Last updated: August 27, 2025
In Wilderswil, Switzerland, September brings a mild and refreshing climate, with temperatures ranging from a comfortable maximum of 23°C (73°F) to a cool minimum of 0°C (32°F). The month averages around 11°C (53°F), providing a pleasant atmosphere for outdoor activities. However, visitors should be prepared for frequent rainfall, as September experiences 124 mm (4.9 in) of precipitation over approximately 14 days, contributing to a high humidity level of 83%. This combination of conditions nurtures the lush landscapes of the region, making it an enchanting time to explore the natural beauty of Wilderswil.
In September, Wilderswil experiences a delightful transition as summer edges toward autumn. With temperatures ranging from a refreshing 0°C (32°F) at night to a pleasant maximum of 23°C (73°F) during the day, the climate becomes perfectly suited for outdoor activities amidst stunning alpine scenery. The average temperature of 11°C (53°F) captures the essence of early fall, where crisp air blends with lingering warmth, offering a harmonious balance that invites both exploration and relaxation. This month marks a significant shift from the balmy days of August, yet still retains enough warmth to enjoy the breathtaking landscapes as the leaves begin to hint at their autumnal hues.
September in Wilderswil sees a moderate precipitation level of 124 mm (4.9 in), marking a shift from the more abundant summer rains. This month typically experiences around 14 rainy days, indicating a transition as summer tapers off and autumn begins to take hold. While September's rainfall is slightly lower than the peak months of June (225 mm) and July (219 mm), it parallels the amounts seen in January and March, suggesting a return to more stable, yet still wet, conditions. As the lush greens of summer fade, the increased likelihood of rain hints at the upcoming autumnal transformation, setting the stage for the vibrant colors and crisp air that follow.
As the summer months draw to a close, September humidity in Wilderswil, Switzerland, settles at a comfortable 83%. This marks a slight uptick from the 80% observed in August, suggesting a gradual transition towards the chillier and more humid autumn months. It's interesting to note that, throughout the year, humidity levels peak in the winter and early spring, reaching a high of 92% in January and remaining relatively consistent with 90% in October and December. The data reflects a gentle decline in humidity from spring to late summer, followed by a modest increase as the year progresses into the cooler months, making September a perfect blend of refreshing crispness and lingering warmth.
In September, Wilderswil experiences a notable shift in UV exposure, with the UV Index reaching 7, indicating a high level of UV radiation. This is a decrease from the peak of 10 seen during the summer months, yet it still necessitates caution, as individuals may only safely enjoy sunshine for approximately 25 minutes before risking skin damage. As autumn approaches, it's essential to remain mindful of UV levels, despite cooler temperatures, and take appropriate sun protection measures. For more detailed insights on the UV Index throughout the year, explore our resource here: Wilderswil UV Index.
UV Risk Categories
As the summer heat begins to wane, September in Wilderswil offers a delightful transition, featuring 322 hours of sunshine—a notable change from the peak of summer. After basking in an impressive 416 hours in July, the sunlight gently tapers off, mirroring the picturesque autumn hues that start to blanket the landscape. While September sees fewer sunlit days compared to the vibrant summer months, it still provides an abundance of light, outshining October's 285 hours. This trend of gradually lessening daylight continues into the fall, creating a perfect balance of warmth and crispness as the seasons shift. Embrace the beauty of this month where sunny days linger just a little longer, inviting outdoor adventures against the backdrop of the stunning Swiss Alps.
In Wilderswil, Switzerland, the likelihood of sunny weather in September stands at a solid 38%, mirroring the sunnier conditions of August and aligning closely with the trends observed in the preceding and following months. After the gradual increase seen from the cold winter months to the brighter spring, the summer vibrancy tends to plateau in late summer. While June and July both show a moderate 33% chance of sunny days, September maintains a comparable outlook, suggesting that as autumn approaches, residents can still relish in an array of sunlit moments before the days grow shorter. Notably, with October jumping to 43%, sunny opportunities remain optimistic as the region transitions into the fall season.
As summer fades into autumn in Wilderswil, Switzerland, September witnesses a gentle tapering of daylight, providing around 12 hours of sunshine each day. This month marks a shift from the peak brightness of June and July, which basked in 15 hours of daylight, offering ample time for outdoor adventures and exploration. Following the warmth of summer, the daylight begins to shorten gradually, leading into the cozy embrace of autumn. With the arrival of October, daylight dwindles further to 10 hours, hinting at the seasonal transition. This rhythmic pattern showcases the captivating changes in nature, where each month unfolds its own charm as the days grow shorter and the vibrant hues of fall emerge.
As summer transitions into fall, September in Wilderswil, Switzerland, brings a calm breath of air with an average wind speed of 1.3 m/s (3 mph). This gentle breeze aligns with the trend observed through the warmer months, where wind speeds generally hover around similar levels, particularly from June to August. The wind's subtlety in September evokes a serene atmosphere, providing a perfect backdrop for the stunning alpine scenery. Surrounded by majestic mountains, the soft winds in September indicate a subtle shift, paving the way for the brisker gusts of autumn that are just around the corner, while also echoing the tranquil charm that defines this enchanting village.
Weather in Wilderswil varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wilderswil, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Wilderswil is milder, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 23°C (73°F), and an average of 11°C (53°F). The month sees about 124 mm (4.9 in) of precipitation spread over 14 days, accompanied by high humidity levels at 83%. In contrast, January brings much colder conditions, where temperatures can plummet to -19°C (-1°F) at night, with daytime highs reaching only up to 9°C (48°F) and an average of -3°C (26°F). The precipitation remains similar at 123 mm (4.9 in), but it falls over just 12 days, and the humidity is higher at 92%. For more details on the January climate, you can check Wilderswil weather in January.
September and February present strikingly different weather conditions. In September, temperatures range from a cool 0°C (32°F) at night to a pleasant max of 23°C (73°F) during the day, with an average of 11°C (53°F). The month typically sees about 124 mm (4.9 in) of precipitation over 14 days, coupled with humidity levels around 83%. In contrast, February is significantly colder, experiencing a minimum temperature of -18°C (-1°F) and a maximum of 14°C (58°F), with an average temperature of -1°C (31°F). Precipitation in February is slightly lower at 103 mm (4.0 in) over 11 days, and humidity is higher at 89%. For more details, check out Wilderswil weather in February.
In comparing the weather of September and March, we see notable differences in temperature and conditions. September enjoys milder temperatures, with a minimum of 0°C (32°F) and an average of 11°C (53°F), reaching a maximum of 23°C (73°F). In contrast, March is much colder, starting at a minimum of -23°C (-9°F) and averaging only 2°C (36°F), with a maximum of 16°C (60°F). Both months experience similar levels of precipitation, with September receiving 124 mm (4.9 in) over 14 days and March showing 125 mm (4.9 in) over 15 days, but March is marked by higher humidity at 87% compared to September's 83%. For a closer look at March weather patterns, you can visit Wilderswil weather in March.
When comparing the weather in September and April, notable differences emerge. September typically experiences milder temperatures, with averages around 11°C (53°F) and maximums reaching 23°C (73°F), contrasted with April's chillier conditions that average 5°C (42°F) and peak at 19°C (67°F). Additionally, while September has slightly higher precipitation at 124 mm (4.9 in) over 14 days, April sees 94 mm (3.7 in) accumulated across 12 days, making it a bit drier overall. In terms of humidity, both months are quite similar, with September holding at 83% and April slightly higher at 84%. For more detailed insights about April weather, you can visit Wilderswil weather in April.
In comparing the weather between September and May, we notice some distinct differences. September tends to be milder, with average temperatures ranging from 11°C (53°F) to a maximum of 23°C (73°F), while May sees slightly cooler averages of 9°C (48°F), with highs reaching up to 25°C (78°F). Interestingly, May experiences more precipitation, totaling 182 mm (7.2 in) over 19 days, compared to September's 124 mm (4.9 in) spread across 14 days. Although September has slightly higher humidity at 83%, May remains reasonably humid at 80%. For a detailed look at May weather in Wilderswil, you can visit Wilderswil weather in May.
In comparing the weather between September and June, we see notable differences in temperature and precipitation. September's temperatures range from a chilly 0°C (32°F) at night to a warm 23°C (73°F) during the day, with an average of 11°C (53°F). In contrast, June enjoys milder nights with a minimum of 1°C (34°F) and hotter daytime highs reaching 29°C (85°F), averaging 14°C (57°F).
Precipitation is also more significant in June, with 225 mm (8.9 in) over 18 rainy days, compared to September's 124 mm (4.9 in) falling over 14 days. Humidity remains fairly consistent, at 83% in September and 82% in June. For more detailed information on June weather, check out Wilderswil weather in June.
In comparing the weather of September to that of July, we can see distinct differences in temperature and precipitation. September tends to be cooler, with average temperatures ranging from a minimum of 0°C (32°F) to a maximum of 23°C (73°F), while July offers warmer conditions, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (84°F). Additionally, September experiences lower overall precipitation at 124 mm (4.9 in) over 14 days, in contrast to July’s higher precipitation of 219 mm (8.6 in) across 18 days. Despite the variations in temperature and rainfall, both months maintain a consistent humidity level of 83%. For more detailed insights, you can refer to the Wilderswil weather in July.
In comparing the weather of September to that of August, we notice a significant drop in temperatures. September's minimum temperature dips to 0°C (32°F), with an average of 11°C (53°F) and a maximum of 23°C (73°F), while August features a higher range with a minimum of 5°C (41°F), an average of 15°C (59°F), and a peak of 28°C (82°F). Additionally, September experiences lower precipitation at 124 mm (4.9 in) over 14 days, as opposed to August's 203 mm (8.0 in) over 18 days, although September's humidity remains slightly higher at 83% compared to August's 80%. For a more detailed look, check out Wilderswil weather in August.
September and October exhibit distinct shifts in weather patterns. In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 23°C (73°F), creating a pleasant average of 11°C (53°F). This month experiences a total precipitation of 124 mm (4.9 in) over 14 days with humidity at 83%. In contrast, October sees cooler temperatures, with a minimum dipping to -4°C (26°F) and an average of just 7°C (45°F), while the highs reach 19°C (67°F). The precipitation increases slightly to 138 mm (5.4 in) over 13 days, accompanied by a rise in humidity to 90%. This shift emphasizes a transition from the mild warmth of September to the crisp chill characteristic of October. For more detailed insights, you can check Wilderswil weather in October.
September and November exhibit notable differences in weather patterns. September typically enjoys a milder temperature range, with minimums around 0°C (32°F) and maximums peaking at 23°C (73°F), leading to an average of 11°C (53°F). In contrast, November sees a significant drop, with minimum temperatures reaching -10°C (13°F) and an average of just 2°C (35°F), despite a warmer maximum of 18°C (64°F). While September experiences more precipitation at 124 mm (4.9 in) over 14 days, November has slightly less rain at 97 mm (3.8 in) over 13 days. Additionally, humidity levels rise from 83% in September to 88% in November, contributing to a colder, wetter environment. For those curious about more detailed weather information, you can check Wilderswil weather in November.
September and December showcase distinct weather patterns indicative of the changing seasons. In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 23°C (73°F), with an average of 11°C (53°F). The month experiences approximately 124 mm (4.9 in) of precipitation over 14 days and holds a relatively high humidity level of 83%. In contrast, December brings colder conditions, with temperatures plummeting to a minimum of -13°C (8°F) and only reaching a maximum of 9°C (49°F), averaging -2°C (29°F). Precipitation increases to 175 mm (6.9 in) across 17 days, and humidity rises to 90%. These differences highlight the transition from the mild and wetter early autumn to the frigid and damp winter months. For more detailed weather information, you can check Wilderswil weather in December.
As summer gradually yields to autumn, September in Wilderswil brings a refreshing shift in weather patterns. With a noticeable drop in temperatures compared to the warm summer months, you can expect mild days with a mix of cool nights. The average humidity remains high, contributing to a lush and vibrant landscape, while increased precipitation marks a transition to more rain-soaked days. This month often sees around two weeks of rain, making it essential for visitors to prepare for varying conditions. Whether you’re exploring the stunning surroundings or enjoying local festivities, September offers a unique and charming atmosphere that sets the stage for the enchanting fall ahead. For more insights on what to expect throughout the year, check Wilderswil Climate.