Last updated: August 27, 2025
September in Fiesch, Switzerland, showcases a captivating transition into autumn, with temperatures ranging from a comfortable 18°C (64°F) maximum to a chilling -10°C (14°F) minimum. The average hovers around a refreshing 6°C (42°F), offering a brisk backdrop for outdoor activities. This month sees 134 mm (5.3 in) of precipitation over 16 days, contributing to the lush, verdant landscapes for which the region is renowned. With humidity levels averaging 83%, visitors can expect a refreshing, albeit damp, atmosphere perfect for exploring the stunning natural beauty of the Alps.
In Fiesch, Switzerland, September marks the transition from summer's warmth to autumn's cool embrace. With temperatures ranging from a minimum of -10°C (14°F) to a maximum of 18°C (64°F), the month offers a refreshing average of 6°C (42°F). This is a noticeable shift from the more temperate late summer days, as days begin to shorten and crisp air signals the impending change of seasons. Travelers can expect a delightful mix of mild temperatures, making it ideal for outdoor activities like hiking, while also hinting at the snowy landscapes that will soon blanket the region. Enjoying the vibrant autumnal scenery becomes even more appealing as Fiesch embraces the chill of September.
In September, Fiesch experiences a noteworthy shift in precipitation, with an average of 134 mm (5.3 in) recorded over 16 days. This amount represents a drop from the summer peak in August, where rainfall reached its highest at 239 mm (9.4 in), but still showcases the region's characteristic wetness as it transitions into autumn. The decrease in both amount and rainy days suggests an easing of summer storms, hinting at the more stable weather patterns that often accompany the onset of fall. Interestingly, as autumn progresses into October, precipitation typically rebounds, indicating that the seasonal rhythm remains robust despite the September lull.
In September, Fiesch, Switzerland experiences a noticeable uptick in humidity, hovering around 83%. This reflects a slight increase from the drier summer months of July and August, which recorded humidity levels of 83% and 80%, respectively. As autumn approaches, humidity begins to rise again, aligning with the shift in seasons as the air transitions towards the wetter months of October and December, which peak at 90%. Overall, the monthly trend shows that while summer offers relatively lower humidity, the onset of fall brings a gradual increase, characteristic of the region’s alpine climate.
In September, Fiesch experiences a UV Index of 7, categorizing it as a high exposure period with a burn time of 25 minutes. This marks a noticeable decrease from the extreme levels often seen in the summer months, yet it still calls for vigilance. As the sun begins to soften, conditions remain favorable for outdoor activities, although it’s still essential to protect your skin from potential harm. Compared to the higher indices of July and August, September’s UV levels remind us that, even as autumn approaches, the sun can still deliver significant intensity. For those planning visits or outdoor adventures, awareness of the UV Index is crucial. For more information, visit Fiesch UV Index.
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September in Fiesch, Switzerland, offers a delightful balance of sun and early autumn ambiance, boasting 318 hours of sunshine. This marks a gentle decline from the peak summer months, where July enjoyed an impressive 415 hours of sunlight. As the season transitions, September retains a generous share of sunshine, showcasing a vibrant spectrum of colors in the surrounding landscapes. After the sun-drenched days of July and August, which saw 377 hours of radiant light, September's warmth lingers, inviting visitors to explore the scenic beauty of the Alps before the cooler months take hold. Overall, the trend reveals that while the days grow shorter as summer fades, Fiesch still basks in a satisfying glow, making it a charming destination for those looking to capture the essence of early autumn.
As summer fades and autumn approaches, September in Fiesch, Switzerland, presents a modest 18% chance of sunny weather. This trend marks a decline from the more reliable sunshine experienced in the late summer months of July (21%) and August (28%). Following the sun-kissed days of these months, September offers a transitional shift into the cooler fall season, reminiscent of the slightly brighter spring months, with their peak probabilities hovering around 35%. As the weather ebbs and flows, visitors to Fiesch can expect a mix of cloud and sun, making it a season ripe for enjoying the crisp mountain air and stunning autumn scenery.
As summer transitions into autumn, September in Fiesch, Switzerland, offers a gentle reduction in daylight, providing approximately 12 hours of sun each day. This marks a notable shift from the height of summer, where daylight peaked at 15 hours in June and July, creating an almost oceanic quality to the long, sun-soaked days. With daylight gradually waning, September invites a cozy embrace of the impending fall, as evenings become longer and the golden hues of nature start to paint the landscape. Following the vibrant bursts of summer, this month's daylight serves as a soft reminder of nature's rhythm, leading us gently toward the chill of October, which will bring even shorter days.
As summer transitions to fall in Fiesch, Switzerland, September brings a gentle calm to the region, with an average wind speed dipping to 1.0 m/s (2 mph). This marks the lowest point of the year, reflecting a shift from the slightly more breezy summer months. The preceding months have seen consistent wind speeds around 1.3 to 1.5 m/s (3 mph), yet September's tranquil breezes create a serene atmosphere, perfect for enjoying the stunning alpine views. As the season progresses, wind speeds pick up again in October and December, suggesting a return to the more invigorating gusts of winter. Overall, September serves as a bridge between the vibrant energies of summer and the crispness of the chilly season ahead.
Weather in Fiesch varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fiesch, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a chilly -10°C (14°F) at night to a comfortable 18°C (64°F) during the day, with an average of 6°C (42°F). The month sees about 134 mm (5.3 in) of precipitation over 16 days and maintains a humidity level of 83%. In contrast, January is considerably colder, featuring minimum temperatures plummeting to -24°C (-10°F) and a maximum of just 4°C (39°F), with an average temperature of -10°C (14°F). Precipitation slightly increases to 155 mm (6.1 in) over 12 days, and humidity rises to 92%. For more detailed information, visit Fiesch weather in January.
In comparing the weather conditions of September and February, significant differences emerge. September enjoys a milder average temperature of 6°C (42°F), with maximums reaching up to 18°C (64°F), making it more pleasant overall. In contrast, February is much colder, with an average temperature of -8°C (19°F) and a maximum of only 6°C (43°F), plunging to a minimum of -25°C (-13°F).
Precipitation levels are slightly higher in September, with 134 mm (5.3 in) falling over 16 days, compared to February’s 100 mm (4.0 in) over just 13 days. The humidity also remains high during both months, peaking at 89% in February, compared to 83% in September. For those interested in the specifics of February weather, you can find more details in this link: Fiesch weather in February.
When comparing the weather in September and March, notable differences emerge in temperature and overall climate. September enjoys a milder range, with minimum temperatures around -10°C (14°F) and an average of 6°C (42°F), peaking at a comfortable 18°C (64°F). This month sees approximately 134 mm (5.3 in) of precipitation over 16 days, coupled with a humidity level of 83%. In contrast, March is much colder, where temperatures can drop to as low as -25°C (-13°F), with an average of -6°C (22°F) and a maximum of only 8°C (47°F). The precipitation is slightly higher at 138 mm (5.4 in) across 15 days, with humidity reaching 87%. For more detailed insights, you can check Fiesch weather in March.
In September, temperatures experience a pleasant range with minimums around -10°C (14°F) and averages of 6°C (42°F), peaking at a comfortable 18°C (64°F). In contrast, April is much colder, with minimum temperatures dropping to -18°C (-1°F) and an average of -2°C (29°F), only reaching up to 10°C (50°F). While both months have a significant amount of precipitation, September sees a bit more at 134 mm (5.3 in) over 16 days compared to April's 118 mm (4.6 in) over 13 days. Humidity levels are relatively similar, with September at 83% and April slightly higher at 84%. For more detailed information, check out Fiesch weather in April.
In comparing the weather between September and May, we can see distinct differences. September offers a wider range of temperatures, with a minimum of -10°C (14°F), an average of 6°C (42°F), and a maximum of 18°C (64°F). In contrast, May presents slightly cooler conditions, featuring a minimum of -11°C (13°F), an average of 2°C (36°F), and a maximum of 15°C (59°F).
Additionally, precipitation levels are notably higher in May, totaling 160 mm (6.3 in) spread over 20 days, compared to September’s 134 mm (5.3 in) over 16 days. Humidity levels are relatively similar, with September at 83% and May at 80%. For more insights on May weather, you can check Fiesch weather in May.
In September, temperatures tend to be cooler, with minimums reaching -10°C (14°F) and averages around 6°C (42°F), while maximums can go up to 18°C (64°F). The month experiences significant precipitation, totaling 134 mm (5.3 in) over 16 days, coupled with an average humidity of 83%. In contrast, June offers milder temperatures, featuring minimums of -4°C (26°F), average highs of 8°C (46°F), and maximums soaring to 25°C (76°F). This month sees a higher total precipitation of 201 mm (7.9 in) spread over 19 days, while maintaining similar humidity levels at 82%. For a detailed look at June weather patterns, check out Fiesch weather in June.
In comparing the weather between September and July, we see a notable shift in temperatures and precipitation patterns. September experiences cooler temperatures with a minimum of -10°C (14°F), an average of 6°C (42°F), and a maximum of 18°C (64°F), while July offers milder weather with a minimum of -1°C (31°F), an average of 10°C (50°F), and a maximum of 22°C (73°F). Additionally, July tends to be wetter, receiving 223 mm (8.8 in) of precipitation over 23 days compared to September's 134 mm (5.3 in) over 16 days. Interestingly, both months have the same humidity level of 83%. For a closer look at July's conditions, you can check out Fiesch weather in July.
In comparing the weather of September and August, September tends to be cooler, with average temperatures ranging from a minimum of -10°C (14°F) to a maximum of 18°C (64°F), while August sees milder conditions with temperatures between -1°C (30°F) and 20°C (69°F). Precipitation levels also differ significantly; September experiences 134 mm (5.3 in) over 16 days, while August has a higher total of 239 mm (9.4 in) spread across 21 days. Humidity is slightly higher in September at 83%, compared to 80% in August. For more details about August weather specifically, check this link: Fiesch weather in August.
September sees milder temperatures with a minimum of -10°C (14°F) and an average of 6°C (42°F), peaking at 18°C (64°F). The month is relatively wet, with 134 mm (5.3 in) of precipitation over 16 days and humidity levels at 83%. In contrast, October brings colder temperatures, with a minimum of -13°C (9°F), an average dipping to 1°C (34°F), and a maximum of 13°C (55°F). This month also experiences more rainfall, totaling 213 mm (8.4 in) spread across 14 days, along with higher humidity at 90%. For specific details on October weather patterns, you can check out Fiesch weather in October.
September and November exhibit notable contrasts in weather conditions. In September, temperatures range significantly from a chilly -10°C (14°F) to a mild max of 18°C (64°F), with an average of 6°C (42°F). The month sees 134 mm (5.3 in) of precipitation over 16 days and maintains a humidity level of 83%. In comparison, November brings colder temperatures, with a minimum of -21°C (-6°F) and an average of -5°C (24°F), while the maximum temperature peaks at 9°C (48°F). Precipitation increases slightly to 137 mm (5.4 in) over the same 16 days, and humidity rises to 88%. For more detailed information, check out Fiesch weather in November.
In September, the weather tends to be relatively mild, with average temperatures ranging from a minimum of -10°C (14°F) to a maximum of 18°C (64°F), and a general average of 6°C (42°F). The month experiences significant precipitation, totaling 134 mm (5.3 in) over about 16 days, accompanied by a humidity level of 83%.
Conversely, December brings much colder conditions, with temperatures plummeting to a minimum of -22°C (-8°F) and an average temperature of -9°C (17°F). The maximum temperature hovers around 3°C (37°F). Precipitation increases to 212 mm (8.3 in) across approximately 19 days, and humidity rises slightly to 90%. The stark difference in weather highlights the transition from the relatively mild days of September to the frigid depths of December. For more insights, visit Fiesch weather in December.
As September rolls in, Fiesch experiences a distinct shift in weather compared to the summer months. With temperatures gradually dipping, the cool air brings a refreshing contrast to the lingering warmth of late summer. Humidity remains relatively high, contributing to the ambiance of the season. September is also marked by increased precipitation, with several days of rain, making it one of the wetter months of the year. This blend of cooler temperatures and frequent rainfall not only sets the stage for a vibrant transition into autumn but also enhances the lush landscapes that surround Fiesch. For a more detailed outlook on what to expect throughout the year, check out Fiesch Climate.