Last updated: February 26, 2025
In Mont-de-Lans, France, September unveils a unique blend of autumnal charm and crisp mountain air. The maximum temperature reaches a pleasant 20°C (68°F), while the average dips to a cool 9°C (48°F), and a brisk minimum of -13°C (9°F) may surprise visitors. This month sees 82 mm (3.2 in) of precipitation spread over approximately 14 days, contributing to the lush scenery. With a humidity level of 73%, the landscape remains vibrantly alive, inviting outdoor enthusiasts to explore its stunning trails and breathtaking vistas. September is truly a captivating time to experience the allure of Mont-de-Lans.
In Mont-de-Lans, France, September ushers in a distinct change in temperatures as summer gives way to autumn. With minimums dropping to -13°C (9°F) and average daytime temperatures hovering around 9°C (48°F), the crisp air sets the tone for the season. The maximum temperatures can still reach a pleasant 20°C (68°F), offering the last vestiges of warmth before winter approaches. This month showcases a noticeable transition from the mild warmth of August, with its pleasant averages of 13°C (55°F), to the chillier embrace of October. As nature prepares for the colder months, visitors can enjoy the beauty of the changing landscape amidst these engaging temperature shifts.
In September, Mont-de-Lans experiences a notable shift in precipitation patterns, receiving 82 mm (3.2 in) of rain over approximately 14 days. This amount marks a decline from the wetter summer months, with August having recorded 110 mm (4.3 in). The decrease in rainfall signals the transition into autumn, characterized by fewer precipitation days and a gradual drop in moisture levels. As the landscapes begin to shift towards vibrant fall hues, the slightly drier September suggests a calming before the heavier rains of October, which typically bring an average of 111 mm (4.4 in). Overall, the month of September acts as a gentle bridge between the lush summer and the crisp, wet autumn in Mont-de-Lans.
September in Mont-de-Lans marks a subtle shift in the air, as humidity levels take a slight rise to 73% after the summer's 63% low in August. This increase hints at the impending change of seasons, blending the residual warmth of summer with the crispness of autumn. Throughout the year, humidity generally declines from January's peak of 91%, but September’s levels remind us that while summer may be waning, the atmospheric moisture is still a notable presence. As the months progress towards October, a significant jump to 89% signifies the return of the wetter weather, closing the seasonal circle with a reminder of winter's approach.
As September settles in Mont-de-Lans, France, the UV Index remains notably high at 8, classifying it within the very high exposure category. This marks a slight decrease from the peak UV Index of 11 experienced in June, yet still necessitates caution, with a burn time of just 15 minutes for unprotected skin. The summer months have shown a pattern of extreme UV exposure, particularly in June and July, before tapering off slightly in September. As autumn approaches, the UV Index gradually declines, but the sun’s intensity during this time can still be significant, making protective measures essential for both locals and visitors. For more details on UV conditions, check the Mont-de-Lans UV Index.
UV Risk Categories
As summer gradually winds down, September in Mont-de-Lans still basks in a generous 337 hours of sunshine, continuing the warm glow from the sizzling peak of July and slightly trailing off from the vibrant light of August. This month marks a subtle transition, as daylight begins to dim in the face of the approaching autumn, yet it remains significantly brighter than the depths of winter, with October's figure dropping to 294 hours. The overall trend throughout the year is clear: sunshine hours peak in the heart of summer, but September's lingering warmth is a perfect invitation for those who cherish the outdoors, making it an ideal time for delightful hikes and scenic vistas amidst the backdrop of nature's shifting palette.
In September, Mont-de-Lans enjoys a 30% chance of sunny weather, which reflects a slight decline following the summer highs. While August peaks with a 49% likelihood of sunshine, September marks a transition toward autumn, as daylight wanes and temperatures cool. Interestingly, this chance of sun aligns closely with the spring months of April and May, suggesting a seasonal shift rather than erratic weather patterns. Overall, while visitors can still expect some beautiful days, the changing season may bring more variability in sunshine as the month progresses.
As summer wanes in September, Mont-de-Lans experiences a gentle shift in daylight, with approximately 12 hours of sunlight gracing the days. This marks a notable decline from the longer days of July and June, which basked in up to 15 hours of daylight. The transition from summer to autumn is palpable, as August also begins to show signs of diminishing light, dropping to 13 hours. Looking ahead, the days will continue to shorten, dwindling to 10 hours by October, as the region embraces the cozy ambiance of fall. The gradual reduction in daylight from the peak summer months underscores the rhythm of the seasons in this beautiful alpine setting, inviting locals and visitors alike to savor the crispness of early autumn.
As September unfolds in Mont-de-Lans, France, the gentle embrace of the September wind reveals a subtle trend in the region's atmospheric rhythm. With an average wind speed dropping to 1.3 m/s (3 mph), this month matches the quieter breezes of January and December, hinting at a tranquil transition from summer to autumn. The wind's consistency, remaining largely within the 3 mph range from June through October, fosters a serene atmosphere where the crispness of impending fall mingles with the lingering warmth of summer. While the winds of the earlier months blew a tad stronger, September's calming gusts beckon residents and visitors alike to enjoy the beauty of nature undisturbed.
The weather in Mont-de-Lans 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 Mont-de-Lans and find detailed weather information for every month.
September and January present stark contrasts in weather. In September, temperatures range from a chilly -13°C (9°F) at night to a mild 20°C (68°F) during the day, with an average temperature of 9°C (48°F). The month sees 82 mm (3.2 in) of precipitation spread over 14 days, combined with a humidity level of 73%. In comparison, January is significantly colder, with temperatures plummeting to a minimum of -26°C (-14°F) and a maximum of only 6°C (43°F), resulting in an average of -8°C (18°F). Precipitation increases to 107 mm (4.2 in) over just 10 days, while humidity rises to a notable 91%. For more detailed insights, check out Mont-de-Lans weather in January.
September and February present notable contrasts in weather conditions. In September, temperatures range from a chilly -13°C (9°F) to a comfortable maximum of 20°C (68°F), with an average temperature of 9°C (48°F). The month sees around 82 mm (3.2 in) of precipitation over 14 days, accompanied by a humidity level of 73%. In contrast, February experiences cooler temperatures, with lows reaching -20°C (-4°F) and a maximum of 9°C (49°F), averaging at -4°C (25°F). The month records slightly higher precipitation at 92 mm (3.6 in) across 11 days, but it also has a higher humidity level of 87%. For more details on February weather, check out this link: Mont-de-Lans weather in February.
In September, the weather is generally milder with temperatures ranging from a minimum of -13°C (9°F) to a maximum of 20°C (68°F), averaging around 9°C (48°F). The month experiences 82 mm (3.2 in) of precipitation over 14 days and maintains a humidity level of 73%. In contrast, March is significantly colder, with temperatures dipping to a minimum of -22°C (-8°F) and reaching a maximum of 11°C (52°F), averaging at -2°C (28°F). March also sees increased precipitation at 132 mm (5.2 in), spread over the same 14 days, but with slightly higher humidity at 84%. For more details on the March climate in this region, check out Mont-de-Lans weather in March.
When comparing the weather in September and April, the differences in temperature and humidity are quite notable. September typically experiences milder conditions, with average temperatures around 9°C (48°F), while April's average dips to just 1°C (34°F). Notably, September can reach a maximum of 20°C (68°F), starkly contrasting with April's 14°C (57°F) high. Both months see a similar amount of precipitation, with September recording 82 mm (3.2 in) over 14 days and April slightly higher at 84 mm (3.3 in) over 11 days; however, April is marked by slightly higher humidity, at 83% compared to September’s 73%. For more specific details about April weather patterns, you can check Mont-de-Lans weather in April.
When comparing the weather in September and May, it is evident that both months experience mild temperatures, with highs reaching around 20°C (68°F). However, September boasts a slightly warmer average temperature of 9°C (48°F) compared to May's average of 5°C (41°F). In terms of precipitation, May is significantly wetter, receiving 166 mm (6.6 in) over 20 days, while September has 82 mm (3.2 in) across 14 days. Additionally, humidity levels are a bit higher in May at 78%, compared to September's 73%. For more details, you can check the Mont-de-Lans weather in May.
When comparing the weather in September and June, notable differences emerge. September experiences a broader temperature range, with minimums dipping to -13°C (9°F) and maximums reaching 20°C (68°F), while June boasts milder temperatures, ranging from a minimum of -2°C (29°F) to a maximum of 25°C (78°F). Precipitation is higher in June, with 133 mm (5.2 in) over 18 days compared to September's 82 mm (3.2 in) across 14 days. Humidity levels remain similar, with September at 73% and June slightly higher at 75%. For more detailed insight into the June weather conditions, you can check Mont-de-Lans weather in June.
In comparing the weather of September and July, we see notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums dropping to -13°C (9°F) and maximums reaching 20°C (68°F), while the average temperature is around 9°C (48°F). In contrast, July boasts milder temperatures, with minimal readings at 1°C (35°F) and maximums peaking at 25°C (78°F), leading to an average temperature of 13°C (55°F). Precipitation is also more pronounced in July, with 107 mm (4.2 in) over 16 days compared to September's 82 mm (3.2 in) over 14 days. Despite the slight variation in humidity—73% in September and 72% in July—the overall climate feels distinctly different, leaning towards cooler and wetter conditions in September. For more details on July weather specifically, you can check Mont-de-Lans weather in July.
In comparing the weather between August and September, it’s clear that September experiences cooler temperatures, with an average of 9°C (48°F) compared to August's warmer 13°C (55°F). The maximum temperature in September reaches 20°C (68°F), while in August, it peaks at 24°C (75°F). Additionally, September sees slightly less precipitation, with 82 mm (3.2 in) compared to 110 mm (4.3 in) in August, though both months have the same number of rainy days at 14. Humidity levels are also higher in September at 73%, compared to 63% in August. For more details on August weather specifically, you can visit Mont-de-Lans weather in August.
In comparing the weather between September and October, we notice a notable shift in temperatures and humidity levels. September starts off with a minimum temperature of -13°C (9°F) and an average of 9°C (48°F), peaking at a maximum of 20°C (68°F). It experiences a total precipitation of 82 mm (3.2 in) over 14 days, with a humidity level sitting at 73%. In contrast, October sees a warmer minimum of -9°C (15°F) and a drop in average temperature to 5°C (40°F), with a maximum of 16°C (62°F). This month also brings increased precipitation, totaling 111 mm (4.4 in) over 11 days, and higher humidity at 89%. For those interested in detailed October conditions, you can check out Mont-de-Lans weather in October.
September and November showcase a significant shift in weather patterns. In September, temperatures range from a minimum of -13°C (9°F) to a maximum of 20°C (68°F), with an average of 9°C (48°F). The month experiences moderate precipitation of 82 mm (3.2 in) over 14 days, accompanied by a humidity level of 73%. In contrast, November brings colder temperatures, with a minimum of -22°C (-7°F) and a maximum of 12°C (54°F), averaging -2°C (28°F). This month sees increased precipitation of 113 mm (4.5 in) across 13 days, and humidity rises to 90%, indicating a wetter and chillier atmosphere. For more details on the weather conditions during this month, you can visit Mont-de-Lans weather in November.
September and December exhibit stark contrasts in weather conditions. In September, temperatures range from a chilly -13°C (9°F) at minimum to a pleasant 20°C (68°F) at maximum, with an average of 9°C (48°F). The month sees about 82 mm of precipitation over 14 days and a humidity level of 73%. In contrast, December is significantly colder, with temperatures dropping to a minimum of -23°C (-8°F) and peaking at just 5°C (41°F), resulting in an average of -6°C (22°F). December also experiences higher precipitation at 218 mm over 18 days, along with increased humidity at 90%. This notable difference highlights the transition from early autumn to the heart of winter. For more detailed information, you can check the full weather conditions here: Mont-de-Lans weather in December.
As September rolls in, Mont-de-Lans transitions dramatically from the warmth of summer to the crispness of autumn. With average temperatures hovering around a cool 9°C (48°F), the month offers a refreshing respite, though it can occasionally dip to a chilly -13°C (9°F). This change is accompanied by increased precipitation, with about 14 days seeing some rainfall, totaling around 82 mm (3.2 in) throughout the month. Humidity also rises to 73%, contributing to the season's fresh, invigorating atmosphere. For a deeper look at how September sets the stage for the changing seasons, check out Mont-de-Lans Climate.