September Weather in Les Sables-d'Olonne, France

Last updated: February 26, 2025

September in Les Sables-d'Olonne, France offers a delightful blend of warm and mild weather, with maximum temperatures reaching up to 29°C (84°F). The average temperature settles comfortably at 18°C (65°F), while nights can cool down to a refreshing 11°C (52°F). This month experiences a moderate precipitation level of 46 mm (1.8 in) spread across approximately 8 days, contributing to the region's lush landscape. With a consistent humidity level of 75%, visitors can expect a pleasant coastal climate, perfect for exploring the scenic surroundings or relaxing by the beach.

September Temperature in Les Sables-d'Olonne

In September, Les Sables-d'Olonne experiences a delightful transition as summer gracefully begins to fade. With minimum temperatures around 11°C (52°F) and pleasant averages of 18°C (65°F), the early part of the month still carries remnants of warmth, making it ideal for beach outings. On sunny days, highs can reach a comfortable 29°C (84°F), allowing for delightful afternoons by the sea. As autumn approaches, temperatures gradually drop, signaling a shift in seasons, yet September remains one of the year’s most inviting months, blending lingering summer warmth with the crispness of fall. This charming balance encourages both relaxation and outdoor adventure, ensuring that your visit is truly memorable.

September Weather in Les Sables-d'Olonne: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Les Sables-d'Olonne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec464850545965686864595249
Data source: Temperature data for Les Sables-d'Olonne 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 Les Sables-d'Olonne

In September, Les Sables-d'Olonne experiences a moderate shift in precipitation, receiving 46 mm (1.8 in) of rainfall over 8 days. This marks a slight increase compared to the drier summer months, where rainfall was notably lower in July and August, with only 30 mm (1.2 in) and 37 mm (1.5 in), respectively. As summer transitions to autumn, September's precipitation is a precursor to the wetter months ahead, signaling the onset of more consistent rainfall patterns. This trend continues into October and November, where precipitation levels rise significantly, peaking at 106 mm (4.2 in) in November, indicating a shift towards the rainiest period of the year. Overall, September serves as a gentle reminder of the changing seasons in this coastal city.

September Precipitation Trends in Les Sables-d'Olonne

The chart displays monthly precipitation patterns in Les Sables-d'Olonne, 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.
JanFebMarAprMayJunJulAugSepOctNovDec71787635596830374687106140
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Les Sables-d'Olonne

As summer turns to autumn, September in Les Sables-d'Olonne marks a notable shift in humidity levels. The month experiences a moderate 75% humidity, a slight increase from the drier July and August months that hover around 65% and 67%, respectively. This transition signals the gradual return of moisture to the coastal air, reminiscent of the wetter months ahead. October sees a rise to 85%, setting the stage for traditional autumnal dampness, while the winter months escalate further, reaching up to 90% in December. Ultimately, September serves as a bridge, blending the summer’s warmth with the chillier, more humid days of fall.

September Average Humidity in Les Sables-d'Olonne

This chart illustrates the average monthly humidity levels in Les Sables-d'Olonne, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%84%83%81%75%65%67%75%85%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Les Sables-d'Olonne

In September, Les Sables-d'Olonne experiences a notable shift in the UV Index, registering at 6, which falls into the high exposure category. This marks a gentle decline from the very high levels seen during the summer months of July and August, when the UV Index peaked at 9. As vacationers begin to pack away their sun hats, it's essential to remain vigilant, as the burn time decreases to 25 minutes. The transition into fall still offers ample sunlight, but it's crucial to take protective measures. This trend shows that while summer may be waning, the sun’s intensity remains significant into September. For more details on local UV levels, visit Les Sables-d'Olonne UV Index.

Maximum UV Index Levels in Les Sables-d'Olonne for September

The chart shows the monthly maximum UV Index (UVI) for Les Sables-d'Olonne 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.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Les Sables-d'Olonne 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 Les Sables-d'Olonne

As summer gracefully transitions into autumn, September in Les Sables-d'Olonne continues to delight with 337 hours of sunshine, making it a splendid time to soak up the last rays before the chill of winter sets in. This month retains a generous amount of daylight, though it marks a notable drop from the sun-drenched heights of July, which boasts the year’s peak at 419 hours. While the warmth slightly wanes from August’s 398 hours, the pleasant weather still invites beachgoers and outdoor enthusiasts to enjoy the vibrant coastal surroundings. Such golden hours present an ideal backdrop for exploration and relaxation, establishing September as a bridge between the lively summer days and the cozy ambiance of fall.

Monthly Sunshine Duration in Les Sables-d'Olonne: September Highlighted

The September sunshine duration represents the total number of hours Les Sables-d'Olonne 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.
JanFebMarAprMayJunJulAugSepOctNovDec151h215h298h348h399h404h419h398h337h287h235h196h
Data source: Les Sables-d'Olonne September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Les Sables-d'Olonne During September

September in Les Sables-d'Olonne, France, offers a delightful transition into autumn, with a 53% chance of sunny weather. This figure reflects a trend of increasing sunshine from the earlier months, peaking in August at 55%, before gently tapering off. The chance of sun in September remains consistently high compared to earlier spring months, showcasing a shift from the cooler, cloudier days of winter and early spring. While the sun’s embrace starts to wane as the year progresses, September still boasts a favorable probability of clear skies, making it a wonderful time for outdoor activities along the picturesque coastline.

Percentage of Sunny Days in September in Les Sables-d'Olonne

The chart illustrates the percentage of sunny days in Les Sables-d'Olonne 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 Les Sables-d'Olonne experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec23%32%52%60%39%47%49%55%53%51%41%37%
Data source: Les Sables-d'Olonne September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Les Sables-d'Olonne in September

As September arrives in Les Sables-d'Olonne, the days begin to shorten, providing a gentle transition from the vibrant summer months to the upcoming autumn. Boasting 12 hours of daylight, this month marks a noticeable decrease from the 14 hours enjoyed in August, yet it still maintains a pleasant brightness compared to the dimmer months that follow. This trend of increasing daylight from the depths of winter (with only 8 hours in December) highlights the region's long, sunlit summers, peaking in May through July with generous 15 hours. While September signals the gradual descent into shorter days, it offers a unique opportunity to savor the lingering warmth of summer evenings before the rhythm of the seasons shifts once again.

Average Daylight Hours in Les Sables-d'Olonne for September

The chart illustrates the variation in daylight duration in Les Sables-d'Olonne throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 2m10h 19m11h 56m13h 36m15h 1m15h 44m15h 21m14h 5m12h 29m10h 50m9h 23m8h 37m
Data source: Les Sables-d'Olonne daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Les Sables-d'Olonne

As summer gives way to autumn, the winds in Les Sables-d'Olonne, France, begin to soften, with September experiencing an average wind speed of 4.4 m/s (10 mph). This marks a notable decline from the summer months, where winds hovered around 5.0 to 5.1 m/s (11 to 12 mph). The tranquil breezes of September invite a sense of calm, contrasting sharply with the winter winds that pick up later in the year, characterized by speeds like 6.3 m/s (14 mph) in January and a similarly robust 6.4 m/s in December. Notably, this month serves as a gentle transition, signaling the shift from summer's vibrancy to the cooler, more invigorating winds of fall. As the days shorten and temperatures drop, the evolving wind patterns reflect the seasonal rhythm of this picturesque coastal town.

Average September Wind Speed in Les Sables-d'Olonne

The chart displays monthly wind speed patterns in Les Sables-d'Olonne, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6.36.25.25.06.24.05.15.04.4 m/s5.15.26.4
Data source: Les Sables-d'Olonne September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Les Sables-d'Olonne Compares to Other Months

The weather in Les Sables-d'Olonne 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 Les Sables-d'Olonne and find detailed weather information for every month.

September and January present strikingly different weather patterns. In September, temperatures range from a mild 11°C (52°F) to a warm maximum of 29°C (84°F), with an average of 18°C (65°F). The month sees less precipitation, totaling 46 mm (1.8 in) over about 8 days and a humidity level of 75%. In contrast, January is much cooler, with temperatures varying from a low of -2°C (28°F) to a comfortable 14°C (57°F), averaging only 8°C (46°F). Precipitation increases in January to 71 mm (2.8 in) across approximately 12 days, accompanied by higher humidity at 88%. For a more detailed look at January's climate, check out Les Sables-d'Olonne weather in January.

September and February present stark contrasts in weather patterns. In September, temperatures are generally mild, with a minimum of 11°C (52°F), an average of 18°C (65°F), and a maximum of 29°C (84°F). This month sees relatively low precipitation at 46 mm (1.8 in) over about 8 days, coupled with a humidity level of 75%. In contrast, February experiences colder temperatures, ranging from a brisk minimum of -3°C (26°F) to a maximum of 16°C (61°F), with an average of 9°C (48°F). Precipitation increases to 78 mm (3.1 in) across 13 days, and humidity rises to 87%. For more information on the winter weather in this region, you can visit Les Sables-d'Olonne weather in February.

When comparing the weather in September and March, notable differences emerge. September typically enjoys milder temperatures, with averages around 18°C (65°F) and a maximum reaching up to 29°C (84°F), while March sees lower temperatures, averaging 10°C (50°F) and peaking at 18°C (64°F). Precipitation is also a factor; September experiences 46 mm (1.8 in) over 8 days, while March has increased rainfall, totaling 76 mm (3.0 in) over 13 days. Additionally, humidity levels are slightly higher in March at 84% compared to September's 75%. For more detailed insights, check out Les Sables-d'Olonne weather in March.

In September, the weather is generally warmer, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 29°C (84°F), and an average of 18°C (65°F). The month experiences more rainfall, accumulating around 46 mm (1.8 in) over approximately 8 days, with a humidity level of 75%. In contrast, April is cooler, with temperatures starting at 2°C (36°F) and peaking at 22°C (72°F), resulting in an average of 12°C (54°F). Precipitation in April is slightly lower at 35 mm (1.4 in) over 7 days, accompanied by higher humidity at 83%. The differing weather patterns highlight the transition from the warmth of summer to the cooler temperatures of spring. For more detailed information, you can check Les Sables-d'Olonne weather in April.

When comparing the weather in September and May, we observe notable differences in temperature and precipitation. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F). This month typically sees about 46 mm (1.8 in) of rainfall spread over 8 days and a humidity level of around 75%. In contrast, May offers cooler temperatures, with a minimum of 6°C (44°F) and a maximum of 26°C (80°F), averaging at 15°C (59°F). Rainfall in May amounts to approximately 58 mm (2.3 in) across 10 days, while humidity is slightly higher at 81%. For a closer look at May's climate, check out Les Sables-d'Olonne weather in May.

When comparing the weather in September and June, we see some interesting similarities and differences. Both months feature similar minimum temperatures of 11°C (52°F) and average temperatures around 18°C (65°F), but June tends to be slightly warmer with maximum temperatures reaching up to 31°C (88°F) compared to 29°C (84°F) in September. Precipitation levels are higher in June, averaging 68 mm (2.7 in) over 10 days, compared to September's 46 mm (1.8 in) over 8 days. Despite both months exhibiting a consistent humidity level of 75%, June is generally warmer and wetter than September. For more detailed insights into June weather, you can check Les Sables-d'Olonne weather in June.

When comparing the weather in September and July, we observe a slight shift in temperatures and overall conditions. July typically enjoys warmer temperatures, with an average of 20°C (69°F) and a maximum of 30°C (87°F), while September cools down slightly, averaging 18°C (65°F) and reaching up to 29°C (84°F). The humidity is lower in July at 65%, compared to September's 75%, making July feel more comfortable overall. Additionally, September experiences more rainfall, with 46 mm (1.8 in) of precipitation over 8 days, while July has 30 mm (1.2 in) over just 7 days. For more details, you can check out Les Sables-d'Olonne weather in July.

In comparing the weather of September and August, September exhibits slightly cooler temperatures, with a minimum of 11°C and an average of 18°C, compared to August's minimum of 13°C and an average of 20°C. The maximum temperatures are similar, peaking at 29°C in September and 30°C in August. Notably, September experiences a bit more precipitation, with 46 mm over 8 days, whereas August receives less, at 37 mm over 6 days. Additionally, September has higher humidity at 75%, compared to 67% in August, indicating a more humid atmosphere as summer transitions into autumn. For a more detailed look at the weather patterns, check out Les Sables-d'Olonne weather in August.

In September, the weather typically features milder temperatures, with a minimum of 11°C (52°F) and an average of 18°C (65°F), reaching a maximum of 29°C (84°F). The month sees about 46 mm (1.8 in) of precipitation over approximately 8 days, accompanied by a humidity level of 75%.

By contrast, October experiences cooler temperatures, dropping to a minimum of 4°C (40°F) and averaging 15°C (59°F), peaking at 22°C (72°F). This month also tends to be wetter, with precipitation increasing to 87 mm (3.4 in) spread over 13 days, and the humidity rising to 85%. For a more detailed look at the climate specifics, you can check Les Sables-d'Olonne weather in October.

In September, the weather is generally milder with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 29°C (84°F), averaging around 18°C (65°F). This month sees relatively low precipitation, averaging 46 mm (1.8 in) over about 8 days, accompanied by a humidity level of 75%. In contrast, November presents a stark shift as temperatures drop significantly, with a minimum of 3°C (37°F) and a maximum of 18°C (65°F), averaging just 11°C (52°F). The rain is more frequent and heavier, totaling 106 mm (4.2 in) over 13 days, and the humidity rises to 88%. For more detailed insights, visit Les Sables-d'Olonne weather in November.

In September, the weather in Les Sables-d'Olonne is typically mild, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 29°C (84°F). The average temperature hovers around 18°C (65°F), and the area experiences around 46 mm (1.8 in) of precipitation over approximately 8 days, accompanied by a moderate humidity of 75%.

In contrast, December brings significantly cooler conditions, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of just 15°C (59°F), and an average temperature of only 10°C (50°F). The month is also much wetter, with precipitation reaching 140 mm (5.5 in) across about 18 days, contributing to a higher humidity level of 90%. For more detailed information about the December climate, you can visit Les Sables-d'Olonne weather in December.

Compare Les Sables-d'Olonne's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Les Sables-d'Olonne

As summer gracefully transitions into autumn, September in Les Sables-d'Olonne offers a delightful shift in weather, characterized by milder temperatures and an increase in humidity, making it a perfect time for outdoor exploration. This month stands out with its comfortable averages and occasional warm spells, providing a stark contrast to the hotter, drier summer months. While brief rain showers may appear, they only add to the charm of this coastal haven, encouraging visitors to enjoy both sunny days and refreshing evenings by the shoreline. For a deeper insight into what to expect throughout the year, check out Les Sables-d'Olonne Climate.