Last updated: August 27, 2025
September in Gersau, Switzerland offers a captivating transition from summer to autumn, characterized by a maximum temperature reaching 25°C (77°F) and a refreshing average of 13°C (56°F). However, as the month unfolds, temperatures can dip to a minimum of 1°C (34°F). With 146 mm (5.8 in) of rainfall spread across 15 days, this month sees a notable increase in humidity, averaging 83%, creating a lush and vibrant atmosphere. Visitors can expect a blend of pleasant warm days and the fresh crispness of early fall, making September a delightful time to experience the natural beauty of this Swiss gem.
As September unfolds in Gersau, Switzerland, the transition from summer to autumn becomes evident. Daytime temperatures average a comfortable 13°C (56°F), with highs reaching a pleasant 25°C (77°F), providing ideal conditions for outdoor explorations. However, nights begin to cool down with minimum temperatures dropping to 1°C (34°F). This month signifies a notable shift in the weather as it bridges the warmth of summer and the crispness of fall. The balance of mild days and cooler evenings creates a picturesque setting, inviting both locals and visitors to soak in the stunning Swiss landscapes before winter approaches.
In September, Gersau, Switzerland experiences a notable shift in its precipitation patterns, receiving 146 mm (5.8 in) over 15 days. While this marks a decrease compared to the preceding month of August, which recorded the highest rainfall of the year at 203 mm (8.0 in), September still maintains robust precipitation levels. This month’s rainfall contributes to the lushness of the region as it transitions into autumn, highlighting a consistent trend of elevated precipitation from June through October. The amount of rain in September is indicative of the region’s climatic characteristics, ensuring the landscapes remain vibrant and full of life as the cooling temperatures begin to set in.
In Gersau, Switzerland, September experiences a blend of mild warmth and noticeable humidity, with levels sitting at 83%. This places it slightly higher than the humidity in the preceding summer months, where August recorded 80%. As autumn approaches, the trend suggests a gradual rise in moisture levels, foreshadowing the heavier humidity characteristic of the colder months ahead, where figures soar back to 90% in both October and December. Overall, September acts as a transitional month, bridging the drier summer with the more humid autumn and winter seasons that follow.
As summer wanes in Gersau, Switzerland, September brings a notable shift in the UV Index, dropping to 6, which is categorized as high. This marks a transition from the intense afternoon sun of July and August, where the UV Index peaked at 9, necessitating vigilant sun protection with a burn time of just 15 minutes. In contrast, the longer burn time of 25 minutes in September allows for a bit more leniency, though caution is still advised. The high exposure category signifies that while the sun isn’t as fierce as during the height of summer, effective sun protection remains important, as the days still offer ample sunshine. As we move into fall, it’s essential to stay aware of changing sun conditions. For more detailed information, check the Gersau UV Index.
UV Risk Categories
In Gersau, Switzerland, September marks a beautiful transition into autumn, offering approximately 320 hours of sunshine—a splendid amount that highlights the region's radiant summer days. As the year progresses, a noticeable trend emerges: from an impressive 415 hours in July, sunshine gradually diminishes. However, September still shines brightly compared to the cooler months ahead, such as October with its 279 hours and November's 219 hours. The lingering warmth and daylight create an inviting atmosphere, perfect for outdoor explorations amidst the breathtaking scenery. Embrace the gentle fading of summer, where each sun-drenched day invites you to revel in the natural beauty of this Swiss gem.
In Gersau, Switzerland, the likelihood of enjoying sunny weather in September hovers around 34%, making it a month where the sun shines with moderate frequency. As the summer draws to a close, September comes just after August, which itself brings a decent 33% chance of sunshine. Interestingly, this period sits between the vibrant sunshine of late spring and the dwindling light of autumn, showcasing a slight dip compared to the sunnier late-spring months of April (44%) and May (29%). However, as the days grow cooler and the scenery transforms, residents and visitors can still anticipate pleasant, sunlit moments amidst the evolving seasonal backdrop.
As summer transitions into autumn, September in Gersau, Switzerland sees a gentle decrease in daylight, offering around 12 hours of sunlight. This marks a gradual decline from the peak brightness of 15 hours in the summer months of June, July, and August. Although September still basks in a generous amount of daylight, it signals the onset of shorter days ahead, as daylight inches down towards 10 hours by October. This cozy shift invites locals and visitors alike to relish the lingering warmth and vibrant colors of the changing foliage, making it a beautiful time to explore the scenic landscapes of Gersau.
In September, the gentle breezes of Gersau, Switzerland, linger at an average wind speed of 1.2 m/s (or 3 mph), marking a notable trend in the wind patterns of the year. As summer gives way to autumn, this slight dip in wind speed reflects a broader seasonal shift observed over the months. While the earlier part of the year showcased a bit more vivacity, with peak winds in January and May reaching 1.6 m/s, the latter months consistently hover at a more tranquil pace. This transition paints a serene picture of early fall in Gersau, where visitors can enjoy the calm atmosphere against the stunning backdrop of the Swiss landscape, inviting moments of reflection as nature prepares for the colder months ahead.
Weather in Gersau varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gersau, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase stark contrasts in weather, highlighting the transition from late summer to deep winter. In September, temperatures range from a mild 1°C (34°F) to a pleasant max of 25°C (77°F), while the average temperature sits at 13°C (56°F). In contrast, January is much colder, with temperatures plummeting to a minimum of -15°C (5°F) and peaking at just 11°C (52°F), averaging -1°C (30°F). Both months experience similar precipitation levels, with September recording 146 mm (5.8 in) over 15 days, while January has slightly less at 144 mm (5.7 in) over 13 days. Additionally, humidity levels are notably higher in January at 92%, compared to September's 83%. For more detailed insights, check out Gersau weather in January.
In September, temperatures range from a mild minimum of 1°C (34°F) to a pleasant maximum of 25°C (77°F), with an average of 13°C (56°F), while February experiences much colder conditions, with temperatures dipping as low as -19°C (-1°F) and reaching a maximum of 14°C (58°F), averaging just 1°C (34°F). While September sees more precipitation, totaling 146 mm (5.8 in) over about 15 days, February has slightly less rain at 106 mm (4.2 in) across 12 days. Additionally, humidity is slightly higher in February at 89%, compared to September's 83%. For a detailed look at February weather, you can visit Gersau weather in February.
September and March present stark contrasts in weather conditions. September enjoys milder temperatures, ranging from a minimum of 1°C (34°F) to a comfortable maximum of 25°C (77°F), with an average of 13°C (56°F). The month sees significant rainfall, totaling 146 mm (5.8 in) over 15 days, and maintains a humidity level of 83%. In comparison, March is chillier, with temperatures dipping as low as -15°C (6°F) and reaching a maximum of 18°C (64°F), averaging just 3°C (38°F). While it receives slightly less precipitation at 127 mm (5.0 in) over 17 days, the humidity is slightly higher at 87%. For more detailed weather information, check out Gersau weather in March.
When comparing the weather in September and April, notable differences emerge. September brings milder temperatures, ranging from a chilly minimum of 1°C (34°F) to a pleasant maximum of 25°C (77°F), with an average of 13°C (56°F). In contrast, April is cooler, with temperatures dipping as low as -7°C (19°F) and averaging 7°C (45°F), while the warmest days reach around 22°C (71°F). In terms of precipitation, September sees more rainfall, totaling 146 mm (5.8 in) over 15 days, compared to April’s 104 mm (4.1 in) over 12 days. Humidity levels are similar, with September at 83% and April slightly higher at 84%. For a detailed look at weather conditions in April, visit Gersau weather in April.
September and May present distinct weather patterns, with September generally experiencing milder temperatures than May. September ranges from a minimum of 1°C (34°F) to a maximum of 25°C (77°F) and boasts an average temperature of 13°C (56°F). In contrast, May sees a broader temperature range from a chilly -7°C (19°F) to a warmer maximum of 27°C (80°F), with an average of 10°C (51°F). Rainfall is also significant in both months, with September receiving approximately 146 mm (5.8 in) over 15 days, while May totals around 163 mm (6.4 in) over 19 days. Humidity levels are relatively high, hovering at 83% in September and slightly lower at 80% in May. For more detailed insights, check Gersau weather in May.
When comparing the weather in September and June, we can see notable differences in both temperature and precipitation patterns. September typically sees cooler temperatures, with a minimum of 1°C (34°F) and an average around 13°C (56°F), while June offers warmer conditions with a minimum of 4°C (39°F) and an average temperature of 16°C (60°F). In terms of maximum temperatures, September peaks at 25°C (77°F), which is significantly lower than June’s maximum of 31°C (88°F).
However, precipitation is more pronounced in June, with 189 mm (7.4 in) of rainfall over 18 days compared to September's 146 mm (5.8 in) across 15 days. Both months share a similar humidity level, with September at 83% and June slightly lower at 82%. For those seeking to understand weather patterns in June specifically, more detailed information can be found here: Gersau weather in June.
In comparing the weather between September and July, we see notable differences in temperature and precipitation. September's temperatures range from a minimum of 1°C (34°F) to a maximum of 25°C (77°F), with an average of 13°C (56°F), making it a cooler month overall. In contrast, July experiences warmer conditions, with temperatures ranging from 7°C (45°F) to 31°C (87°F) and averaging 17°C (63°F).
While September has a total precipitation of 146 mm (5.8 in) over about 15 days, July records a higher precipitation level of 190 mm (7.5 in) across 18 days. Interestingly, both months share the same humidity level of 83%, contributing to a damp atmosphere during this period. For more detailed information about July weather, you can refer to Gersau weather in July.
In comparing the weather between September and August, September generally shows a noticeable drop in temperatures, with minimums reaching 1°C (34°F) compared to August's milder minimum of 7°C (45°F). The average temperature in September is 13°C (56°F), which is significantly lower than August's average of 17°C (63°F), while the maximum temperature in September peaks at 25°C (77°F), compared to August's high of 29°C (84°F). Precipitation levels also change, with September receiving 146 mm (5.8 in) over 15 days, while August is wetter, accumulating 203 mm (8.0 in) over 18 days. Humidity remains relatively high in both months, at 83% in September and 80% in August. For a closer look at August weather specifics in Gersau, you can check Gersau weather in August.
September tends to offer more moderate temperatures, with average highs reaching up to 25°C (77°F), compared to October's cooler averages that peak at 20°C (68°F). While both months experience the same minimum temperature of 1°C (34°F), October sees a decline in average daily temperatures, dropping to around 9°C (49°F). Additionally, October is slightly wetter, with an increase in precipitation to 165 mm (6.5 in) over approximately 14 days, compared to September's 146 mm (5.8 in) across 15 days. The humidity also rises in October to 90%, making the air feel even cooler. For a more detailed outlook, check out Gersau weather in October.
September weather typically presents a more moderate climate compared to November, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 25°C (77°F) and an average of 13°C (56°F). This month also sees significant precipitation, averaging 146 mm (5.8 in) over about 15 days, and a humidity level of 83%. In contrast, November experiences cooler temperatures, with minimums dropping to -7°C (19°F) and an average of 4°C (39°F), alongside maximums reaching 19°C (66°F). The precipitation decreases slightly to 102 mm (4.0 in) across 14 days, accompanied by a higher humidity of 88%. For more details, check out Gersau weather in November.
In September, temperatures range from a low of 1°C (34°F) to a comfortable high of 25°C (77°F), with an average of 13°C (56°F). This month typically experiences about 15 days of precipitation, amounting to 146 mm (5.8 in) of rainfall and humidity at 83%. In contrast, December sees much colder conditions, with temperatures dropping to a minimum of -11°C (12°F) and peaking at just 11°C (52°F), averaging around 1°C (33°F). This winter month not only brings chillier temperatures but also an increase in precipitation, totaling 171 mm (6.7 in) over approximately 18 days, accompanied by higher humidity levels at 90%. For more details on the weather variations, you can visit Gersau weather in December.
As September unfolds in Gersau, the weather offers a captivating transition from the warmth of summer to the crispness of autumn. With maximum temperatures reaching up to 25°C, the days still hold onto vestiges of summer, but the average drops to a cooler 13°C, inviting those cozy sweaters back into rotation. Notably, the presence of rain with about 15 days of precipitation can be felt, leading to a humidity level of 83% that often enhances the freshness in the air. This unique blend of warmth and moisture creates an enchanting atmosphere, making September a delightful time for exploration and reflection. For a deeper insight into how this month's weather compares to others, visit Gersau Climate.