Last updated: August 27, 2025
September in Basse-Nendaz, Switzerland showcases a beautiful transition into autumn, where temperatures range from a pleasant maximum of 23°C (73°F) to a brisk minimum of -6°C (22°F). The average temperature settles around a cool 10°C (50°F), creating a refreshing atmosphere. This month experiences 113 mm (4.5 in) of precipitation spread across 15 days, contributing to a notably high humidity level of 81%. These conditions create ideal opportunities for outdoor enthusiasts to explore the stunning alpine landscapes, with vibrant fall colors beginning to emerge.
In September, Basse-Nendaz, Switzerland, transitions gracefully from the warmth of summer to the crispness of autumn. With temperatures ranging from a chilly -6°C (22°F) at night to a pleasant 23°C (73°F) during the day, the month offers a remarkable contrast that beckons outdoor enthusiasts. The average temperature hovers around 10°C (50°F), signifying a gentle shift towards cooler days and crisp evenings. This gradual decline in temperature, compared to the summer highs, marks the start of a picturesque fall, where the vibrant colors of the landscape make every hike or stroll a visual delight. As the month progresses, residents and visitors alike can enjoy a balance of sunny days and cooler nights, setting the stage for the stunning alpine scenery to take center stage.
In September, Basse-Nendaz experiences a moderate precipitation total of 113 mm (4.5 in), spread over approximately 15 days of rain. This marks a notable decline from the significantly wetter months of May and June, which recorded 191 mm and 177 mm, respectively. Unlike the drier spring months, September’s rainfall hints at the onset of the autumn season, bridging the gap between late summer and the impending winter. The relatively consistent precipitation pattern suggests that locals can expect a balanced mix of wet and dry days, making it an ideal transition for outdoor enthusiasts seeking the vibrant fall foliage and the gentle chill of approaching winter in the Swiss Alps.
September in Basse-Nendaz, Switzerland, marks a subtle shift in humidity levels as the summer winds down. With an average humidity of 81%, September feels slightly drier compared to the preceding months of July and August, which enjoy lower averages of 82% and 77% respectively. This dip heralds the onset of autumn, yet it remains higher than the humidity levels recorded in May and June. The trend shows a transition towards the wetter months of autumn, as humidity starts to climb again in October and November, both reaching 89%. Thus, while September offers a brief reprieve, the region prepares for the cozy, moisture-laden months ahead.
As summer wanes in September, Basse-Nendaz experiences a noticeable shift in its UV Index, dropping to 7, categorized as high exposure. This marks a gradual decline from the peak summer months, where the UV Index soared to a maximum of 10 in both June and July. However, despite this decrease, outdoor enthusiasts should still be cautious, as the burn time is 25 minutes—a reminder that UV rays remain potent in early autumn. As the days shorten and the mountain air cools, it’s crucial to stay vigilant about sun protection while enjoying the beautiful fall scenery in the Swiss Alps. For more detailed information, visit Basse-Nendaz UV Index.
UV Risk Categories
September in Basse-Nendaz, Switzerland, offers a delightful blend of lingering summer warmth and the onset of autumn, boasting 325 hours of sunshine. Following the peak summer month of July, which shines with an impressive 416 hours, September still showcases a generous amount of sunlight, gradually tapering off as the days grow shorter. This month ranks above the earlier spring months, like March and April, demonstrating a notable transition from the vibrant long days of summer. As the golden hues of autumn paint the landscape, visitors can relish in the mild weather and scenic beauty, making September a truly enchanting time to explore the Alpine charm of Basse-Nendaz.
In Basse-Nendaz, Switzerland, the likelihood of sunny weather sees a notable fluctuation throughout the year. September, with a 33% chance of sunshine, falls slightly below the peak of spring and summer months but aligns closely with the trends seen in the preceding months of June and July. As the weather transitions into autumn, the sunny prospects slightly dip, yet remain consistent compared to August's 36%. Interestingly, this pattern indicates that while September may not guarantee endless sunshine, it offers a good opportunity for those looking to enjoy the gentle warmth and beauty of early autumn in the Alps. With a substantial 45% chance of sunshine in October, nature seems to reward those who linger a little longer in this beautiful region.
As summer transitions into autumn in Basse-Nendaz, Switzerland, September marks a gentle decline in daylight hours. With 12 hours of daylight, this month bridges the long, sunlit days of June and July—each boasting 15 hours—and the shorter days ahead. Following the peak of 14 hours in May and August, September offers a balanced mix of light and hint of the cozy fall evenings to come. The gradual decrease in daylight, leading from the vibrancy of summer towards the quieter winter months, underscores nature’s rhythm in this picturesque alpine region, making it a beautiful time for reflection and outdoor adventures.
As September rolls into Basse-Nendaz, Switzerland, the gentle caress of the wind is a soothing reminder that autumn is on the horizon. With an average wind speed of 1.0 m/s (2 mph), September continues the trend of mellow breezes established during the summer months. Following a slightly more animated summer, where August maintained the same light breeze, the transition into early fall feels serene and tranquil. This gentle wind speeds down from the higher summer averages, creating an inviting atmosphere perfect for enjoying the stunning alpine scenery without the distraction of harsher gusts. As the leaves begin to change, the calm breath of September seems to whisper tales of harvest and transition, making it a beautiful time to experience Basse-Nendaz’s enchanting landscapes.
Weather in Basse-Nendaz varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Basse-Nendaz, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather conditions. In September, temperatures range from a chilly -6°C (22°F) at night to a pleasant 23°C (73°F) during the day, with an average temperature of 10°C (50°F). The month experiences 113 mm (4.5 in) of precipitation over 15 days, and humidity is relatively high at 81%. In stark contrast, January sees much colder temperatures, with a minimum of -26°C (-15°F) and a maximum of just 8°C (46°F), resulting in an average of -8°C (18°F). Precipitation increases slightly to 140 mm (5.5 in), occurring over 10 days, and humidity rises to 91%. For a more detailed look at January weather, visit Basse-Nendaz weather in January.
September weather in Basse-Nendaz presents a much milder climate compared to February. With average temperatures around 10°C (50°F) and maximums reaching up to 23°C (73°F), September offers a pleasant transition from summer to autumn. In contrast, February sees much colder temperatures, with an average of -4°C (26°F) and maximums only hitting 12°C (55°F), making it one of the chillier months of the year. While both months experience similar precipitation levels—113 mm (4.5 in) in September and 108 mm (4.3 in) in February—the number of rainy days is slightly lower in February at 11 days, compared to 15 days in September. Additionally, February's humidity is notably higher at 89%, compared to September's 81%, contributing to a different feel in the cold winter air. For more details, you can explore Basse-Nendaz weather in February.
In September, temperatures range from a minimum of -6°C (22°F) to a maximum of 23°C (73°F), with an average of 10°C (50°F). The month experiences moderate precipitation at 113 mm (4.5 in) spread over 15 days and maintains a humidity level of 81%. In contrast, March is noticeably colder, with temperatures plunging to a minimum of -24°C (-11°F) and only reaching a maximum of 16°C (60°F), averaging around 0°C (31°F). While March has slightly higher precipitation at 135 mm (5.3 in) over the same number of days (15), humidity levels are slightly elevated at 87%. For more detailed information, you can check Basse-Nendaz weather in March.
When comparing the weather in September and April, significant differences emerge in both temperature and precipitation. In September, the temperatures range from a chilly -6°C (22°F) to a comfortable high of 23°C (73°F), with an average of 10°C (50°F). The month sees about 113 mm (4.5 inches) of precipitation over approximately 15 days and boasts a humidity level of 81%. Conversely, April presents cooler conditions, with temperatures dipping as low as -17°C (3°F) and peaking at 19°C (66°F), averaging around 4°C (39°F). April experiences slightly lower overall precipitation at 87 mm (3.4 inches) over about 12 days, with a humidity rate of 84%. For more detailed insights, you can explore Basse-Nendaz weather in April.
In comparing the weather between September and May, it's clear that both months exhibit a range of temperatures, but with some notable differences. September enjoys milder temperatures, with an average of 10°C (50°F) and a maximum reaching 23°C (73°F), whereas May presents cooler conditions with an average of 7°C (45°F) and a maximum of 24°C (75°F). Precipitation is more pronounced in May, totaling 191 mm (7.5 in) over 20 days, compared to September's 113 mm (4.5 in) over 15 days. Additionally, humidity levels are slightly higher in September at 81%, compared to May’s 80%. For more detailed information on May weather, you can visit Basse-Nendaz weather in May.
In comparing the weather of September and June, September experiences a slight chill, with average temperatures ranging from a low of -6°C (22°F) to a high of 23°C (73°F), while June offers warmer conditions, with temperatures between -3°C (27°F) and a maximum of 28°C (83°F). Both months are characterized by relatively high humidity levels, with September at 81% and June slightly higher at 82%. When it comes to precipitation, June sees more rainfall with 177 mm (7.0 in) over 18 days compared to September's 113 mm (4.5 in) across 15 days. For a closer look at June weather specifics, check out Basse-Nendaz weather in June.
When comparing the weather in September and July, several key differences emerge. September experiences cooler temperatures, with an average of 10°C (50°F) and a maximum of 23°C (73°F), while July is significantly warmer, averaging 14°C (58°F) and reaching up to 28°C (82°F). Precipitation levels are also notable; September sees 113 mm (4.5 in) of rain over 15 days, whereas July has heavier rainfall, totaling 182 mm (7.2 in) over 17 days. Humidity remains fairly consistent between the two months, with September at 81% and July slightly higher at 82%. For more information on the climate during this lively summer month, check out Basse-Nendaz weather in July.
In September, the weather in Basse-Nendaz is characterized by cooler temperatures, with a minimum of -6°C (22°F) and an average of 10°C (50°F), compared to August, which boasts a milder minimum of 2°C (36°F) and an average of 14°C (57°F). The maximum temperatures also drop from 27°C (80°F) in August to 23°C (73°F) in September. Additionally, September experiences slightly less precipitation, totaling 113 mm (4.5 in) over 15 days, whereas August sees 173 mm (6.8 in) over 17 days. Humidity remains relatively high in both months, with September at 81% and August at 77%. For more details on August weather, you can check Basse-Nendaz weather in August.
In September, the weather was generally milder with average temperatures around 10°C (50°F) and maximums reaching 23°C (73°F), while October brought a notable drop in average temperature to 6°C (43°F) with a maximum of 18°C (65°F). Both months experienced significant precipitation, with September receiving 113 mm (4.5 in) over 15 days, and October slightly higher at 131 mm (5.2 in) across 13 days. Humidity also increased in October, rising to 89% compared to September's 81%. For more details on October weather, you can check Basse-Nendaz weather in October.
September is characterized by a milder climate, with temperatures ranging from a minimum of -6°C (22°F) to a maximum of 23°C (73°F) and an average of 10°C (50°F). The month experiences significant precipitation, totaling 113 mm (4.5 in) over 15 days, accompanied by a humidity level of 81%. In contrast, November brings much colder conditions, with temperatures dipping to a chilly minimum of -20°C (-4°F) and an average temperature of -1°C (31°F), peaking at 16°C (61°F). The precipitation in November is slightly lower at 101 mm (4.0 in) across 13 days, while humidity rises to 89%. For more detailed information about the weather in November, you can visit Basse-Nendaz weather in November.
In September, the weather in Basse-Nendaz is marked by a mild average temperature of 10°C (50°F), with daily highs reaching up to 23°C (73°F) and lows dipping to -6°C (22°F). The month sees about 113 mm (4.5 in) of precipitation over 15 days and experiences relatively high humidity at 81%. In stark contrast, December brings a significant drop in temperatures, where the average plummets to -6°C (21°F) and nightly lows can reach a chilling -29°C (-21°F). Precipitation increases to 213 mm (8.4 in) over 16 days, with humidity rising slightly to 91%. For more details on the chilly conditions, visit Basse-Nendaz weather in December.
As summer gracefully fades, September in Basse-Nendaz presents a unique blend of warm days and crisp nights, setting it apart from the peak summer months. With a mix of vibrant autumn colors beginning to emerge, visitors can expect temperatures to range from mild to chilly, accompanied by increased chances of rain. The 81% humidity adds a refreshing quality to the air, making early morning walks invigorating. Although this month ushers in a noticeable shift towards cooler weather, the stunning landscapes and serene atmosphere create an enchanting backdrop for those looking to escape the summer crowds. For a deeper dive into what to expect throughout the year, explore the complete details at Basse-Nendaz Climate.