September Weather in Saint-Jean-de-Luz, France

Last updated: February 26, 2025

Experience the delightful September weather of Saint-Jean-de-Luz, France, where the Mediterranean charm truly shines. With maximum temperatures reaching 32°C (90°F) and a comfortable average of 20°C (68°F), this coastal town offers a pleasant escape. Although you may encounter 11 days of rainfall, totaling 101 mm (4.0 in), the air remains inviting with a humidity level of 75%. Enjoy the refreshing coastal breezes and the vibrant atmosphere that make this charming destination a perfect spot for both relaxation and adventure.

September Temperature in Saint-Jean-de-Luz

In September, Saint-Jean-de-Luz basks in a climate that beautifully bridges the summer's warmth and the approach of autumn. With minimum temperatures settling at a mild 13°C (56°F) and averaging a comfortable 20°C (68°F), the weather still offers plenty of opportunity for outdoor adventures. The maximum temperature can reach a generous 32°C (90°F), allowing for lingering days by the beach or exploration of the picturesque surroundings. As the month progresses, you’ll notice a gentle shift toward cooler evenings and the vibrant hues of fall, making September an ideal time to experience this charming French coastal town before the crowds diminish.

September Weather in Saint-Jean-de-Luz: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint-Jean-de-Luz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec495253566065697068625553
Data source: Temperature data for Saint-Jean-de-Luz 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 Saint-Jean-de-Luz

As summer transitions to autumn, September in Saint-Jean-de-Luz experiences a noticeable increase in precipitation, with 101 mm (4.0 in) of rain falling over 11 days. This uptick follows the drier months of July and August, where rainfall dwindled to 74 mm and 68 mm respectively. The arrival of September brings back a moderate moisture level akin to that of spring, suggesting a shift in weather patterns as the region prepares for the wetter months ahead. While the rainfall isn't as abundant as later in the year, it marks a significant change in the climate, hinting at the rich, vibrant landscapes that autumn will soon unveil.

September Precipitation Trends in Saint-Jean-de-Luz

The chart displays monthly precipitation patterns in Saint-Jean-de-Luz, 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.
JanFebMarAprMayJunJulAugSepOctNovDec152127118901191047468101134226256
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Jean-de-Luz

In September, the humidity in Saint-Jean-de-Luz, France dips to a comfortable 75%, marking the end of the summer season. This slight decrease reflects a broader trend of declining humidity from the peak of 86% in January down to 76% in August, showcasing the region's transition towards cooler autumn months. As temperatures begin to cool, humidity levels generally align more closely with those of the spring and early fall, suggesting a refreshing shift in the coastal air. Interestingly, as the year progresses from September onward, humidity starts to rise again, with figures climbing back to 81% in October, hinting at the return of a wetter climate as winter approaches.

September Average Humidity in Saint-Jean-de-Luz

This chart illustrates the average monthly humidity levels in Saint-Jean-de-Luz, 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 Saint-Jean-de-Luz

As summer fades into autumn in Saint-Jean-de-Luz, the UV Index in September reflects a transition with a value of 7, categorized as high. This signals that, while the sun's intensity begins to wane, caution is still necessary, particularly for prolonged outdoor activities with a burn time of 25 minutes. Compared to the peak summer months, when UV levels reached 10, September still offers ample opportunity for sun-seekers, though they should remain mindful of the changing conditions. As the year progresses, the UV Index is expected to settle further, highlighting the importance of protective measures as we move into the cooler months. For more detailed information, you can visit Saint-Jean-de-Luz UV Index.

Maximum UV Index Levels in Saint-Jean-de-Luz for September

The chart shows the monthly maximum UV Index (UVI) for Saint-Jean-de-Luz 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.
JanFebMarAprMayJunJulAugSepOctNovDec24579101097532
Data source: Saint-Jean-de-Luz 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 Saint-Jean-de-Luz

September in Saint-Jean-de-Luz is a delightful blend of late summer warmth and early autumn charm, boasting an impressive 338 hours of sunlight. After the peak of 410 hours in July, the sun graces the shores with a gentle touch, making it a perfect time for beach strolls and outdoor cafes. The sunlit days gradually taper into fall, yet September shines brighter than the chilly months ahead, such as October's 295 hours and November's 232 hours. Visitors can revel in a robust dose of sunshine that enriches the vibrant coastal scenery, providing an enchanting backdrop for both relaxation and exploration.

Monthly Sunshine Duration in Saint-Jean-de-Luz: September Highlighted

The September sunshine duration represents the total number of hours Saint-Jean-de-Luz 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.
JanFebMarAprMayJunJulAugSepOctNovDec172h243h310h338h378h393h410h388h338h295h232h207h
Data source: Saint-Jean-de-Luz September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint-Jean-de-Luz During September

September in Saint-Jean-de-Luz enjoys a 34% chance of sunny weather, placing it in the mid-range of the year’s sunshine spectrum. As summer winds down, this likelihood reflects a slight dip from the more radiant days of August, which boasts a 44% chance. The trend shows that while early spring often ushers in considerable sun with a 49% chance in March, the sunny conditions tend to fluctuate, peaking in the summer months and then tapering off into fall. Thus, while September offers glimpses of sun, it’s part of a broader pattern that sees more reliable sunshine in the summer, making it a delightful yet somewhat unpredictable time of year.

Percentage of Sunny Days in September in Saint-Jean-de-Luz

The chart illustrates the percentage of sunny days in Saint-Jean-de-Luz 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 Saint-Jean-de-Luz experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec23%23%49%43%33%34%40%44%34%42%21%37%
Data source: Saint-Jean-de-Luz September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint-Jean-de-Luz in September

As summer transitions to autumn in Saint-Jean-de-Luz, France, September brings a gentle decline in daylight, offering about 12 hours of sunshine each day. This gradual shift follows the peak of 15 hours in June, with sunlight steadily decreasing over the months. While September still enjoys ample daylight, it marks a notable change from the vibrant summer days. Ahead lies October, which will reduce daylight further to 10 hours, echoing the lingering warmth of summer before the shorter days of winter set in. This rhythm of light not only shapes daily life but also enhances the natural beauty of this coastal haven as it prepares for the changing seasons.

Average Daylight Hours in Saint-Jean-de-Luz for September

The chart illustrates the variation in daylight duration in Saint-Jean-de-Luz throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 21m10h 30m11h 57m13h 26m14h 42m15h 20m14h 59m13h 52m12h 27m10h 58m9h 40m9h
Data source: Saint-Jean-de-Luz daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Saint-Jean-de-Luz

As summer wanes and September graces Saint-Jean-de-Luz, the winds begin to whisper a subtle transition, settling at an average speed of 3.5 m/s (8 mph), mirroring the gentle breezes of August. This steady calm signifies a broader seasonal trend, where the winds gradually diminish from the more lively gusts experienced in the colder months. With wind speeds peaking at 5.8 m/s (13 mph) in February and slowly descending to the summer lows, September stands as a sweet spot of tranquility before the autumnal increase begins in October. The shift creates an inviting atmosphere perfect for seaside strolls, as locals and visitors alike enjoy the lingering warmth of early fall under the azure skies of this charming coastal town.

Average September Wind Speed in Saint-Jean-de-Luz

The chart displays monthly wind speed patterns in Saint-Jean-de-Luz, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.65.84.24.24.14.03.73.53.5 m/s4.04.65.9
Data source: Saint-Jean-de-Luz September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Saint-Jean-de-Luz Compares to Other Months

The weather in Saint-Jean-de-Luz 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 Saint-Jean-de-Luz and find detailed weather information for every month.

September and January showcase stark contrasts in weather. In September, temperatures range from a mild 13°C (56°F) at night to a warm 32°C (90°F) during the day, accompanied by an average of 20°C (68°F). While this month experiences substantial precipitation of 101 mm (4.0 in) over 11 days, humidity is a moderate 75%. In contrast, January brings much cooler temperatures, with minimums dipping to 0°C (33°F) and a maximum of 19°C (66°F), culminating in an average of just 9°C (49°F). This winter month sees even greater precipitation, totaling 152 mm (6.0 in) across 14 days, and a higher humidity level of 86%. For more details, you can check Saint-Jean-de-Luz weather in January.

When comparing the weather in September and February, notable differences emerge in temperature and precipitation. September typically enjoys milder temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). In contrast, February is much cooler, with temperatures dropping to a minimum of -1°C (31°F) and averaging 11°C (52°F), peaking at 21°C (70°F). Precipitation also varies, with September receiving 101 mm (4.0 in) over 11 days, while February sees a bit more rain at 127 mm (5.0 in) across 13 days. Additionally, February exhibits higher humidity levels at 85%, compared to September's 75%. For a more detailed look at the weather patterns in February, visit Saint-Jean-de-Luz weather in February.

In comparing the weather of September and March, a significant difference in temperature is evident, as September features a warmer climate with average temperatures around 20°C (68°F) and a maximum of 32°C (90°F). In contrast, March presents cooler conditions, with average temperatures at 12°C (53°F) and a maximum of only 22°C (72°F). Additionally, September experiences less precipitation, totaling 101 mm (4.0 in) over 11 days, while March is wetter, with 118 mm (4.6 in) of rain over 16 days. Humidity levels are also higher in March at 82% compared to September's 75%. For more detailed information, you can check Saint-Jean-de-Luz weather in March.

September and April present notably different weather patterns. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), with an average temperature of 20°C (68°F). In contrast, April is cooler, with temperatures ranging from 5°C (40°F) to a maximum of 23°C (74°F), averaging just 13°C (56°F). While September experiences slightly more rainfall at 101 mm (4.0 in) over 11 days, April follows closely with 90 mm (3.5 in) over 12 days, accompanied by higher humidity levels in April at 81% compared to 75% in September. For more detailed insights on the weather, please check Saint-Jean-de-Luz weather in April.

When comparing the weather in September and May, September typically experiences warmer temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), with an average temperature of 20°C (68°F). In contrast, May starts cooler, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 28°C (83°F) and an average of 16°C (60°F). While September sees about 101 mm (4.0 in) of precipitation over 11 days, May has slightly higher precipitation with 119 mm (4.7 in) over 15 days. Additionally, humidity levels are comparable, with September at 75% and May slightly higher at 80%. For more detailed information about May weather, you can check Saint-Jean-de-Luz weather in May.

When comparing the weather in September and June, both months exhibit similar maximum temperatures, reaching up to 32°C (90°F). However, September tends to be slightly warmer, with an average temperature of 20°C (68°F) compared to June's 19°C (66°F). Precipitation levels are quite comparable, with June experiencing 104 mm (4.1 in) over 13 days and September having 101 mm (4.0 in) over 11 days. Humidity is higher in June, averaging 81%, while September has a slightly lower humidity level of 75%. For more details, you can check Saint-Jean-de-Luz weather in June.

When comparing the weather in September and July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), while July showcases temperatures from a minimum of 15°C (59°F) to a maximum of 33°C (92°F). Both months witness a similar amount of rainfall, with September receiving 101 mm (4.0 in) over 11 days compared to July's 74 mm (2.9 in) across the same number of days. Additionally, humidity levels are marginally lower in September at 75%, compared to July's 80%. For more insights into July weather specifics, you can check Saint-Jean-de-Luz weather in July.

In comparing the weather of September to August, we observe that September experiences slightly cooler average temperatures, with a minimum of 13°C (56°F) and a maximum of 32°C (90°F), compared to August’s minimum of 15°C (59°F) and maximum of 31°C (87°F). While the average temperature for both months is fairly similar, September has increased precipitation, totaling 101 mm (4.0 in) over 11 days, compared to August's 68 mm (2.7 in) across 12 days. Humidity also remains high, with September at 75% and August marginally higher at 76%. For more detailed weather information about August, you can check Saint-Jean-de-Luz weather in August.

In September, the weather is generally warmer, with daily temperatures ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F) and an average of 20°C (68°F). The month witnesses about 101 mm (4.0 in) of precipitation over 11 days, accompanied by a humidity level of 75%. In contrast, October brings cooler temperatures, with lows dropping to 8°C (47°F) and highs reaching only 26°C (79°F), while the average temperature falls to 17°C (63°F). Precipitation increases to 134 mm (5.3 in), occurring over 14 days, and humidity rises slightly to 81%. For more detailed information, visit Saint-Jean-de-Luz weather in October.

In September, the weather is generally warmer, with temperatures ranging from a pleasant 13°C (56°F) at night to a warm 32°C (90°F) during the day, averaging around 20°C (68°F). The month typically sees 101 mm (4.0 in) of rain over about 11 days, with humidity levels at 75%. Conversely, November experiences noticeably cooler temperatures, with highs averaging only 22°C (72°F) and lows dipping to 7°C (45°F), leading to an average of 13°C (56°F). Additionally, November is wetter, recording 226 mm (8.9 in) of precipitation over 17 days and higher humidity at 85%. For a more detailed look at what to expect, check out Saint-Jean-de-Luz weather in November.

In September, the weather is much warmer, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), averaging around 20°C (68°F). The month experiences about 101 mm (4.0 in) of precipitation over 11 days and has a humidity level of 75%. In contrast, December brings cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 18°C (64°F), averaging only 12°C (53°F). The month sees significantly higher precipitation, totaling 256 mm (10.1 in) over 17 days, and the humidity increases to 87%. For more detailed weather information, you can check out Saint-Jean-de-Luz weather in December.

Compare Saint-Jean-de-Luz's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Saint-Jean-de-Luz

As summer fades into autumn, September in Saint-Jean-de-Luz offers a delightful transition marked by mild temperatures and increased humidity. With average highs around 20°C, the weather remains pleasantly warm, especially compared to the cooler months ahead. Though rainfall is more frequent this month, with about 11 days of precipitation, it’s a refreshing change from the potential heatwaves of August. Nature’s colors begin to shift, setting the scene for a beautiful coastal autumn. For a deeper dive into the weather patterns, check out the detailed insights at Saint-Jean-de-Luz Climate.