September Weather in Les Arcs, France

Last updated: February 26, 2025

In September, Les Arcs, France experiences a delightful transition into autumn, with temperatures peaking at a maximum of 29°C (84°F) and settling to an average of 20°C (68°F). As the month progresses, the crispness of fall becomes apparent, with nighttime lows around 8°C (47°F). Rainfall is moderate, with approximately 45 mm (1.8 in) over about 6 days, adding a refreshing touch to the landscape. Humidity hovers at a comfortable 71%, creating an inviting atmosphere for both outdoor adventures and cozy indoor retreats.

September Temperature in Les Arcs

In September, Les Arcs begins to transition from the warmth of summer to the crispness of autumn. With temperatures ranging from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), this month showcases a delightful balance, featuring an average temperature of 20°C (68°F) that invites both outdoor adventurers and those seeking relaxation. As the days grow shorter, the refreshing coolness in the mornings hints at the approaching winter, while the pleasant afternoons still allow for some late-season sun. This blend of warm daytime temperatures and cooler nights creates an ideal setting to enjoy the stunning Alpine scenery and partake in various autumn activities, making September a truly enchanting time to visit Les Arcs.

September Weather in Les Arcs: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Les Arcs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec454850556270757568615246
Data source: Temperature data for Les Arcs 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 Arcs

In September, Les Arcs experiences a moderate amount of precipitation, receiving 45 mm (1.8 in) over approximately 6 days of rain. This marks a noticeable increase compared to the dry summer months of July and August, which recorded only 23 mm (0.9 in) and 17 mm (0.7 in) respectively. As autumn approaches, the region transitions from the parched conditions of summer, hinting at the wetter months ahead. October is poised to bring a significant spike in rainfall, averaging 108 mm (4.3 in), indicating a seasonal shift where nature replenishes itself after the drier periods. The gradual rise in precipitation levels throughout the late summer and early fall showcases the region’s dynamic weather patterns as it prepares for the winter snows.

September Precipitation Trends in Les Arcs

The chart displays monthly precipitation patterns in Les Arcs, 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.
JanFebMarAprMayJunJulAugSepOctNovDec41496777754523174510812490
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Les Arcs

As September arrives in Les Arcs, France, the humidity begins to show signs of a gentle transition from summer to autumn. With humidity levels resting at 71%, September maintains a comfortable balance—moderately humid yet refreshing. This month, while slightly higher than the dry warmth of August at 66%, marks a return to the moderate humidity typical of late spring. It's part of a broader trend where humidity levels fluctuate throughout the year; they peak in winter months like January and November at around 80% to 82%, and gently decline through the summer before rising again as the cooler months approach. This cyclic pattern creates a unique atmosphere, showcasing the region's dynamic climate while inviting visitors to enjoy the crisp, invigorating air of early autumn.

September Average Humidity in Les Arcs

This chart illustrates the average monthly humidity levels in Les Arcs, 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.
JanFebMarAprMayJunJulAugSepOctNovDec80%74%71%75%74%72%69%66%71%78%82%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Les Arcs

As summer fades to autumn in September, the UV Index in Les Arcs, France begins to decline, though it remains significant with a value of 7, classified as high. This drop from August's peak reflects the transitioning season, offering a burn time of 25 minutes before skin protection becomes essential. Interestingly, while the intensity of UV radiation decreases compared to the summer months, September still demands attention to sun safety, especially for outdoor enthusiasts enjoying the scenic beauty of the region. As the days shorten and temperatures cool, it's an ideal time to embrace nature while keeping an eye on UV levels—revealing that sun protection remains crucial year-round. For detailed insights, explore the Les Arcs UV Index.

Maximum UV Index Levels in Les Arcs for September

The chart shows the monthly maximum UV Index (UVI) for Les Arcs 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.
JanFebMarAprMayJunJulAugSepOctNovDec2467910997532
Data source: Les Arcs 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 Arcs

As summer transitions to autumn, September in Les Arcs, France continues to bask in the warm embrace of sunshine, accumulating a commendable 346 hours of sunlight. This month, while slightly less than the peak of July, showcases a reassuring consistency following the busy summer, with hours remaining robust compared to earlier months. The gradual decline from 422 hours in June to 346 in September signals the inevitable shift towards shorter days, yet the lingering warmth invites outdoor adventures and stunning alpine landscapes. As the summer sun starts to wane, September offers a perfect balance, making it an ideal time to savor the beauty of Les Arcs before the crisp chill of autumn settles in.

Monthly Sunshine Duration in Les Arcs: September Highlighted

The September sunshine duration represents the total number of hours Les Arcs 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.
JanFebMarAprMayJunJulAugSepOctNovDec199h258h332h351h408h422h438h407h346h311h250h245h
Data source: Les Arcs September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Les Arcs During September

As summer gives way to autumn, September in Les Arcs, France, showcases a notable shift in weather patterns, with a 53% chance of sunny days to enjoy the breathtaking alpine scenery. This month leads the transition from the sun-drenched days of August, which boasts a generous 72% sunshine likelihood, gradually returning to milder conditions. Interestingly, September's sunshine probability is a touch lower than October's 55%, suggesting that while the warmth begins to recede, lingering summer vibes can still be felt. Overall, visitors can expect a delightful mix of sun and cooler air, making it an ideal time for outdoor activities amidst the stunning fall colors.

Percentage of Sunny Days in September in Les Arcs

The chart illustrates the percentage of sunny days in Les Arcs 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 Arcs experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%49%63%47%49%54%62%72%53%55%49%58%
Data source: Les Arcs September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Les Arcs in September

As summer fades into autumn, September in Les Arcs, France, brings a gentle transition in daylight, with an average of 12 hours. This marks a subtle shift from the longer days of July and June, which bask in 15 hours of sunlight, to the shorter, cozy days of autumn characterized by 10 hours in October. With each passing month from March's invigorating 11 hours to the peak of 14 hours in May, the gradual decrease of daylight is a reminder of nature's rhythm. As the days grow shorter, the warmth of summer begins to give way to the crispness of fall, setting the stage for a beautiful change in both scenery and atmosphere.

Average Daylight Hours in Les Arcs for September

The chart illustrates the variation in daylight duration in Les Arcs 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 20m15h13h 53m12h 27m10h 58m9h 40m8h 59m
Data source: Les Arcs daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Les Arcs

In September, the winds in Les Arcs, France typically calm down a bit, averaging around 2.6 m/s (6 mph), marking a steady end to the summer breezes. Throughout the year, wind speeds were generally mild, with the highest gusts occurring in May at 4.0 m/s (9 mph). As the seasons transition, September's winds reflect a trend of gentle breezes that lead into the cooler autumn months. This gradual decrease from the bustling winds of earlier summer months is not only a soothing change for nature enthusiasts but also sets the stage for the serene, colorful landscapes that fall brings. Overall, the consistent wind patterns create an inviting atmosphere for outdoor activities, making Les Arcs a charming destination year-round.

Average September Wind Speed in Les Arcs

The chart displays monthly wind speed patterns in Les Arcs, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.63.32.82.64.02.52.72.82.6 m/s2.73.22.8
Data source: Les Arcs September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Les Arcs Compares to Other Months

The weather in Les Arcs 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 Arcs and find detailed weather information for every month.

September and January present starkly contrasting weather conditions. In September, temperatures range from a mild low of 8°C (47°F) to a warm high of 29°C (84°F), with an average of 20°C (68°F). The month sees about 45 mm (1.8 in) of precipitation over six days, coupled with a humidity level of 71%. In contrast, January is much colder, with temperatures dipping to a minimum of -3°C (26°F) and peaking at only 15°C (60°F), averaging around 7°C (45°F). Precipitation is slightly lower at 41 mm (1.6 in) across five days, and humidity rises to 80%. For more detailed information about January weather, you can check Les Arcs weather in January.

September and February present contrasting weather patterns. In September, temperatures range from a mild 8°C (47°F) to a warm 29°C (84°F), with an average of 20°C (68°F), making it ideal for outdoor activities. The month sees about 45 mm (1.8 in) of precipitation across 6 days, with humidity hovering around 71%. In stark contrast, February experiences much cooler temperatures, with lows dipping to -6°C (21°F) and an average of 9°C (48°F), peaking at 20°C (68°F). Precipitation increases slightly to 49 mm (1.9 in) over 7 days, and humidity remains relatively high at 73%. For more details on February weather, visit Les Arcs weather in February.

When comparing the weather in September and March, it's clear that these two months present distinct seasonal characteristics. September typically enjoys milder temperatures, with a minimum of 8°C (47°F) and an average high of 29°C (84°F), while March is much colder, with temperatures ranging from a minimum of -2°C (30°F) to an average high of 19°C (67°F). Precipitation levels also differ; September sees 45 mm (1.8 in) of rain over about 6 days, whereas March has a higher total of 67 mm (2.6 in) spread across 7 days. Interestingly, both months share the same humidity level of 71%, creating a consistent moisture presence in the air. For more detailed weather information in March, you can check Les Arcs weather in March.

In comparing the weather of September and April, we see notable differences in temperature and precipitation. September boasts warmer conditions, with average temperatures around 20°C (68°F) and highs reaching up to 29°C (84°F), while April has a cooler average temperature of 13°C (55°F), with maximums around 23°C (74°F). Additionally, April tends to experience more precipitation, with 77 mm (3.0 in) over 11 days compared to September's 45 mm (1.8 in) over 6 days. Despite higher humidity in both months (71% in September and 75% in April), the overall feel of the seasons differs significantly, reflecting the transition from summer to fall and from winter to spring. For a more detailed look at April weather, you can visit Les Arcs weather in April.

September and May present contrasting weather patterns, with May generally experiencing cooler temperatures and higher precipitation. In September, the average temperature reaches a comfortable 20°C (68°F), with highs of 29°C (84°F), while May's average temperature is slightly lower at 17°C (62°F), peaking at 28°C (83°F). However, May sees more rainfall, accumulating 75 mm (3.0 in) over 11 days, compared to September's 45 mm (1.8 in) over just 6 days. Humidity levels are similar in both months, with September at 71% and May slightly higher at 74%. For additional insights into the weather during May, you can visit Les Arcs weather in May.

In comparing the weather of September and June, we observe some notable differences. September tends to be slightly cooler, with average temperatures ranging from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), while June offers a warmer experience, ranging from a minimum of 11°C (52°F) to a maximum of 33°C (91°F). Both months see similar levels of precipitation, around 45 mm (1.8 in), with September experiencing rain on 6 days compared to June's 7 days. Humidity levels are also comparable, at 71% for September and 72% for June. For a more detailed look at June weather patterns, you can check out Les Arcs weather in June.

In comparing the weather of September and July, we see notable differences in temperature and precipitation. September experiences a more varied temperature range, with a minimum of 8°C (47°F) and a maximum of 29°C (84°F), while July is warmer, featuring a minimum of 15°C (59°F) and a maximum of 32°C (90°F). Additionally, September sees more precipitation, totaling 45 mm (1.8 in) across six days, compared to July's milder 23 mm (0.9 in) over just four days. Humidity levels are slightly higher in September at 71%, while July maintains a comfortable 69%. For further insights on July weather, check out Les Arcs weather in July.

In comparing the weather between August and September, September experiences cooler temperatures with a minimum of 8°C (47°F) and an average high of 29°C (84°F), contrasting sharply with August's warmer minimum of 15°C (59°F) and a peak of 33°C (91°F). While September sees a moderate amount of precipitation at 45 mm (1.8 in) over 6 days, August is decidedly drier, recording only 17 mm (0.7 in) across 5 days. Additionally, September's humidity is slightly higher at 71%, compared to 66% in August, indicating a shift towards a more humid atmosphere as summer winds down. For more detailed insights on the weather in August, you can visit Les Arcs weather in August.

September and October exhibit noticeable shifts in weather patterns. In September, temperatures range from a mild minimum of 8°C (47°F) to a warm maximum of 29°C (84°F), averaging around 20°C (68°F). The month sees moderate precipitation levels of 45 mm (1.8 in) over just 6 days, with a humidity level of 71%. In contrast, October brings cooler temperatures, with a minimum of 4°C (40°F) and an average of 16°C (61°F), peaking at 27°C (80°F). This month also experiences more substantial rainfall, totaling 108 mm (4.3 in) spread over 8 days, and a slight increase in humidity to 78%. For a detailed look at the weather in October, you can check out Les Arcs weather in October.

September offers a much warmer climate with temperatures ranging from a minimum of 8°C (47°F) to a pleasant average of 20°C (68°F), peaking at a comfortable 29°C (84°F). This month experiences relatively low precipitation, with around 45 mm (1.8 in) falling over just 6 days, and humidity levels are manageable at 71%.

In contrast, November brings cooler weather, with temperatures dropping significantly, ranging from a minimum of 1°C (34°F) to an average of 11°C (52°F), and a maximum of 20°C (68°F). This month is wetter, with precipitation rising to 124 mm (4.9 in) over 11 days, and humidity also increases to 82%. For more detailed insights, check out Les Arcs weather in November.

In September, the weather is generally mild and pleasant, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), featuring an average temperature of 20°C (68°F). This month sees approximately 45 mm (1.8 in) of precipitation over about 6 days, and humidity levels are lower at around 71%. By contrast, December brings much colder conditions, with temperatures dropping to a minimum of -3°C (27°F) and reaching a maximum of 17°C (63°F), resulting in an average temperature of 8°C (46°F). Precipitation increases significantly to 90 mm (3.5 in) across 7 days, and humidity rises to 79%. For a detailed look at the conditions during December, you can check Les Arcs weather in December.

Compare Les Arcs's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Les Arcs

As September unfolds in Les Arcs, a unique charm graces the region, marking a departure from the hotter summer months. With the average temperature settling comfortably around 20°C, visitors can relish in mild days and cool nights, making it an ideal time for outdoor adventures. Although occasional rain falls on about six days of the month, the overall ambiance remains delightful, with a humidity level that adds to the freshness of the air. This transitional month offers a perfect blend of warmth and crispness, inviting you to explore the enchanting landscapes of Les Arcs. For a deeper understanding of the seasonal trends, check out the detailed insights available at Les Arcs Climate.