Last updated: August 27, 2025
In September, Schwyz, Switzerland, experiences a dynamic climate characterized by a maximum temperature reaching 23°C (74°F), while the average hovers around a cool 11°C (52°F). The month is marked by a significant presence of precipitation, with approximately 168 mm (6.6 in) falling over 16 days, creating a lush landscape. Humidity levels are relatively high at 83%, contributing to a crisp and refreshing atmosphere that envelops this picturesque alpine region. Whether enjoying the vibrant autumnal hues or navigating the occasional rain, September in Schwyz offers a unique blend of serenity and adventure.
As September unfolds in Schwyz, Switzerland, a noticeable transition occurs, marking the gradual shift from the warm summer days to the cooler embrace of autumn. With temperatures ranging from a crisp -1°C (30°F) at night to a pleasant 23°C (74°F) during the day, the month offers a delightful blend of cool breezes and sunny afternoons, inviting residents and visitors alike to enjoy the picturesque landscapes. The average temperature settles at a cozy 11°C (52°F), providing a perfect backdrop for exploring the charming surroundings. As the warm hues of summer begin to fade, September serves as a gentle reminder of the changing seasons, encouraging outdoor adventures before the chill of winter sets in.
September in Schwyz, Switzerland, serves as a bridge between summer and autumn, showcasing a moderate precipitation total of 168 mm (6.6 in) over 16 days. This reflects a noticeable decrease compared to the wetness of August, which recorded 231 mm (9.1 in) across the same number of days. Interestingly, the trend of late summer rainfall persists through September, marking it as one of the wetter months of the year, albeit with more moderate totals. As the region transitions into autumn, the precipitation begins to stabilize, hinting at the drier conditions expected in the coming months. This period not only signals a shift in weather patterns but also enriches the lush greenery that characterizes Schwyz’s landscape, making it an enchanting time for nature enthusiasts.
In September, humidity levels in Schwyz, Switzerland, hover around 83%, marking a slight uptick from the summer months. This transitional period sees a gentle return to the more humid conditions characteristic of the autumn months, as the humidity begins to reflect the approach of October's higher average of 90%. Over the year, one can observe a gradual decline in humidity from the peak of 92% in January to its lowest point of 80% in May, followed by a modest rise as the year progresses. September's 83% not only indicates a balance between the summer's warmth and the impending chill of autumn but also highlights the region's unique blend of humid and crisp air as nature shifts into a new season.
In September, Schwyz experiences a noticeable transition in its UV Index, which sits at 6—a shift from the peak summer months of July and August, when levels reached a very high 9 and 8, respectively. As early autumn settles in, the UV exposure category drops to high with a burn time of 25 minutes, allowing residents and visitors a bit more leeway on sun safety compared to the earlier summer months. This trend underscores a gradual decrease in solar intensity as the year progresses, yet it still emphasizes the importance of protection against UV rays. For more detailed insights on UV levels throughout the year, visit Schwyz UV Index.
UV Risk Categories
As summer transitions into autumn, September in Schwyz, Switzerland, offers a delightful balance of sunny days and cooler evenings. With 314 hours of sunshine, September boasts a notable dip from the vibrant summer months, yet it still shines brighter than the upcoming autumn. This month marks a graceful slide from the peak of July's 410 hours, as the region transitions to the cozy embrace of fall. While October will see a further decrease to 275 hours, lovers of outdoor activities can still indulge in the lingering warmth and stunning landscapes that September brings, making it a perfect time to explore the natural beauty of this enchanting location.
In Schwyz, Switzerland, September brings a moderate chance of sunny weather, with 36% likelihood of clear skies. This marks a slight improvement compared to the summer months, where sunshine chances hover around 30%. Interestingly, September often bridges the gap between the waning warmth of summer and the crispness of autumn, making it a delightful time for outdoor activities. As the year progresses towards October, the chance of sunshine increases back to 40%, suggesting that while the days may grow shorter, the brighter moments can still shine through this transition month. Overall, September stands out as a promising time for sun seekers in the region.
As September unfolds in Schwyz, Switzerland, the days begin to transition from the long, sun-drenched hours of summer to the shorter daylight typical of autumn. With approximately 12 hours of daylight, September marks a significant reduction from the peak 15 hours enjoyed in June and July. This gradual decline in sunlight reflects a natural trend as the region shifts from the vibrant energy of summer towards the more subdued hues of fall. Despite this decrease, the lingering warmth and light offer a beautiful backdrop for outdoor adventures, making September a perfect time to savor the last glimpses of summer before the days shorten further in October.
As September arrives in Schwyz, the gentle caress of the wind continues its steady rhythm, maintaining an average speed of 1.3 m/s (3 mph) – a trend consistent with the preceding summer months. This tranquil breeze, reminiscent of the warm days just past, invites locals and visitors alike to enjoy the stunning landscape without the interruption of blustery gusts. While autumn whispers promises of change, the wind’s reliable consistency this time of year mirrors the peaceful transition of nature, offering a serene backdrop as the leaves begin their colorful descent. As we move into October, a slight uptick to 1.5 m/s hints at the brewing chill of winter, but for now, September holds a beautiful balance, inviting a leisurely appreciation of the season.
Weather in Schwyz varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Schwyz, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, we observe a stark contrast in temperatures and conditions. September features a mild temperature range, with minimums of 1°C and maximums reaching 23°C, averaging around 11°C. In contrast, January experiences much colder conditions, with minimum temperatures plummeting to -18°C and a maximum of just 9°C, resulting in an average of -4°C. Additionally, both months have notable precipitation levels, with September receiving 168 mm over 16 days, while January has slightly less at 154 mm over 12 days. The humidity is also higher in January at 92%, compared to September's 83%. For more detailed insights, you can check Schwyz weather in January.
In comparing the weather of September and February, it is evident that September enjoys milder temperatures, with averages around 11°C (52°F) and highs reaching 23°C (74°F), while February experiences much colder conditions, averaging -2°C (30°F) and peaking at only 12°C (54°F). Precipitation is more frequent in September, with 168 mm (6.6 in) over 16 days, compared to February's 108 mm (4.2 in) spread over just 12 days. Additionally, September's humidity sits at 83%, slightly lower than February's 89%, which contributes to a more crisp and chilly feel during the winter month. For more detailed insights on February weather in the area, you can check Schwyz weather in February.
September and March present contrasting weather conditions in Schwyz. In September, temperatures range from a cool min of -1°C (30°F) to a pleasant max of 23°C (74°F), with an average of 11°C (52°F). The month experiences significant precipitation, totaling 168 mm (6.6 inches) over 16 rainy days, and humidity levels are relatively high at 83%. In contrast, March is notably colder, with temperatures varying from a min of -24°C (-10°F) to a max of 16°C (62°F), averaging around 1°C (34°F). Although March has slightly less precipitation at 136 mm (5.3 inches) over 17 days, the humidity is slightly higher at 87%. For more detailed information on March weather, visit Schwyz weather in March.
In comparing the weather between September and April, September tends to be milder overall, with average temperatures around 11°C (52°F), while April sees a cooler average of just 5°C (41°F). Notably, April experiences lower minimum temperatures, dipping to -16°C (4°F), compared to September's minimum of -1°C (30°F). Both months have a significant amount of precipitation, with September receiving 168 mm (6.6 in) over 16 days and April accumulating 114 mm (4.5 in) over 14 days. Humidity levels are similar in both months, hovering around 83% in September and slightly higher at 84% in April. For a more detailed look, you can check Schwyz weather in April.
In comparing the weather patterns of September and May, we can observe some notable differences. September sees a milder average temperature of 11°C (52°F) with a maximum of 23°C (74°F), while May, typically cooler, has an average of 8°C (48°F) and peaks at 25°C (77°F). Additionally, September experiences fewer days of precipitation—16 days with a total of 168 mm (6.6 in)—compared to May, which has 22 rainy days and a higher total of 190 mm (7.5 in). Humidity levels are relatively high in both months, with September at 83% and May slightly lower at 80%. For more detailed insights into the weather during this month, you can visit Schwyz weather in May.
In comparing the weather of September and June, we can observe some notable differences. September typically has a cooler temperature range, with a minimum of -1°C (30°F) and an average temperature of 11°C (52°F), peaking at 23°C (74°F). In contrast, June boasts a milder climate, with temperatures starting from a minimum of 1°C (35°F), averaging 14°C (57°F), and reaching a maximum of 29°C (85°F). Additionally, June experiences more precipitation, with 229 mm (9.0 in) over 20 days, compared to September's 168 mm (6.6 in) over 16 days. Humidity levels remain relatively similar in both months, with September at 83% and June slightly lower at 82%. For a more detailed look at June weather specifics, visit Schwyz weather in June.
In comparing the weather of September and July, we observe distinct differences in temperature and precipitation patterns. September experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 11°C (52°F), while July is considerably warmer, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 29°C (84°F). Both months share the same humidity level of 83%, but July sees a higher total precipitation of 208 mm (8.2 in) over 19 days compared to September's 168 mm (6.6 in) over 16 days. For more detailed information, you can check Schwyz weather in July.
In comparing the weather of September to that of August, it's evident that September experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 11°C (52°F), while August sees milder conditions, starting at a minimum of 5°C (41°F) and averaging 15°C (59°F). Additionally, September has a slightly lower maximum temperature at 23°C (74°F) compared to August's 27°C (80°F). When it comes to precipitation, September has 168 mm (6.6 in) over 16 days, which is less than August's 231 mm (9.1 in) spread across 19 days. Humidity levels are comparable, with September at 83% and August at 80%, but the relatively higher humidity in September coincides with cooler temperatures. For more detailed weather insights, you can check Schwyz weather in August.
In September, the weather showcases a transition from summer to autumn, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 23°C (74°F) and an average of 11°C (52°F). The month experiences significant precipitation, totaling 168 mm (6.6 in) over 16 rainy days, accompanied by a humidity level of 83%.
In contrast, October tends to be cooler, with temperatures dipping further to a minimum of -3°C (26°F) and an average of 7°C (45°F), peaking at a maximum of 18°C (65°F). Although October's rainfall is slightly less, with 162 mm (6.4 in) recorded over 14 days, the humidity increases to 90%. This shift in weather signals the deeper onset of autumn. For more detailed information, you can check the Schwyz weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a mild minimum of -1°C (30°F) to a comfortable maximum of 23°C (74°F), with an average of 11°C (52°F). The month experiences significant rainfall, totaling 168 mm (6.6 in) over 16 days, accompanied by a humidity level of 83%. In contrast, November sees colder temperatures, with a minimum of -11°C (12°F) and an average of 2°C (35°F), peaking at 17°C (62°F). Although precipitation decreases to 102 mm (4.0 in) across 12 days, the humidity rises slightly to 88%. For a detailed perspective on November's climate, you can explore Schwyz weather in November.
In September, the weather is significantly milder, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 23°C (74°F), and an average of 11°C (52°F). This month experiences about 168 mm (6.6 in) of precipitation over 16 days, coupled with a humidity of 83%. In contrast, December brings much colder conditions, with temperatures dropping to a minimum of -15°C (6°F), an average of -2°C (29°F), and a maximum of only 8°C (47°F). Precipitation increases slightly to 190 mm (7.5 in) over 19 days, and humidity rises to 90%. For a more detailed look at the December weather patterns, visit Schwyz weather in December.
As September unfolds in Schwyz, this transitional month brings a captivating mix of autumnal charm and lingering summer warmth. With temperatures cooling from the highs of summer, visitors can expect refreshing days and crisp nights, a stark contrast to the peak heat of July and August. The notable increase in precipitation and humidity suggests that rainy days become more frequent, prompting a shift in outdoor activities and attire. This blend of weather patterns makes September an ideal time for experiencing the changing foliage while enjoying the serene beauty of the landscape. To learn more about what to expect throughout the year, visit Schwyz Climate.