Last updated: February 26, 2025
Experience the charm of Le Grand-Bornand in September, where crisp mountain air meets scenic beauty. With daytime maximum temperatures reaching a pleasant 24°C (76°F) and a refreshing average of 12°C (54°F), outdoor adventures await. As nights cool down to a minimum of -3°C (28°F), cozy evenings come alive. September also brings 94 mm (3.7 in) of precipitation over 13 days, enriching the lush landscapes, while the humidity hovers around 73%, adding to the enchanting atmosphere. Embrace the transition into autumn with stunning vistas and unforgettable experiences!
As September sets in, Le Grand-Bornand transitions into a phase of crisp air and vibrant colors, with temperatures ranging from a chilly -3°C (28°F) at night to a pleasant daytime high of 24°C (76°F). This month marks a noticeable shift from the summer warmth, with the average temperature settling at 12°C (54°F), creating the perfect backdrop for outdoor adventures amidst the stunning alpine landscape. Although the temperatures begin to dip as autumn approaches, the mild conditions invite hikers and nature enthusiasts to enjoy the breathtaking scenery before the chill of winter sets in. The gentle decline in warmth offers a refreshing change, making September a delightful time to explore the natural beauty and rich culture of this charming French village.
In September, Le Grand-Bornand experiences a transition in its climate, with precipitation dropping to 94 mm (3.7 in) over about 13 days of rainfall. This marks a notable decrease from the summer months, where May and June saw significantly higher totals of 213 mm (8.4 in) and 174 mm (6.9 in), respectively. The shift indicates a gradual waning of summer storms, with September's rainfall providing a gentle lead-in to the autumnal season. Interestingly, this month is also the beginning of the downward trend in precipitation, as October and November typically resume a slightly wetter pattern with 122 mm (4.8 in) and 116 mm (4.6 in), respectively. Thus, September serves as a crucial transition period, balancing moderation in rain while hinting at the wetter months ahead.
In Le Grand-Bornand, France, September marks a transitional moment in the year's humidity cycle, where the lingering warmth of summer begins to give way to the crispness of autumn. With a humidity level of 73%, September is noticeably drier than the preceding months of July and August, where humidity plunged to 72% and 63%, respectively. This slight increase from August suggests a gradual return to the moisture levels typical of the earlier spring and summer, but it still remains comfortably below the higher readings of 90% seen in late autumn and winter. Overall, the trend through the months reflects a resilient summer followed by the onset of autumn, with September serving as a gentle bridge between the two seasons.
As summer transitions to autumn in Le Grand-Bornand, September maintains a high UV Index of 7, indicating that sun protection is still essential for outdoor activities. While the intense summer rays peak in June and July with a UV Index of 10, September's value reflects a downward trend, allowing for somewhat longer burn times of 25 minutes. This shift signals a welcome change for those seeking to enjoy the stunning alpine scenery without the most extreme sun exposure. As the days shorten and temperatures cool, it's crucial to stay vigilant about sun safety in the fall months. For detailed insights on UV levels throughout the year, visit Le Grand-Bornand UV Index.
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As summer transitions to fall, September in Le Grand-Bornand brings a delightful balance of warmth and sunshine, offering 329 hours of radiant light. This month sees a gradual decline from the peak sunshine of July with 418 hours, yet still boasts significantly more sun than the colder months ahead. Comparatively, September retains a vibrant glow, surpassing the earlier part of the year, where winter months like January with just 165 hours pale in contrast. The steady decrease in sunshine hours throughout the autumn months indicates that while the days may grow shorter, the lingering summer vibe makes September a perfect time for both adventure and relaxation in this picturesque French village.
In Le Grand-Bornand, the likelihood of sunny weather in September stands at 37%, positioning it as an average month for sun compared to the overall yearly trend. The sunniest periods occur earlier in the year, particularly in March at 50% and April at nearly the same, but following these peaks, the chance of sunshine tends to dip. As summer transitions into fall, the probabilities for sun remain relatively stable, with August trailing closely at 45% and October showing an increase to 48%. Thus, while September offers moderate chances for sunny days, it is clear that the momentum for brighter weather shifts as the seasons change, setting the stage for the crisp beauty of autumn.
As summer transitions into autumn, September in Le Grand-Bornand, France, offers a delightful blend of lingering warmth and the gradual retreat of daylight. With approximately 12 hours of daylight, the days are still pleasantly long, though slightly shorter than the height of summer, when they peaked at 15 hours in June and July. Following the vibrant days of August, the diminishing light heralds the onset of fall, preparing the landscape for the enchanting hues of autumn. This shift in daylight duration not only accentuates the beauty of the mountains but also invites visitors to enjoy outdoor adventures before the days draw colder and darker in October. As the year winds down, the rhythmic ebb and flow of daylight through the seasons serves as a reminder of nature's serene yet dynamic cycles.
In Le Grand-Bornand, September brings a gentle breeze as the average wind speed drops to 1.1 m/s (3 mph), marking the calmest month of the year. This subtle shift highlights the transition from the vibrant summer months, where wind speeds hover between 1.2 m/s and 1.4 m/s, to the crisper autumn days ahead. The lower wind speeds in September set a serene backdrop, inviting visitors to embrace the beauty of the surrounding landscape as the leaves begin to change. As the seasons shift, you can feel the idyllic charm of this Alpine paradise, offering a quiet reprieve before the winter winds begin to howl in October, where speeds bounce back to 1.5 m/s.
The weather in Le Grand-Bornand 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 Le Grand-Bornand and find detailed weather information for every month.
September weather in Le Grand-Bornand features a broad temperature range, with minimums around -3°C (28°F) and maximums reaching up to 24°C (76°F), making it a much milder month with an average of 12°C (54°F). Despite being relatively warm, September also experiences substantial humidity at 73% and receives rainfall over approximately 13 days, totaling 94 mm (3.7 in).
In contrast, January brings much cooler conditions, characterized by frigid minimum temperatures of -22°C (-8°F) and a maximum of just 8°C (47°F), resulting in an average temperature of -4°C (26°F). The month is also wetter, with precipitation measuring 138 mm (5.4 in) over 10 days, alongside higher humidity at 91%. The stark difference in temperatures and precipitation patterns highlights the seasonal shift from the gentle warmth of September to the biting cold of January. For more details on January's conditions, visit Le Grand-Bornand weather in January.
In comparing the weather between September and February, a notable difference is observed in temperatures. September boasts a milder climate with average temperatures around 12°C (54°F) and highs reaching 24°C (76°F), while February experiences much colder conditions, with average temperatures at freezing (0°C or 32°F) and lows plunging to -18°C (0°F). Additionally, February is characterized by higher humidity levels at 87%, compared to September's 73%. Precipitation is also higher in February, totaling 121 mm (4.7 in) over 11 days, as opposed to September's 94 mm (3.7 in) spread across 13 days. For more insights into February weather, you can visit Le Grand-Bornand weather in February.
In comparing the weather of September and March, it's evident that March is colder, with average temperatures peaking at only 2°C (37°F) compared to September's warmer average of 12°C (54°F). March experiences even lower minimum temperatures, dipping to -20°C (-4°F), while September’s minimum is a milder -3°C (28°F). Precipitation is more prevalent in March, accumulating 157 mm (6.2 in) over 15 days, in contrast to September's 94 mm (3.7 in) across 13 days. Additionally, March tends to have higher humidity at 84%, compared to September's 73%. For a closer look at the specific conditions during March, you can check out Le Grand-Bornand weather in March.
September and April offer distinct weather experiences. In September, temperatures range from a chilly minimum of -3°C (28°F) to a pleasant average of 12°C (54°F) and can reach a maximum of 24°C (76°F), with humidity at 73%. The month sees moderate rainfall, totaling 94 mm (3.7 in) over about 13 days. In contrast, April presents cooler temperatures, starting at a minimum of -12°C (10°F), averaging 6°C (44°F), and peaking at 21°C (71°F). Although it has slightly less precipitation at 84 mm (3.3 in) across 12 days, humidity is higher at 83%. For more detailed insights, you can check the weather conditions of this beautiful location in April: Le Grand-Bornand weather in April.
September and May exhibit distinct weather characteristics, reflecting the transition between seasons. In September, temperatures range from a minimum of -3°C (28°F) to a maximum of 24°C (76°F), with an average of 12°C (54°F). The month sees moderate precipitation at 94 mm (3.7 in) over approximately 13 days, accompanied by a humidity level of 73%. Conversely, May presents slightly cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 26°C (80°F), averaging 10°C (50°F). However, May experiences considerably higher rainfall, totaling 213 mm (8.4 in) over 21 days and a humidity of 78%. This stark difference in precipitation and temperature highlights the varying climatic conditions as the year progresses. For a closer look at May weather specifics, check out Le Grand-Bornand weather in May.
When comparing the weather in September to that of June, one can observe distinct differences in temperature and precipitation. September experiences a milder temperature range, with a minimum of -3°C (28°F) and an average of 12°C (54°F), peaking at 24°C (76°F). In contrast, June boasts warmer temperatures, starting at a minimum of 2°C (36°F), averaging 15°C (59°F), and reaching a high of 31°C (87°F). Additionally, June sees more rainfall, with a total of 174 mm (6.9 in) across 17 days, compared to September's 94 mm (3.7 in) over 13 days. Humidity levels remain similar in both months, at 73% in September and slightly higher at 75% in June. For a more detailed look at June's climate, check out Le Grand-Bornand weather in June.
In comparing the weather between July and September, we observe notable differences in temperature and precipitation. July experiences a milder minimum temperature of 5°C (41°F) and a maximum of 31°C (88°F), with an average of 16°C (62°F), making it significantly warmer than September, which sees a sharp drop with a minimum of -3°C (28°F) and an average of 12°C (54°F). Precipitation levels are also higher in July, totaling 133 mm (5.3 in) over 16 days, compared to September's 94 mm (3.7 in) across 13 days. Humidity remains consistent between the two months, hovering around 72-73%. For a detailed look at July’s weather, visit Le Grand-Bornand weather in July.
In comparing the weather between August and September, we see a notable shift in temperatures and precipitation patterns. August typically experiences milder temperatures, with a minimum of 4°C (39°F) and an average of 16°C (61°F), peaking at 29°C (84°F). In contrast, September brings cooler conditions, with a minimum of -3°C (28°F) and an average of 12°C (54°F), reaching a maximum of 24°C (76°F). Both months receive rainfall on 13 days, but September sees a decrease in total precipitation to 94 mm (3.7 in) compared to August's 134 mm (5.3 in). Additionally, humidity levels are higher in September at 73%, compared to 63% in August. For more detailed insights on August weather, you can visit Le Grand-Bornand weather in August.
In comparing the weather between September and October, we observe a general cooling trend as temperatures drop, with September averaging 12°C (54°F) compared to October's average of 8°C (46°F). The maximum temperature in September reaches up to 24°C (76°F), while October sees a milder max of 21°C (70°F). Additionally, October experiences slightly more precipitation at 122 mm (4.8 in), compared to September's 94 mm (3.7 in), although it has fewer rainy days, with rainfall occurring on 11 days in October versus 13 in September. Humidity also increases from 73% in September to 89% in October, contributing to a more pronounced chill in the air. For more detailed insights, check out Le Grand-Bornand weather in October.
In September, the weather is relatively mild, featuring a temperature range from a minimum of -3°C (28°F) to a maximum of 24°C (76°F), with an average temperature of 12°C (54°F). The month experiences about 94 mm (3.7 in) of precipitation over 13 days and maintains a humidity level around 73%. By contrast, November brings much colder temperatures, with a minimum of -12°C (10°F), an average of 2°C (36°F), and a maximum of 18°C (64°F). Additionally, November sees an increase in precipitation to 116 mm (4.6 in) over 12 days, along with higher humidity at 90%. For those interested in exploring more about the climate specifics of this month, check out Le Grand-Bornand weather in November.
In September, the weather is mild, with temperatures ranging from a minimum of -3°C (28°F) to a maximum of 24°C (76°F) and an average of 12°C (54°F). The month experiences moderate precipitation at 94 mm (3.7 in) over 13 days, with a humidity level of 73%. In contrast, December brings much colder conditions, with temperatures dipping as low as -19°C (-2°F) and averaging -2°C (29°F), peaking at a maximum of 10°C (51°F). Precipitation increases significantly to 250 mm (9.9 in) over 18 days, accompanied by higher humidity at 90%. For more detailed information about the December climate in Le Grand-Bornand, check out Le Grand-Bornand weather in December.
As September unfolds in Le Grand-Bornand, the weather exhibits a noticeable transition towards autumn, crafting a unique experience distinct from the summer months. With an average temperature that dips to a comfortable 12°C (54°F), the warmth of late summer gives way to cooler evenings, where nighttime temperatures can plummet to -3°C (28°F). Precipitation increases, with the region seeing about 94 mm of rain over 13 days, often enveloping the landscape in a refreshing mist that highlights the area’s natural beauty. The humidity level remains relatively high at 73%, adding a crispness to the air that invigorates the senses. For detailed insights into the evolving climate, explore Le Grand-Bornand Climate.