September Weather in Zarautz, Spain

Last updated: February 6, 2025

September in Zarautz, Spain delights visitors with a pleasant blend of summer warmth and autumnal freshness. With maximum temperatures reaching 30°C (87°F) and an average of 18°C (65°F), the weather invites outdoor exploration, despite the cooler lows of 9°C (49°F). However, the month also brings 98 mm (3.9 in) of rainfall over 13 days, resulting in a humidity level of 75% that adds a refreshing touch to the seaside atmosphere. Whether basking in the sun or enjoying the occasional rain shower, Zarautz beautifully transitions from summer's intensity to the gentle embrace of early autumn.

September Temperature in Zarautz

In Zarautz, Spain, September marks a delightful transition into early autumn, characterized by mild temperatures that invite both locals and visitors outdoors. The month sees a minimum of 9°C (49°F) and a comfortable average of 18°C (65°F), blending warmth with the crispness of the changing season. With daytime highs reaching a pleasant 30°C (87°F), beachgoers can still indulge in the sun before the cooler months set in. Comparing this to the preceding summer, where temperatures soared to 33°C (91°F) in July and August, September offers a refreshing yet warm respite. This time of year perfectly captures the essence of Zarautz, making it a great month for enjoying the beautiful coastal scenery while avoiding the peak summer crowds.

September Weather in Zarautz: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Zarautz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec465051545863676865595249
Data source: Temperature data for Zarautz generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Zarautz

In Zarautz, Spain, September experiences a moderate precipitation amount of 98 mm (3.9 in), marking a slight increase from the drier summer months of July and August. With rainfall over 13 days, the onset of autumn begins to bring more moisture to the area, although it still remains lower than the heavier downpours seen in the following months of October and November. This transitional period indicates a shift from the warm, dry summer, preparing the landscape for the upcoming wetter season. Overall, September serves as a gentle reminder of nature’s cyclical patterns, where the combination of moderate rain and lingering warmth creates a rich habitat in Zarautz.

September Precipitation Trends in Zarautz

The chart displays monthly precipitation patterns in Zarautz, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec145129116107115131917999133190211
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Zarautz

In Zarautz, Spain, September marks a transition toward lower humidity levels, with the average dipping to 75%—the lowest rate since May. This decline continues the trend observed through the summer months, where humidity decreased from a high of 86% in January to a more comfortable 76% in August. The trend suggests a gradual easing of the coastal moisture as autumn approaches, paving the way for more pleasant conditions. Interestingly, humidity levels begin to rise again in October, hinting at the return of the characteristic dampness typical of the region later in the year.

September Average Humidity in Zarautz

This chart illustrates the average monthly humidity levels in Zarautz, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%83%81%80%81%80%76%75%81%85%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Zarautz

As summer fades into autumn, September in Zarautz, Spain, sees a slight decline in the UV Index, dropping to a high level of 7. This marks a transition from the intense days of July and August, where a scorching UV Index of 10 was common, necessitating only 15 minutes of exposure before sunburn risk heightened. In contrast, September's burn time extends back to 25 minutes, offering a more forgiving sun for outdoor activities. With the UV Index remaining above average, it's crucial for residents and visitors alike to stay vigilant and protect their skin. As fall approaches, the UV Index will continue to decrease, but for now, enjoy the last rays of summer safely. For more detailed information, visit Zarautz UV Index.

Maximum UV Index Levels in Zarautz for September

The chart shows the monthly maximum UV Index (UVI) for Zarautz in September, 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.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Zarautz September 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.

September Sunshine in Zarautz

As summer gently fades into autumn, September in Zarautz, Spain, remains awash with sunshine, boasting 332 hours of glorious daylight. This month, while slightly less radiant than the peak of July, still showcases a captivating brightness that rivals late spring. The trend reveals a gradual decline in sunlight as the year progresses, with hours peaking in July and tapering off through October. However, September's warmth retains enough vibrancy to invite locals and visitors alike to savor the lingering summer spirit, making it an ideal time to explore the beautiful beaches or enjoy picturesque sunsets over the Basque coastline.

Monthly Sunshine Duration in Zarautz: September Highlighted

The September sunshine duration represents the total number of hours Zarautz experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec169h239h307h332h369h378h401h384h332h292h230h218h
Data source: Zarautz September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Zarautz During September

In Zarautz, Spain, the likelihood of sunny weather in September reflects a notable trend as the summer fades into autumn. With a 28% chance of sunshine, September offers a gentler transition compared to the vibrant sun-filled days of July and August, which range from 36% to 38%. Interestingly, this slight decline in sunny days is consistent with the gradual seasonal shifts, as both May and June show similar percentages (around 30% and 29% respectively). As October approaches with a 39% chance of sun, September remains a lovely, albeit less predictable, month for enjoying that warm coastal allure before the more variable weather sets in. Overall, September continues to provide a pleasant, if slightly subdued, sun-catching experience in this picturesque seaside town.

Percentage of Sunny Days in September in Zarautz

The chart illustrates the percentage of sunny days in Zarautz throughout the year, with September 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 Zarautz experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec21%21%43%38%30%29%36%38%28%39%17%34%
Data source: Zarautz September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Zarautz in September

As summer fades, September in Zarautz, Spain, marks a transition in daylight hours, boasting a generous 12 hours of light. This gradual decline follows the peak of 15 hours in June, exhibiting the region's lush summer vitality. While the daylight diminishes from the sun-drenched height of July and August, it still provides ample sunshine for outdoor activities, with September's warmth holding onto the season's charm. The month reflects a smooth descent towards autumn, contrasting sharply with the shorter days of October, which offer just 10 hours of daylight. This rhythm of daylight highlights the beautiful cyclical nature of Zarautz’s annual climate, inviting locals and visitors alike to savor the last vestiges of summer before transitioning into the cozy embrace of fall.

Average Daylight Hours in Zarautz for September

The chart illustrates the variation in daylight duration in Zarautz throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 23m10h 31m11h 57m13h 25m14h 40m15h 18m14h 58m13h 51m12h 27m10h 59m9h 41m9h 1m
Data source: Zarautz daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Zarautz

As summer transitions into autumn, September in Zarautz, Spain, offers a subtle shift in wind conditions, with an average wind speed of 2.7 m/s (6 mph)—a slight uptick from the preceding months but still quite gentle overall. This period marks the end of the warmest months, where winds have been consistently low, peaking at 2.5 m/s (6 mph) in August. Interestingly, the steady decrease in winds from January's brisk 4.1 m/s (9 mph) to September's calmer breezes suggests a seasonal rhythm, where each month yields a softer touch of the wind. As autumn approaches, Zarautz begins to feel the prelude of stronger gusts anticipated in October and November, while September remains a tranquil time perfect for enjoying the serene coastal beauty.

Average September Wind Speed in Zarautz

The chart displays monthly wind speed patterns in Zarautz, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.14.73.73.43.02.92.72.52.7 m/s3.13.84.8
Data source: Zarautz September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Zarautz Compares to Other Months

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

September and January exhibit stark contrasts in weather patterns. September enjoys mild temperatures ranging from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average temperature of 18°C (65°F). In contrast, January's temperatures are considerably cooler, with a minimum of -1°C (31°F), an average of 8°C (46°F), and a maximum of 19°C (66°F). While September experiences 98 mm (3.9 in) of precipitation over 13 days, January sees a higher precipitation level of 144 mm (5.7 in) across 15 days. Additionally, January's humidity reaches 86%, slightly above September's 75%. For more specific insights on January weather, visit Zarautz weather in January.

When comparing the weather in September and February, notable differences emerge. September typically enjoys milder conditions with average temperatures ranging from a cool 9°C (49°F) to a warm 30°C (87°F), making it a pleasant month for outdoor activities. In contrast, February is much colder, with temperatures starting at a minimum of -2°C (28°F) and only reaching an average high of 22°C (72°F). Additionally, February experiences higher humidity at 85% and greater precipitation, totaling 129 mm (5.1 in), compared to September's 98 mm (3.9 in) over 13 days. For more insights into February weather specifically, you can check out Zarautz weather in February.

September and March present distinct contrasts in weather patterns. September enjoys warmer temperatures, with averages around 18°C (65°F) and maximums reaching up to 30°C (87°F), while March is cooler, averaging only 10°C (51°F) and peaking at 22°C (72°F). Precipitation is slightly higher in March, with 116 mm (4.6 in) over 16 days compared to September's 98 mm (3.9 in) over 13 days. Humidity levels are also elevated in March at 82%, compared to September's 75%. For more details, you can check Zarautz weather in March.

When comparing the weather in September and April, we can observe some notable differences in temperature and precipitation patterns. September features a more pronounced temperature range, with minimums around 9°C (49°F) and maximums soaring to 30°C (87°F), resulting in a pleasant average of 18°C (65°F). In contrast, April’s temperatures are milder, with minimums dropping to 2°C (36°F) and maximums reaching only 24°C (75°F), leading to a cooler average of 12°C (54°F).

Precipitation levels are somewhat comparable, with September receiving 98 mm (3.9 in) over 13 days, while April experiences slightly more rainfall at 107 mm (4.2 in) over 14 days. The humidity is also higher in April, averaging 81% compared to September's 75%. For more detailed insights into the climate during this time, check out Zarautz weather in April.

In September, the weather typically features a wider temperature range, with minimums around 9°C (49°F) and maximums reaching up to 30°C (87°F), making it feel warmer overall compared to May, where temperatures range from a minimum of 4°C (40°F) to a maximum of 27°C (81°F). September sees an average temperature of 18°C (65°F) versus May's cooler average of 15°C (58°F). However, May experiences slightly more rainfall, with 115 mm (4.5 in) over about 16 days, compared to September's 98 mm (3.9 in) across 13 days. Both months have high humidity levels, with September at 75% and May at 80%. For a more detailed look, check out Zarautz weather in May.

In comparing the weather between September and June, we see some notable differences. September boasts a higher maximum temperature of 30°C (87°F) compared to June's 33°C (91°F), but June maintains a slightly lower average temperature of 17°C (64°F) versus September's 18°C (65°F). Both months start with a minimum temperature of 9°C (49°F). Precipitation levels are also a differentiating factor; September receives 98 mm (3.9 in) over 13 days, while June sees more rain with 131 mm (5.1 in) over 15 days. Additionally, humidity levels are higher in June at 81% compared to 75% in September. For a more detailed look, you can visit Zarautz weather in June.

When comparing the weather in September to July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), whereas July's temperatures range from a minimum of 11°C (53°F) to a peak of 33°C (92°F). Both months experience considerable precipitation, with September recording 98 mm over 13 days and July close behind with 91 mm over 14 days. Humidity levels are similarly high, at 75% in September compared to 80% in July. For a detailed view of July's weather patterns, you can check the following link: Zarautz weather in July.

September weather in Zarautz shows a mix of warm and cool temperatures, with a minimum of 9°C (49°F) and a maximum reaching 30°C (87°F), resulting in an average temperature of 18°C (65°F). In contrast, August tends to be warmer, with minimum temperatures of 13°C (55°F) and maximum temperatures peaking at 32°C (90°F), averaging around 20°C (68°F). While both months experience precipitation for 13 days, September receives slightly more rainfall at 98 mm (3.9 in) compared to August's 79 mm (3.1 in). Humidity levels remain similar between the two months, with September at 75% and August at 76%. For a detailed look at August conditions, you can check Zarautz weather in August.

In September, temperatures range from a mild 9°C (49°F) to a warm 30°C (87°F), with an average of 18°C (65°F), while October sees cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 27°C (81°F), averaging 15°C (59°F). September experiences slightly less precipitation at 98 mm (3.9 in) over 13 days, compared to October's 133 mm (5.2 in) spread over 14 days. Humidity also increases in October, rising from 75% in September to 81%. For more details, check out Zarautz weather in October.

In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average of 18°C (65°F). The month experiences about 98 mm (3.9 in) of precipitation spread over 13 days, along with a humidity level of 75%. In contrast, November sees a significant drop in temperatures, with a minimum of 3°C (38°F) and an average of 11°C (53°F), peaking at 22°C (73°F). Rainfall increases to 190 mm (7.5 in) across 18 days, and humidity rises to 85%. For more details, you can check Zarautz weather in November.

September and December showcase significant contrasts in weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a warm maximum of 30°C (87°F), with an average of 18°C (65°F). The month typically experiences 98 mm (3.9 in) of precipitation over 13 days and maintains a humidity level of 75%. In stark contrast, December's temperatures drop considerably, with a minimum of 0°C (32°F) and a maximum of 18°C (64°F), averaging around 10°C (50°F). Precipitation increases to 211 mm (8.3 in) across 18 days, and humidity rises to 87%. For a deeper insight into December weather, you can explore Zarautz weather in December.

Compare Zarautz's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Zarautz

As September unfolds in Zarautz, the transition to autumn brings mild temperatures that stand out against the heat of summer. With a comfortable average of 18°C (65°F) and maximums reaching up to 30°C (87°F), visitors can still enjoy warm days at the beach, albeit with a noticeable increase in precipitation. Rainfall is more frequent this month, with about 13 days of light showers contributing to a humidity level of 75%. This blend of warm afternoons and refreshing evenings makes September an appealing time for travelers who appreciate a quieter atmosphere before winter sets in. For a deeper understanding of Zarautz's climate year-round, explore Zarautz Climate.