Last updated: August 27, 2025
September in Airolo, Switzerland, presents a dynamic weather profile characterized by a maximum temperature reaching 18°C (65°F), while averaging around 7°C (44°F). With minimum temperatures plummeting to -11°C (13°F), this month marks the transition into autumn's embrace. Rainfall is notable, accumulating to 146 mm (5.7 in) over 16 days, contributing to the region's lush greenery. Additionally, high humidity levels at 83% create a crisp atmosphere, perfect for enjoying the breathtaking alpine scenery. Whether exploring the trails or experiencing the charm of this Swiss village, September offers a unique blend of cool temps and vibrant landscapes.
In September, Airolo, Switzerland begins to transition from the warmth of summer to the cooler embrace of autumn, showcasing a noticeable drop in temperatures. The average temperature hovers around 7°C (44°F), with daily highs reaching a pleasant 18°C (65°F), making it an ideal time for outdoor enthusiasts to explore the stunning alpine landscapes. The minimum temperature of -11°C (13°F) hints at the impending chill, reminding visitors that winter's approach is not far off. As the month progresses, the crisp air invites a stunning display of fall foliage, allowing for breathtaking views while temperatures remain mild enough for enjoyable daytime excursions. Overall, September in Airolo offers a delightful blend of vibrant scenery and comfortably cool weather.
In September, Airolo experiences a notable shift in precipitation, recording 146 mm (5.7 in) over 16 days. This marks a decrease from the preceding months, particularly the heavy precipitation of August where 256 mm (10.1 in) fell in the same number of days. Despite this drop, September still maintains a robust level of rainfall, contributing significantly to the area's lush landscapes. As temperatures begin to cool, the autumn arrival is marked by more frequent rain showers, as the transition leads into a wetter October, which typically sees an increase in precipitation to 228 mm (9.0 in). This pattern underscores a vibrant seasonal cycle in Airolo, where each month brings its own unique character to the region’s weather.
In Airolo, Switzerland, September marks a transition in humidity levels, settling at 83%—a subtle note of comfort as summer wanes. Throughout the year, humidity tends to peak in the colder months, with January and October each reaching a high of 92%. Interestingly, a gradual decline occurs from the winter peak to the drier month of May, where humidity dips to 80%. As summer approaches its end, September maintains a balance, slightly higher than August's 80%, suggesting a lingering warmth in the air before the onset of fall, where humidity begins to rise again in October. Overall, Airolo's humidity showcases a cyclical rhythm, responding naturally to the changing seasons.
As September rolls into Airolo, Switzerland, the UV Index settles at a moderate level of 7, marking a transition from the intense summer rays. This drop to a high exposure category means you’ll need to be cautious, with a burn time of approximately 25 minutes for unprotected skin. Compared to the peaks of June and July, where the UV Index soared to 11, September offers a more manageable environment, though vigilance remains crucial. As the daylight begins to wane with the onset of autumn, residents and visitors alike are encouraged to enjoy the outdoors while still being mindful of sun exposure. For detailed insights about UV safety, check out the Airolo UV Index.
UV Risk Categories
As the summer days fade, September in Airolo, Switzerland, still bathes in a remarkable 318 hours of sunlight, showcasing a gentle transition from the sun-soaked months of July and August to the cooler fall season. This month stands out as a beautiful bridge, maintaining a lush warmth while slowly descending from the peak sunshine hours of 415 in July. After a dazzling summer, the sunlight begins to wane, yet September continues to offer a vibrant atmosphere, with ample time for outdoor exploration before the crisp autumn air takes over. Overall, the trend reveals a gradual decline from the sunny days of May through October, yet September retains a sweet spot of luminosity, inviting visitors to revel in the last rays of summer.
In Airolo, Switzerland, the likelihood of sunny weather in September hovers around 20%, aligning with the trend of fluctuating sunshine throughout the year. While this month's chances are notably lower than the sunnier days of spring and summer—where March peaks at 39%—September presents a moderate opportunity for some bright spells. Notably, this month follows a slightly sunnier August, which boasts a 33% chance of sunshine. As the year transitions into autumn, the likelihood of sunny days begins to rise again in October, hitting 36%. So, if you plan to visit Airolo in September, prepare for a mix of sun and clouds, with the unlikeliness of clear skies becoming a backdrop to the stunning alpine scenery.
As summer transitions into autumn, September in Airolo, Switzerland experiences a notable shift in daylight, with approximately 12 hours of sunshine. Following the luminous months of June through August, which boast a consistent 15-hour daylight duration, September begins to show the effects of the approaching winter. The daylight hours decrease gradually, marking the start of a significant seasonal change. This reduction, from the vibrant 15 hours of summer to the more subdued 12 hours in September, signals an impending retreat into shorter days as the year progresses towards October, when daylight will dwindle further to 10 hours. The cyclical rhythm of light and darkness beautifully illustrates nature's transition, inviting residents and visitors alike to savor the rich hues of early autumn.
As September unfolds in Airolo, Switzerland, the average wind speed gently tapers to 1.2 m/s (3 mph), marking a notable decline from the warmer months of summer. This subtle shift signals the transition from the brisker winds of the earlier year, with July and August maintaining speeds of 1.5 m/s (3 mph) and 1.4 m/s (3 mph), respectively. The winds don’t just calm; they create a serene backdrop for the stunning alpine landscapes, inviting visitors to appreciate the beauty of nature in a more tranquil setting. As October approaches, winds pick up slightly again, foreshadowing a dynamic change with an expected increase to 1.7 m/s (4 mph), hinting at the invigorating chill that heralds autumn. This cyclical dance of wind speed encapsulates the essence of seasonal change in this picturesque Swiss locale.
Weather in Airolo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Airolo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a chilly -11°C (13°F) at night to a moderate high of 18°C (65°F) during the day, with an average temperature of 7°C (44°F). This month also sees significant rainfall, accumulating 146 mm (5.7 in) over 16 days, accompanied by a humidity level of 83%. In contrast, January experiences much colder conditions, with nighttime lows plunging to -23°C (-9°F) and daytime highs only reaching 2°C (36°F). The average temperature in January is a frigid -10°C (15°F), with slightly less precipitation at 129 mm (5.1 in), spread over 12 days, but a higher humidity level of 92%. For more details on the weather during this chilly month, check out Airolo weather in January.
In September, temperatures range from a chilly -11°C (13°F) at night to a mild high of 18°C (65°F) during the day, with an average temperature of 7°C (44°F). The month is characterized by significant precipitation, totaling 146 mm (5.7 inches) over 16 days, and a humidity level of 83%. In contrast, February is much colder, with temperatures plummeting to a minimum of -25°C (-13°F) and peaking at just 7°C (45°F), resulting in an average temperature of -7°C (20°F). While it experiences less precipitation than September, at 83 mm (3.3 inches) over 12 days, February's humidity is slightly higher at 89%. For more details on February conditions, you can check Airolo weather in February.
In September, the weather in Airolo features milder temperatures, with a minimum of -11°C (13°F) and an average of 7°C (44°F), peaking at a maximum of 18°C (65°F). With 146 mm (5.7 in) of precipitation over 16 days, the humidity is relatively high at 83%. In contrast, March experiences cooler conditions, with a minimum temperature of -24°C (-11°F) and an average of -5°C (23°F), reaching a maximum of 10°C (50°F). Despite slightly lower precipitation at 126 mm (5.0 in) over 15 days, the humidity is marginally higher at 87%. This comparison highlights the transition from the last whispers of winter in March to the brisk early autumn of September. For more detailed information, you can check Airolo weather in March.
In comparing the weather in September and April, notable differences can be observed in temperature and precipitation patterns. September boasts a milder temperature range with a minimum of -11°C (13°F) and a maximum of 18°C (65°F), averaging around 7°C (44°F). In contrast, April experiences cooler conditions, with temperatures ranging from a minimum of -17°C (1°F) to a maximum of 11°C (52°F) and an average of -1°C (30°F). Additionally, while both months see a fair amount of rainfall, September records 146 mm (5.7 in) over 16 days, compared to April's 129 mm (5.1 in) over just 12 days. Humidity levels remain similar in both months, with September at 83% and April slightly higher at 84%. For more specific details on April weather, please refer to Airolo weather in April.
In comparing the weather between September and May, we observe some notable differences. September typically boasts milder temperatures, with an average of 7°C (44°F), while May's average is slightly cooler at 3°C (37°F). Both months experience a minimum temperature of -11°C (13°F); however, September sees a higher maximum at 18°C (65°F) compared to May's 16°C (62°F). Precipitation levels are quite similar, with September receiving 146 mm (5.7 in) over 16 days and May slightly higher at 164 mm (6.5 in) over 20 days. Additionally, humidity levels are fairly comparable, with September at 83% and May at 80%. For more specific details on May weather, you can check Airolo weather in May.
In comparing the weather patterns of September and June, September experiences a cooler climate with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 18°C (65°F), while June offers milder conditions with temperatures between -3°C (27°F) and 26°C (79°F). September sees an average temperature of 7°C (44°F) compared to June's average of 9°C (48°F). Additionally, precipitation is higher in June, with 203 mm (8.0 in) over 19 days, compared to September's 146 mm (5.7 in) across 16 days. Humidity levels are relatively similar, with September at 83% and June slightly lower at 82%. For more details, you can check the Airolo weather in June.
In comparing the weather between September and July, we notice a significant shift in temperatures and precipitation patterns. September experiences a wider temperature range, with minimums dropping to -11°C (13°F) and maximums reaching 18°C (65°F), yielding an average temperature of 7°C (44°F). This cooler month also sees 146 mm (5.7 in) of precipitation over 16 days. In contrast, July is milder, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 22°C (72°F), and an average of 11°C (51°F). However, July is also wetter, receiving 215 mm (8.5 in) of rain across 21 days, resulting in a similar humidity level of 83%. For a closer look at July's weather specifics, you can check Airolo weather in July.
In comparing the weather of September to that of August, September tends to be cooler and wetter. The minimum temperature in September drops to -11°C (13°F), while it is less harsh in August, with a minimum of -1°C (31°F). The average temperature for September is 7°C (44°F), compared to August's 10°C (51°F), while the maximum temperature in September reaches 18°C (65°F), slightly lower than August's 21°C (70°F). Additionally, September experiences more precipitation, with 146 mm (5.7 in) over 16 days, whereas August sees a heftier total of 256 mm (10.1 in) across 21 days, though with a slightly lower humidity of 80%. For further details on August weather, you can refer to Airolo weather in August.
In comparing the weather between September and October, we see a noticeable drop in average temperatures. September boasts an average temperature of 7°C (44°F), with highs reaching 18°C (65°F), while October sees a further decline to an average of 2°C (35°F), capped at 14°C (57°F). Precipitation also increases significantly in October, totaling 228 mm (9.0 in) over 13 days, compared to September's 146 mm (5.7 in) across 16 days. Additionally, October is characterized by higher humidity levels, rising to 90% compared to September's 83%. For a more detailed look at weather specifics, you can visit Airolo weather in October.
September and November present stark contrasts in weather conditions. In September, temperatures range from a chilly -11°C (13°F) at night to a pleasant maximum of 18°C (65°F) during the day, with an average temperature of 7°C (44°F). The month sees significant precipitation of 146 mm (5.7 in) over 16 days, alongside a humidity level of 83%. In contrast, November brings colder temperatures, with nighttime lows plummeting to -21°C (-5°F) and daytime highs only reaching up to 9°C (48°F), resulting in an average temperature of -4°C (25°F). This month experiences slightly higher precipitation at 154 mm (6.0 in) over 15 days and humidity rises to 88%. For a more detailed look, visit Airolo weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a minimum of -11°C (13°F) to a maximum of 18°C (65°F), with an average of 7°C (44°F). This month experiences considerable precipitation, totaling 146 mm (5.7 in) over 16 days, and the humidity hovers around 83%. In comparison, December is significantly colder, with temperatures dipping to a minimum of -21°C (-5°F) and peaking at just 3°C (38°F), averaging -8°C (18°F). The precipitation increases to 182 mm (7.2 in) spread over 18 days, accompanied by higher humidity at 90%. For a detailed look at the weather in December, you can visit Airolo weather in December.
As summer wanes, September in Airolo presents a notable shift in weather that distinctly sets it apart from previous months. With temperatures averaging around 7°C (44°F), the days are cooler and often more humid, creating a crisp atmosphere perfect for welcoming the autumn season. Rainfall becomes more frequent, with nearly half the month experiencing some precipitation, adding to the lush, vibrant landscape. This transition period not only invites outdoor enthusiasts to embrace the unique beauty of Airolo but also prepares the region for the colder months ahead. For more insights into how September fits into the overall climate of this stunning area, check out Airolo Climate.