Last updated: February 6, 2025
September in Bilbao, Spain offers a warm transition from summer to autumn, with maximum temperatures reaching up to 30°C (86°F) and an average of 18°C (65°F). As the month progresses, temperatures dip to a comfortable minimum of 10°C (50°F) at night. While the sunshine is pleasant, rainfall is not uncommon, contributing a total of 81 mm (3.2 in) over about 12 days, leading to a humidity level of 77%. This dynamic weather makes September an ideal time to enjoy Bilbao's vibrant culture while experiencing the changing seasons.
In September, Bilbao greets visitors with a delightful transition from summer warmth to the crispness of autumn. The temperatures range from a pleasant 10°C (50°F) at night to an inviting 30°C (86°F) during the day, offering a comfortable average of 18°C (65°F). This month marks a subtle cooldown from the peak summer heat, yet still provides ample sunshine for outdoor exploration. As summer fades, travelers can enjoy the vibrant city without the sweltering temperatures, making September an ideal time for enjoying Bilbao's stunning architecture and rich culture.
September in Bilbao marks a subtle transition as summer wanes and autumn approaches. With 81 mm (3.2 in) of precipitation spread over 12 days, the month maintains a moderate dampness characteristic of the Basque Country. This is a slight uptick from the drier months of July and August, which saw minimal rain, yet remains significantly lower than the impending rainier months of October and November. As the days shorten and temperatures cool, September’s rainfall provides a refreshing prelude to the more intense precipitation that follows, highlighting the region's shift into the wetter season.
As summer transitions into autumn, September brings a noticeable dip in humidity levels in Bilbao, Spain, settling at around 77%. This marks a shift from the peak summer months, where humidity soared to 87% in July. While humidity remains relatively high throughout the year, with winter months hovering between 83% and 85%, September's figures suggest a refreshing change as the city prepares for cooler temperatures. This slight decrease not only enhances comfort for residents and visitors alike but also serves as a sign of the shifting seasons, inviting the vibrant landscape of Bilbao to embrace the autumnal palette.
As summer fades into fall, September in Bilbao shows a notable transition in UV exposure, with a UV Index of 7, categorized as high. This reflects a slight decline from the intense very high levels of August and July, yet individuals should still exercise caution, as the burn time remains at 25 minutes. This month bridges the gap between summer sun and the cooler autumn months, emphasizing the importance of sun protection even as temperatures begin to drop. For more detailed insights on UV trends throughout the year, visit Bilbao UV Index.
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September in Bilbao, Spain, welcomes the warm embrace of golden sunshine, with 332 hours illuminating the city. This month, along with April, marks a turning point as the days start to shorten, yet still enjoy substantial daylight. As summer fades, temperatures remain pleasant, contrasting sharply with the winter months that follow, where sunshine dips significantly to 293 hours in October and further decreases throughout the colder season. The steady decline in sunlight from the summer peak of 400 hours in July emphasizes the vibrancy of September, making it an ideal time to explore the city's rich culture and stunning landscapes before the darker days arrive.
In Bilbao, Spain, September typically signals a gentle transition towards autumn, characterized by a 27% chance of sunny weather. This month witnesses a slight dip in sunshine compared to the peak summer months of July and August, both boasting a 37% chance of clear skies. After a robust spring, where March shines at 40%, and with varying odds in the earlier months, September's sunlit days are fewer yet still offer a pleasant respite before the cooler months set in. As the year progresses, the likelihood of sunny days fluctuates, with October resuming a somewhat brighter 36%, hinting at the resilience of clear weather as summer fades. Thus, while September offers some sunshine, it's merely a prelude to the richer hues of fall.
As September rolls into Bilbao, the city enjoys a delightful 12 hours of daylight, marking a gentle transition towards the shorter days of autumn. This month showcases a gradual decline from the summer highs of 15 hours in June and 14 hours in July, where the sun lights up the streets late into the evening. Following the vibrant days of August, which also basked in 13 hours of daylight, September offers a more tempered light. This month's daylight serves as a reminder of the impending shift, yet it still provides ample opportunity for outdoor activities and picturesque strolls as the vibrant hues of fall begin to emerge. With daylight hours steadily tapering off as October approaches, September stands as a bridge between the warm, sun-soaked days of summer and the crisp, cozy embrace of autumn.
As September arrives in Bilbao, Spain, the breeze shows a subtle revival from the summer lull, with an average wind speed of 2.6 m/s (6 mph). This slight uptick from the preceding months signals a gentle shift in the atmosphere, paving the way for autumn's arrival. Over the warmer months, the city experiences a gradual decline in wind speed, reaching a low of 2.4 m/s (5 mph) in August. However, with the onset of September, the winds begin to whisper of change, hinting at the brisker conditions that follow in October and November, where speeds climb once again. This changing rhythm sets the stage for a lively transition, as the air grows crisper and the scenic landscapes of Bilbao prepare for their breathtaking autumnal hues.
The weather in Bilbao 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 Bilbao and find detailed weather information for every month.
September and January present quite contrasting weather patterns. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F) with an average of 18°C (65°F), making it a warm month with notable summer remnants. This period also experiences relatively high humidity at 77% and moderate precipitation, with 12 rainy days totaling 81 mm (3.2 in). In stark contrast, January's climate is notably cooler, with temperatures dipping as low as -1°C (30°F) and averaging around 8°C (46°F). While the maximum reaches 19°C (66°F), this month tends to be wetter, with 117 mm (4.6 in) of precipitation spread over 13 days and a higher humidity level at 85%. For further details on January weather, you can check Bilbao weather in January.
September and February offer contrasting weather experiences. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), creating a warm and pleasant atmosphere with an average temperature of 18°C (65°F). However, the month brings about significant humidity at 77% and 81 mm (3.2 in) of rainfall over approximately 12 days. In contrast, February features much cooler temperatures, with a minimum of -2°C (30°F) and maximum of 22°C (72°F); the average temperature drops to 10°C (50°F). Despite being chillier, February sees slightly higher precipitation, at 103 mm (4.0 in) spread over 13 days, accompanied by a humidity level of 83%. For more details on February weather, you can visit Bilbao weather in February.
When comparing the weather in September and March, notable differences emerge. September boasts milder temperatures, with a minimum of 10°C (50°F) and an average of 18°C (65°F), reaching highs of up to 30°C (86°F). In contrast, March experiences cooler conditions, with temperatures dipping as low as -1°C (30°F) and averaging around 10°C (51°F). Precipitation levels are also higher in March, totaling 98 mm (3.9 in) over 17 days, compared to September's 81 mm (3.2 in) over 12 days. Both months exhibit high humidity, with March slightly higher at 82% versus September's 77%. For more detailed information, you can check the Bilbao weather in March.
September and April present notably different weather patterns. In September, the temperatures typically range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), creating a warm average of 18°C (65°F). This month sees about 81 mm (3.2 in) of precipitation over approximately 12 days, with a humidity level of 77%. In contrast, April experiences cooler temperatures, with a minimum of 1°C (34°F), an average of 12°C (54°F), and a maximum of 23°C (74°F). It also has slightly higher rainfall, totaling 92 mm (3.6 in) over around 15 days, accompanied by a humidity of 81%. For more detailed information, check Bilbao weather in April.
In comparing the weather of September and May, September generally experiences warmer temperatures, with a minimum of 10°C (50°F) and an average of 18°C (65°F), compared to May's minimum of 5°C (41°F) and average of 14°C (58°F). While both months have similar levels of precipitation at around 81-82 mm (3.2 in), May sees rain on more days, averaging 15 days compared to September's 12 days. Humidity levels are also quite comparable, with September at 77% and May slightly higher at 81%. For more specific details on the weather trends, you can check Bilbao weather in May.
When comparing the weather in September and June, we see some notable differences. September tends to have slightly higher average temperatures, with a minimum of 10°C (50°F) and a maximum of 30°C (86°F), while June starts off just a notch cooler with a minimum of 9°C (48°F) and can reach up to 32°C (89°F). Precipitation levels are also distinct; September experiences 81 mm (3.2 in) of rain over 12 days, whereas June sees more rain, totaling 103 mm (4.1 in) over 14 days. Additionally, humidity levels are relatively high in both months, with September registering 77% and June slightly higher at 83%. For more detailed information, you can check the Bilbao weather in June.
In comparing the weather of September and July, September typically experiences a slightly wider temperature range, with minimum temperatures averaging around 10°C (50°F) and maximums reaching up to 30°C (86°F). In contrast, July has a slightly higher average temperature, ranging from a minimum of 11°C (53°F) to a maximum of 33°C (91°F). Precipitation levels in September are notably higher at 81 mm (3.2 in) over 12 days, compared to July's 65 mm (2.6 in) over the same number of days. Humidity also tends to be lower in September at 77%, while July peaks at 87%. To explore more about weather specifics in July, visit Bilbao weather in July.
In comparing the weather between August and September, we see a notable shift as summer transitions into autumn. August typically boasts warmer temperatures, with a minimum of 12°C (54°F), an average of 20°C (67°F), and a maximum reaching 33°C (93°F). In contrast, September experiences cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 30°C (86°F), reflecting the gradual drop in warmth as summer gives way to fall.
Precipitation is slightly higher in September, totaling 81 mm (3.2 in) over 12 days, compared to 62 mm (2.5 in) also over 12 days in August. Additionally, while humidity levels remain comparable, September sees a humidity level of 77%, slightly lower than August's 82%. For more detailed information about August weather, you can check this link: Bilbao weather in August.
September weather is characterized by warmer temperatures, with averages around 18°C (65°F) and maximums reaching 30°C (86°F). In contrast, October sees a notable drop in temperatures, averaging 15°C (59°F) and peaking at 27°C (81°F). While September experiences around 81 mm (3.2 in) of precipitation over 12 days, October is slightly wetter, with 105 mm (4.1 in) of rain spread across 13 days. Additionally, humidity remains fairly high in both months, increasing slightly from September's 77% to October's 80%. For more detailed information, you can visit Bilbao weather in October.
September and November exhibit notable contrasts in weather. September experiences milder temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 18°C (65°F). In contrast, November's temperatures are considerably cooler, with a minimum of 4°C (39°F), an average of 11°C (53°F), and a maximum of 22°C (72°F). Additionally, November sees significantly higher precipitation, totaling 158 mm (6.2 in) across 18 days of rain, compared to September's 81 mm (3.2 in) over 12 days. Humidity levels also increase slightly, with November sitting at 83% compared to September's 77%. For more details, check out Bilbao weather in November.
In September, the weather is quite warm with average temperatures around 18°C (65°F) and maximums reaching up to 30°C (86°F), making it a pleasant time to enjoy outdoor activities. However, the month does see a fair amount of rainfall, totaling 81 mm (3.2 in) across about 12 days, with humidity levels at 77%.
In contrast, December brings a notable drop in temperatures, averaging around 10°C (50°F) with maximums of only 19°C (66°F). Precipitation increases significantly to 154 mm (6.1 in) over 17 days, and humidity rises to 85%, contributing to a much cooler and wetter atmosphere. For those interested in specific weather details, you can find more at Bilbao weather in December.
As summer gently transitions into autumn, September in Bilbao offers a unique blend of warmth and occasional rainfall, making it distinctly different from the hotter, drier summer months. With average temperatures hovering around 18°C (65°F) and a peak of 30°C (86°F), you'll enjoy pleasant days ideal for exploring the city. However, the 77% humidity and about 81 mm (3.2 in) of precipitation over 12 days remind you that the changing seasons bring unpredictable weather. This month strikes a balance between lingering summer heat and the cool embrace of fall, perfect for experiencing Bilbao's vibrant culture and scenery. For more insights into how September compares to the rest of the year, check out the details at Bilbao Climate.