September Weather in Chamrousse, France

Last updated: February 26, 2025

In September, Chamrousse, France, experiences a captivating blend of temperatures and weather conditions that define the transition from summer to autumn. With a maximum temperature reaching 24°C (75°F) and an average of 12°C (54°F), visitors can expect mild days ideal for outdoor activities. However, nighttime brings a chill, as temperatures can plummet to a minimum of -6°C (21°F). The month is characterized by 97 mm (3.8 in) of precipitation spread over 12 days, resulting in a humidity level of 73%, creating a refreshing atmosphere amidst the changing foliage. Whether you're a hiking enthusiast or simply seeking to enjoy the serene landscapes, September in Chamrousse offers a delightful experience.

September Temperature in Chamrousse

In September, Chamrousse, France experiences a refreshing transition from the warmth of summer to the crispness of autumn. With minimum temperatures dipping to -6°C (21°F) and average highs reaching a comfortable 24°C (75°F), this month offers a delightful blend of cool mornings and mild afternoons. The average temperature settles around 12°C (54°F), reflecting the gradual decrease from the summer highs. As the trails begin to shed their summer greenery and the leaves start to turn, September invites outdoor enthusiasts to enjoy the stunning landscapes before the winter chill sets in, making it a perfect time for hiking and appreciating the majestic scenery of the French Alps.

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

The chart illustrates September temperature patterns in Chamrousse, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec273337435059626154463629
Data source: Temperature data for Chamrousse generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Chamrousse

In September, Chamrousse, France, experiences a moderate decline in precipitation, receiving 97 mm (3.8 in) over 12 days. This marks a noticeable shift from the wetter months of summer, reflecting the transition into autumn. While precipitation is still consistent, it's notably less than the lush amounts recorded in May and June, suggesting a gradual drying trend as the landscape prepares for the colder months ahead. Despite this decrease, September still provides a refreshing backdrop of crisp air and vibrant foliage, making it an inviting time for outdoor activities amidst the changing seasons.

September Precipitation Trends in Chamrousse

The chart displays monthly precipitation patterns in Chamrousse, 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.
JanFebMarAprMayJunJulAugSepOctNovDec12711715510021317312012597124126247
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chamrousse

In Chamrousse, France, the month of September marks a notable shift in humidity levels as summer gives way to early autumn. With humidity dipping to 73%, September stands out as a transitional period, following the more comfortable months of July and August, which experienced their lowest averages, at 72% and 63% respectively. This fluctuation illustrates a gradual return to higher moisture levels as autumn approaches, with humidity spiking again in the following month, October, when it climbs to 89%. Overall, the trend reflects a steady decline through the summer months, culminating in a slight increase as the year progresses, setting the stage for the more humid winter season ahead.

September Average Humidity in Chamrousse

This chart illustrates the average monthly humidity levels in Chamrousse, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%84%83%78%75%72%63%73%89%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chamrousse

In September, Chamrousse experiences a notable shift in its UV Index, registering at 7, which falls into the high exposure category. With a recommended burn time of 25 minutes, it’s essential for outdoor enthusiasts to remain vigilant about sun protection during this month. While the index is a step down from the very high levels seen in the peak summer months of June and July, September still demands attention as it transitions to a more moderate UV landscape in October. This trend highlights the importance of adapting sun safety practices as the seasons change. For those planning outdoor activities, it's wise to stay informed by checking the latest UV Index details at Chamrousse UV Index.

Maximum UV Index Levels in Chamrousse for September

The chart shows the monthly maximum UV Index (UVI) for Chamrousse 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.
JanFebMarAprMayJunJulAugSepOctNovDec34689101097532
Data source: Chamrousse 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 Chamrousse

In Chamrousse, France, the September sunshine continues a delightful trend from the vibrant summer months, offering an impressive 337 hours of sunlight. This marks a gentle decline from the peak brightness of July and August, where the alpine landscape basked in 430 and 399 hours, respectively. As the season shifts, September still provides ample opportunities for outdoor adventures, with its clear skies and crisp air inviting visitors to experience the stunning natural beauty of the region. While the sun’s embrace begins to wane in the upcoming months, with October bringing 293 hours, the lingering warmth of September ensures that the allure of Chamrousse remains strong as autumn unfolds.

Monthly Sunshine Duration in Chamrousse: September Highlighted

The September sunshine duration represents the total number of hours Chamrousse 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.
JanFebMarAprMayJunJulAugSepOctNovDec178h242h314h345h371h402h430h399h337h293h229h213h
Data source: Chamrousse September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Chamrousse During September

September in Chamrousse, France offers a moderate chance of sunny weather, with approximately 37% of the days expected to be bright. This month follows the peak of summer sunshine seen in August, which boasts a higher likelihood at 47%. As the seasons transition, September's sunlit days begin to taper off, reminiscent of the warmer months, yet still outshine the earlier months of the year like January and May, which see only 21% and 33% sunny days, respectively. With autumn's approach, September stands as a delightful blend of warmth and comfortable weather, making it a lovely time for outdoor activities in the picturesque landscapes of the French Alps.

Percentage of Sunny Days in September in Chamrousse

The chart illustrates the percentage of sunny days in Chamrousse 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 Chamrousse experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec21%39%48%45%33%34%36%47%37%45%36%44%
Data source: Chamrousse September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Chamrousse in September

As summer fades into autumn, September in Chamrousse, France, marks a gentle transition in daylight hours. With 12 hours of daylight, this month sees a noticeable decline from the sun-soaked days of July and August, which boasted 15 and 14 hours, respectively. The gradual shortening of days begins in earnest, setting the stage for the cozy ambiance of fall. Following the vibrant spring and summer, September offers a balanced blend of light and shadow, inviting visitors to experience the serene beauty of the mountains as nature prepares for the winter retreat. As daylight diminishes, the enchanting colors of autumn foliage emerge, creating a picturesque backdrop for leisurely hikes and outdoor adventures.

Average Daylight Hours in Chamrousse for September

The chart illustrates the variation in daylight duration in Chamrousse throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 10m10h 23m11h 56m13h 32m14h 53m15h 34m15h 12m14h12h 28m10h 54m9h 30m8h 47m
Data source: Chamrousse daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Chamrousse

As September rolls into Chamrousse, France, a subtle shift in the wind begins to reveal the onset of autumn. The average wind speed dips slightly to 1.1 m/s (2 mph), making this month the calmest since early spring. This gentle breeze contrasts with the slightly brisker conditions felt earlier in the year, where winds consistently hovered around 1.2 to 1.4 m/s (3 mph). With summer winds fading, September invites a serene atmosphere that encourages outdoor exploration amid the changing foliage, suggesting a tranquil transition toward cooler months ahead. As the landscape transforms, the mellow winds whisper promises of the vibrant autumn days yet to come.

Average September Wind Speed in Chamrousse

The chart displays monthly wind speed patterns in Chamrousse, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.21.41.21.21.31.21.21.21.1 m/s1.41.11.3
Data source: Chamrousse September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Chamrousse Compares to Other Months

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

September and January present stark contrasts in weather conditions. In September, temperatures range from a chilly -6°C (21°F) at night to a pleasant average of 12°C (54°F) during the day, peaking at 24°C (75°F). With 97 mm (3.8 in) of precipitation spread over 12 days and a humidity level of 73%, the month feels mild yet moderately damp. Conversely, January is considerably colder, with temperatures dropping to a minimum of -25°C (-13°F), averaging -3°C (27°F), and a maximum of 10°C (49°F). This winter month sees slightly higher precipitation at 127 mm (5.0 in) over 10 days and heightened humidity at 91%, which adds to the frostiness of the season. For more detailed insights on January weather, you can refer to Chamrousse weather in January.

In September, temperatures in Chamrousse range from a minimum of -6°C (21°F) to a maximum of 24°C (75°F), with an average of 12°C (54°F). The month sees about 97 mm (3.8 in) of precipitation spread over 12 days, accompanied by a moderate humidity level of 73%. In stark contrast, February is cooler with a minimum temperature of -17°C (2°F) and an average temperature of just 1°C (33°F), peaking at 15°C (60°F). Precipitation increases to 117 mm (4.6 in) over the same number of days, and humidity rises to 87%. For more details, check out Chamrousse weather in February.

In September, the weather in Chamrousse is relatively mild, with average temperatures ranging from a chilly 12°C (54°F) to a maximum of 24°C (75°F). Although it is generally more comfortable, the month still sees around 97 mm (3.8 in) of precipitation spread over 12 days, accompanied by a humidity level of 73%.

In contrast, March brings a much colder climate, with average temperatures dropping significantly to around 3°C (38°F) and a maximum of 17°C (64°F). This month also experiences higher precipitation levels of 155 mm (6.1 in) over 16 days, and humidity rises to 84%. For more detailed insights into the March conditions, check out Chamrousse weather in March.

In comparing the weather of September and April, we see significant differences in temperature and humidity. September tends to be milder, with average temperatures around 12°C (54°F) and maximums reaching 24°C (75°F), while April is cooler, averaging only 6°C (43°F) and peaking at 20°C (69°F). Both months receive a similar amount of precipitation, approximately 97 mm (3.8 in) in September and 99 mm (3.9 in) in April, with rain spread across about 12 days in each month. However, April tends to have slightly higher humidity at 83%, compared to September's 73%. For more details about the weather patterns in April, you can visit Chamrousse weather in April.

In comparing the weather of September and May, both months experience similar minimum temperatures, dipping to around -6°C (21°F to 22°F). However, September generally has a more moderate average temperature of 12°C (54°F) compared to May's cooler average of 10°C (50°F). Interestingly, while September can reach a maximum of 24°C (75°F), May enjoys slightly warmer maximums at 25°C (77°F). Precipitation distinguishes the two months significantly; September receives 97 mm (3.8 in) over 12 days, while May sees a much wetter climate with 212 mm (8.4 in) spread across 19 days. Humidity levels are comparable, with September at 73% and May slightly higher at 78%. For further details, you can check out Chamrousse weather in May.

When comparing the weather between September and June, notable differences emerge in temperature and precipitation. September experiences cooler temperatures, ranging from a minimum of -6°C (21°F) to a maximum of 24°C (75°F), with an average of 12°C (54°F). In contrast, June offers milder conditions, with temperatures spanning from a minimum of 3°C (37°F) to a maximum of 30°C (85°F) and an average of 15°C (59°F).

Precipitation is higher in June, totaling 173 mm (6.8 in) over 17 days, compared to September's 97 mm (3.8 in) over 12 days. Humidity levels remain relatively similar in both months, hovering around 73% in September and 75% in June. For a more detailed look at June weather, you can visit Chamrousse weather in June.

When comparing the weather in September and July, notable differences emerge in both temperature and precipitation. September typically sees cooler temperatures, with a minimum of -6°C (21°F) and an average of 12°C (54°F), peaking at 24°C (75°F). In contrast, July enjoys warmer conditions, with minimums around 5°C (42°F), averaging 16°C (62°F), and reaching a maximum of 30°C (86°F). Precipitation levels are slightly lower in September at 97 mm (3.8 in) over 12 days, compared to July’s 120 mm (4.7 in) across 14 days. Humidity levels remain similar in both months, with September at 73% and July at 72%. For a more detailed look at July weather specifics, visit Chamrousse weather in July.

In comparing the weather between September and August, September experiences cooler temperatures, with a minimum of -6°C (21°F), an average of 12°C (54°F), and a maximum of 24°C (75°F). In contrast, August is warmer, featuring a minimum of 4°C (40°F), an average of 16°C (61°F), and a higher maximum of 29°C (85°F). Precipitation levels are slightly lower in September at 97 mm (3.8 in) compared to August’s 125 mm (4.9 in), although both months experience precipitation on about 12 days. Additionally, September has higher humidity at 73%, while August’s humidity is more comfortable at 63%. For more details on August weather, check out Chamrousse weather in August.

In September, temperatures in Chamrousse range from a minimum of -6°C (21°F) to a maximum of 24°C (75°F), with an average temperature of 12°C (54°F). The month experiences around 97 mm (3.8 in) of precipitation spread over 12 days and a humidity level of 73%. In contrast, October sees a slight increase in humidity to 89%, with temperatures dropping slightly, averaging 8°C (47°F) and peaking at 21°C (70°F). Precipitation also rises to 124 mm (4.9 in), occurring over 11 days. For a detailed look at October's weather in Chamrousse, visit Chamrousse weather in October.

In September, the weather in Chamrousse generally showcases milder temperatures, with minimums around -6°C (21°F), average highs at 12°C (54°F), and maximums reaching up to 24°C (75°F). This month experiences about 97 mm (3.8 in) of precipitation over 12 days, coupled with a humidity level of 73%. In contrast, November sees a significant drop in temperatures, with minimums of -11°C (13°F) and an average of just 2°C (36°F). Although maximum temperatures can still reach 17°C (64°F), the month is wetter, accumulating 126 mm (5.0 in) of precipitation over 14 days, while humidity levels rise to 90%. For a detailed look into the November weather, check out Chamrousse weather in November.

In September, the weather in Chamrousse features milder temperatures, with a minimum of -6°C (21°F) and an average of 12°C (54°F), peaking at a pleasant 24°C (75°F). The month experiences 97 mm (3.8 in) of precipitation over 12 days, accompanied by a humidity level of 73%. In contrast, December brings much colder conditions, with temperatures dropping significantly; the minimum reaches -18°C (0°F), while the average settles at -1°C (30°F) and the maximum only reaches 11°C (51°F). This month is also wetter, with 247 mm (9.7 in) of precipitation across 18 days and increased humidity at 90%. For more detailed information about December weather specifics, you can refer to Chamrousse weather in December.

Compare Chamrousse's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Chamrousse

As summer gracefully transitions into autumn, September in Chamrousse showcases a distinct shift in weather patterns. With a notable drop in temperatures, the crisp air invites exploration of the stunning alpine landscape. Rain makes its presence felt with increased precipitation days, adding a refreshing vibrancy to the surroundings, while the higher humidity levels lend an authentic mountain feel. This month, unlike the warmer summer months, offers a unique blend of warmth during the day and cool evenings, perfect for enjoying the beauty of nature. For a deeper understanding of the seasonal variations, visit Chamrousse Climate.