33°C (91°F). In contrast, September experiences cooler mornings with a minimum of 7°C (45°F) and an average temperature of 17°C (63°F), although it still peaks at a maximum of 32°C (90°F). Rainfall also increases in September, with 55 mm (2.2 in) over 10 days, compared to August's 36 mm (1.4 in) over only 7 days. Humidity levels are relatively similar, hovering around 79% in September and 78% in August. For more detailed information on August weather, you can check Santiago de Compostela weather in August.
In comparing the weather of September and October, we notice a distinct shift in temperature and precipitation patterns. September boasts a broader temperature range with a minimum of 7°C (45°F) and a maximum of 32°C (90°F), while October cools down, showing a minimum of 4°C (39°F) and a maximum of 30°C (86°F). Precipitation also increases in October, with totals reaching 105 mm (4.1 in) over 12 days compared to September's 55 mm (2.2 in) spread across 10 days. Additionally, humidity rises slightly from 79% in September to 82% in October, contributing to a more damp atmosphere. For a closer look at the specifics, check out Santiago de Compostela weather in October.
September and November exhibit distinctly contrasting weather patterns. In September, temperatures range from a mild minimum of 7°C (45°F) to a warm maximum of 32°C (90°F), with an average of 17°C (63°F). The month sees about 55 mm (2.2 in) of precipitation over approximately 10 days, accompanied by a humidity level of 79%. In contrast, November brings cooler conditions with temperatures hitting a minimum of 1°C (33°F) and an average of 11°C (52°F), peaking at just 20°C (68°F). Precipitation significantly increases to 150 mm (5.9 in) over 16 days, with humidity rising to 84%. These changes illustrate the transition from the warm late summer to the chilly, wetter days of late autumn. For a closer look at the weather specifics, you can check Santiago de Compostela weather in November.
September and December present a striking contrast in weather patterns. September enjoys warmer temperatures, with daytime highs reaching up to 32°C (90°F) and an average of 17°C (63°F), while December sees significantly cooler temperatures, with maximums around 17°C (63°F) and an average of 10°C (50°F). Precipitation also varies considerably, as September typically receives 55 mm (2.2 in) over about 10 days, while December experiences much wetter conditions, accumulating 169 mm (6.7 in) over 17 days. Additionally, humidity levels are slightly higher in December at 85%, compared to 79% in September. For more detailed information, you can check out Santiago de Compostela weather in December.
In September, Santiago de Compostela transitions from the warmth of summer to the cooler embrace of autumn, offering a delightful mix of pleasant temperatures and occasional rain. With an average temperature hovering around 17°C, it’s a comfortable time to explore the city's rich history. While the month enjoys some sunny days, expect a bit more rain compared to the drier peak summer months, with about 10 days experiencing precipitation. The humidity remains noticeable at 79%, making it feel a bit muggy at times. Overall, September strikes a balance between balmy days and refreshing breezes, marking a beautiful shift in the local climate. For more insights into the seasonal changes, check out Santiago de Compostela Climate.