Last updated: August 27, 2025
September in Zermatt, Switzerland, presents a captivating transition into autumn, with daily temperatures ranging from a chilly minimum of -7°C (20°F) to a comfortable maximum of 17°C (64°F). This month typically sees an average temperature of 6°C (44°F), setting the stage for brisk, invigorating days. Travelers should prepare for considerable rainfall, as Zermatt experiences approximately 116 mm (4.6 in) of precipitation over 19 days, often making the air crisp and refreshing. With humidity levels around 74%, September is a perfect time for nature enthusiasts to explore the breathtaking landscapes while enjoying the unique charm of this alpine retreat.
In September, Zermatt, Switzerland, experiences a notable shift towards cooler temperatures as summer transitions into autumn. The month begins with a crisp minimum of -7°C (20°F) and an average hovering around 6°C (44°F), providing a refreshing respite from the summer heat. With a maximum of 17°C (64°F), the weather remains pleasant for outdoor activities, yet the chill hints at the colder months to come. As the temperatures begin to decline from the milder summer months, September serves as an ideal time for adventurers and nature lovers to explore the stunning alpine landscapes before winter sets in, making it a perfect blend of vibrant autumn colors and inviting conditions.
In September, Zermatt experiences a significant transition in its climatic rhythm, with precipitation measuring 116 mm (4.6 in) over 19 days. This marks a noteworthy shift from the wet summer months, where rainfall peaks in August at 215 mm (8.4 in) and remains elevated into early autumn. As the region gradually cools, September’s precipitation mirrors that of January, both showcasing approximately 117 mm. However, with fewer rainy days in comparison to the early summer peaks, this month offers a more balanced experience of rain and respite. This trend underscores the gradual onset of autumn, as the lush greenery of the summer months begins to transition into the vibrant hues of fall.
As September arrives in Zermatt, Switzerland, the humidity makes a modest rebound, settling at 74% after the low of 64% seen in August. This subtle increase signals the end of summer's dry spell, yet it's still considerably lower than the dampness experienced in the winter months, where humidity hovers around 88%. Throughout the year, a clear trend emerges: humidity typically peaks in the colder months, with January and November showcasing the highest levels. Conversely, the summer months of June to August offer more comfortable conditions for outdoor activities, with July as the driest month at 67%. September strikes a balance, providing visitors with a pleasant atmosphere as the region transitions into the crispness of autumn.
As September rolls into Zermatt, Switzerland, the UV Index begins to moderate, standing at 7, which signifies a high level of solar radiation. While this is a slight decrease from the summer months, when the UV Index peaked at 11 in June, it still calls for precautions to prevent sunburn, with a burn time of 25 minutes for those unprotected. The transition from the intense summer rays towards a more moderate autumn sun is a notable trend; however, visitors should remain vigilant. As the month progresses, it's wise to embrace protective measures while enjoying the stunning alpine scenery. For detailed information on daily UV levels and recommendations, check out Zermatt UV Index.
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As autumn unfurls its colors, September in Zermatt, Switzerland brings a stunning blend of lingering summer warmth and the crispness of approaching winter. With 333 hours of sunshine, this month captures a beautiful transition from the sun-drenched days of July and August, which boast 425 and 393 hours respectively. The sunny glow begins to soften, as the days gradually shorten, yet there’s still plenty of bright moments to savor before the arrival of the more overcast months ahead. Following the peak of July, September stands out for its vibrant light, offering idyllic conditions for hiking amidst breathtaking alpine scenery. This seasonal shift not only highlights Zermatt's stunning landscapes but also invites visitors to revel in the beauty of a place where the sun shines just a little bit longer before winter takes hold.
In Zermatt, Switzerland, the likelihood of sunny weather shows a notable fluctuation throughout the year, with September recording a modest 23% chance of sunshine. This positions it among the lower percentages, notably lower than the summer months of July and August, which boast chances of 31% and 41%, respectively. As autumn approaches, the trend in sunny weather tends to decline, suggesting that while September may still offer some pleasant days, it often gives way to the cooler, cloudier conditions of fall. Interestingly, the chance of sun increases again in October to 44%, indicating a weather pattern that fluctuates considerably, inviting visitors to experience Zermatt's charm in varying conditions throughout the seasons.
As summer gently gives way to autumn in Zermatt, Switzerland, September brings a delightful shift in the day's rhythm, offering approximately 12 hours of daylight. This decline from the 15 hours enjoyed in the peak of summer signals the gradual shortening of days as nature prepares for winter's embrace. Following a steady increase from January’s 9 hours to July’s peak, the daylight hours begin to taper off in August and continue their descent into October. With vibrant fall colors emerging against the backdrop of the towering Alps, September invites both locals and visitors to bask in the golden rays while savoring the last vestiges of long, sunlit days.
As summer transitions into autumn in Zermatt, Switzerland, September brings a gentle whisper of wind, with an average speed of 1.1 m/s (2 mph), marking it as the calmest month of the year. This soothing breeze reflects a notable decline from the breezier months leading up to it, where the wind speeds hovered around 1.2 m/s (3 mph) during July and August. As the landscape shifts and the towering mountains start to don their fall colors, the tranquil winds invite visitors to embrace the serene beauty of this Alpine paradise. The rise in wind speed seen in October to 1.4 m/s (3 mph) suggests a gradual reawakening, hinting at the briskness that comes with the approach of winter. Overall, September’s mellow winds embody a tranquil pause, setting the stage for the vibrant changes of the season to come.
Weather in Zermatt varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Zermatt, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions, showcasing the transition from autumn to winter. September has a more moderate temperature range, with minimums around -7°C (20°F), averaging 6°C (44°F), and maximums reaching up to 17°C (64°F). It experiences considerable rainfall, totaling 116 mm (4.6 in) over approximately 19 days, and a humidity level of 74%.
In stark contrast, January is characterized by much colder temperatures, with a minimum of -27°C (-17°F), an average of -11°C (12°F), and a maximum of just 1°C (34°F). Although it has a similar precipitation total of 117 mm (4.6 in), it falls over only 10 days, accompanied by a higher humidity of 88%. For more details on January weather, you can check Zermatt weather in January.
September and February present starkly contrasting weather conditions. In September, temperatures range from a chilly minimum of -7°C (20°F) to a pleasant maximum of 17°C (64°F), with an average of 6°C (44°F). This month sees a significant amount of precipitation, totaling 116 mm (4.6 in) over 19 days, while the humidity hovers around 74%. In contrast, February is much colder, with temperatures dipping as low as -26°C (-14°F) and averaging -8°C (18°F), peaking at just 7°C (45°F). The month experiences less rainfall, only 66 mm (2.6 in) over 11 days, and a higher humidity level of 81%. For more details on the February weather in Zermatt, visit Zermatt weather in February.
September and March showcase a stark contrast in weather conditions. In September, temperatures range from a minimum of -7°C (20°F) to a maximum of 17°C (64°F), with an average of 6°C (44°F). The month experiences considerable precipitation, totaling 116 mm (4.6 in) over 19 days, with humidity levels around 74%. In contrast, March is notably colder, with temperatures dipping as low as -29°C (-19°F) and averaging -6°C (22°F), peaking at 9°C (48°F). Although it receives slightly less precipitation at 105 mm (4.2 in) over 14 days, humidity increases to 76%. For those looking to explore the nuances of weather in March, additional details can be found at Zermatt weather in March.
When comparing the weather in September and April, significant differences emerge. September generally presents milder temperatures, with a minimum of -7°C (20°F) and an average of 6°C (44°F), peaking at a comfortable 17°C (64°F). In contrast, April is colder, starting with a minimum of -16°C (3°F) and an average of -2°C (30°F), with a maximum of only 11°C (52°F). Precipitation is slightly higher in April at 135 mm (5.3 in) over 12 days, compared to September's 116 mm (4.6 in) across 19 days. Additionally, humidity levels are marginally higher in April at 77%, compared to September's 74%. For more detailed insights on April weather, you can check Zermatt weather in April.
September and May in Zermatt offer contrasting experiences in terms of weather. September typically sees milder temperatures with averages around 6°C (44°F) and a maximum of 17°C (64°F), while May presents a cooler climate with average temperatures of 2°C (37°F) and a maximum of 15°C (58°F). Precipitation is more pronounced in May, totaling 180 mm (7.1 in) over about 20 days, compared to September, which receives 116 mm (4.6 in) over 19 days. Both months share similar humidity levels of 74%, but September’s warmer conditions make it the more comfortable choice for outdoor activities. For a detailed look at the weather specifics in May, you can visit Zermatt weather in May.
The weather in September contrasts with that of June, showcasing a notable shift in temperature and precipitation patterns. In September, the average temperature is around 6°C (44°F), with a maximum of 17°C (64°F), while June enjoys warmer conditions, with averages at 8°C (47°F) and peaks reaching 23°C (74°F). Precipitation is more pronounced in June, accumulating to 210 mm (8.3 in) over 21 days compared to September's 116 mm (4.6 in) over 19 days. Despite this, the humidity levels remain fairly comparable, with September at 74% and June slightly lower at 71%. For more detailed information, you can refer to Zermatt weather in June.
September weather typically features a broader range of temperatures than July, with minimums dropping to -7°C (20°F) and maximums reaching 17°C (64°F). In contrast, July experiences slightly milder temperatures, with minimums at -1°C (30°F) and maximums at 20°C (69°F). Precipitation is also a notable difference; September records 116 mm (4.6 in) over 19 days, while July sees a higher total of 187 mm (7.3 in) over 21 days. Additionally, the humidity in September averages around 74%, compared to July's 67%, contributing to a more damp feel as the season transitions. For more detailed information, you can check Zermatt weather in July.
September's weather presents a noticeable transition from August, with average temperatures dropping from 10°C (50°F) to 6°C (44°F). The minimum temperatures in September, dipping to -7°C (20°F), contrast starkly with August's milder minimum of -1°C (30°F). Additionally, while September experiences slightly less precipitation at 116 mm (4.6 in) over 19 days compared to August's 215 mm (8.4 in) over 21 days, the humidity rises from 64% in August to 74% in September, contributing to a more overcast atmosphere. For more insights on this month's climate, you can check Zermatt weather in August.
In September, temperatures range from a chilly -7°C (20°F) at night to a mild 17°C (64°F) during the day, with an average of 6°C (44°F). The month experiences significant rainfall, totaling 116 mm (4.6 in) over 19 days, while humidity levels remain at 74%. In contrast, October brings colder conditions, with minimum temperatures dropping to -13°C (8°F) and a daily maximum of 13°C (56°F), averaging around 2°C (35°F). Precipitation increases to 193 mm (7.6 in), occurring over fewer days—just 13—resulting in heightened humidity at 87%. For a more detailed outlook on the weather during this month, visit Zermatt weather in October.
September and November exhibit notable differences in weather conditions. In September, temperatures range from a minimum of -7°C (20°F) to a maximum of 17°C (64°F), with an average of 6°C (44°F), and the month sees about 116 mm (4.6 in) of precipitation over 19 days with a humidity level of 74%. In contrast, November experiences much colder temperatures, with a minimum of -24°C (-11°F) and a maximum of 9°C (49°F), averaging -5°C (24°F). Precipitation increases to 167 mm (6.6 in) over 16 days, accompanied by higher humidity at 88%. For more details on this month's weather specifics, you can refer to Zermatt weather in November.
In September, the weather in Zermatt is relatively mild, with average temperatures ranging from a chilly minimum of -7°C (20°F) to a comfortable maximum of 17°C (64°F). The month experiences a moderate level of precipitation at 116 mm (4.6 in) over 19 days, paired with a humidity level of 74%. In contrast, December brings much colder conditions, with temperature lows plunging to -26°C (-14°F) and an average of -10°C (14°F), peaking at just 2°C (36°F). December also sees slightly higher precipitation at 145 mm (5.7 in) across 16 days, along with increased humidity at 85%. For more detailed insights, check out Zermatt weather in December.
As September unfolds in Zermatt, the weather contrasts notably with the preceding summer months. Temperatures begin to drop, offering a crisp, refreshing atmosphere that invites exploration. While bright sunny days still grace the region, the increasing likelihood of rainfall—evidenced by nearly two-thirds of the month experiencing precipitation—marks the transition towards autumn. Humidity levels also rise, creating a distinctive chill in the air that can catch visitors off guard. For those planning a trip, understanding these seasonal shifts is key to fully embracing the charm of Zermatt in September. Explore more about the unique climate of this enchanting destination here: Zermatt Climate.