Last updated: August 27, 2025
Experience the delightful September weather in Zurich, Switzerland, where temperatures typically range from a refreshing minimum of 5°C (41°F) to a pleasant maximum of 28°C (83°F), averaging around 16°C (60°F). This month embraces a mix of mild days and cooler evenings, ideal for exploring the city's picturesque landscapes. With 104 mm (4.1 in) of rainfall spread over 11 days, visitors should be prepared for occasional showers, though the 83% humidity often brings a crisp freshness to the air. Embrace the charm of Zurich in September, where autumn whispers its arrival amidst vibrant city life.
As September unfolds in Zurich, the city experiences a delightful transition into autumn, with temperatures ranging from a mild 5°C (41°F) to a cozy 28°C (83°F). The average temperature settles at a comfortable 16°C (60°F), making it an ideal time for outdoor activities and exploration. Compared to the sweltering heights of summer, the weather in September offers a refreshing reprieve, with the hot days of August giving way to crisp, cool evenings. This month serves as a bridge to the cooler autumn months, encouraging locals and visitors alike to enjoy the parks and lakesides before the chill sets in, highlighting the delightful charm of Zurich as it prepares for the colorful fall foliage ahead.
In September, Zurich experiences a notable transition as summer wanes, marked by an average precipitation of 104 mm (4.1 in) spread over 11 days. This month showcases a slight reduction in rainfall compared to the preceding summer months, with August recording 141 mm. However, September's precipitation levels are still substantial, reflecting the city's characteristic autumnal weather. As the days grow shorter and cooler, the frequency of showers shifts patterns, serving as a precursor to the wetter months ahead in October and December. Overall, this month strikes a balance, offering a mix of rain and clearer days, making it a perfect time for those who enjoy the invigorating crispness of early autumn in Zurich.
As summer fades, September in Zurich welcomes a notable shift in humidity, averaging 83%—a slight increase from August's 80%. This gentle rise continues the trend of transitioning from the drier summer months into the wetter autumn season. Although September's humidity is lower than the peak levels experienced in January (92%) and October (90%), it aligns closely with the year’s overall pattern, where humidity typically peaks in the late autumn and winter. With these atmospheric changes, Zurich prepares for the crispness of fall, while still holding on to the lingering warmth of summer.
As September unfolds in Zurich, Switzerland, the UV Index settles at a moderate level of 6, which translates to a high exposure category. With a burn time of 25 minutes, this month offers a notable shift from the intense summer months, where UV Index readings peaked at 9. While the sun is still strong enough to warrant caution, especially for those planning outdoor activities, the slightly lower index suggests a transition toward cooler autumn days. Staying informed about the UV Index is essential, as it helps residents and visitors alike to enjoy the stunning early fall scenery while protecting their skin. For more information on UV levels throughout the year, visit Zurich UV Index.
UV Risk Categories
As summer draws to a close, September brings a delightful blend of warmth and sunshine to Zurich, with an impressive 320 hours of sunlight. While basking under the sun, residents and visitors can reflect on the steady increase of daylight that has graced the city from the start of the year. January begins with just 164 hours, but each subsequent month reveals a gradual ascent, peaking in July with a remarkable 415 hours. Although September signals the onset of autumn, the sunlight still lingers pleasantly, providing a vibrant transition before the shorter days of October, which offers 279 hours. This trend showcases Zurich's picturesque evolution through the seasons, inviting everyone to savor the last traces of summer in a city that shines in nature's warm embrace.
In Zurich, Switzerland, the likelihood of sunny weather in September stands at 41%, marking a notable increase compared to the earlier summer months. This uptick indicates a shift towards clearer skies as the city transitions into autumn, capturing the last vestiges of summer sunshine. Interestingly, while September's chances outshine those of July and August, which hover around the mid-30% range, it also reflects a gradual decline from the peak potential seen in the spring months, with April offering a promising 49%. Overall, September presents an enticing opportunity for sun-seekers, blending the remnants of summer warmth with the crispness of fall, making it a delightful time to explore Zurich.
In Zurich, Switzerland, September marks a noticeable transition in daylight hours as summer gracefully yields to autumn. After enjoying 15 hours of daylight during the peak of summer in June and July, the daylight begins to wane, settling at 12 hours by September. This gradual decrease is a part of the rhythmic seasonal shift, reflecting a decline from the brighter and longer days of earlier months. As the city prepares for shorter days ahead, September offers a balanced mix of light, allowing residents and visitors to savor the last remnants of summer's brightness before the days grow shorter in October and beyond.
As summer gracefully gives way to autumn, September in Zurich sees the wind slow down a notch, with an average speed dipping to 1.4 m/s (3 mph). This marks a notable decline from the breezier months of May through July, where winds were consistently around 2.1 m/s (5 mph) or slightly below. The gentle whispers of September winds invite a serene transition, as the city prepares for the colorful embrace of falling leaves. While the air may be calmer this month, the shifting patterns remind us of nature's rhythm, signaling an approach to the cooler days ahead.
Weather in Zurich varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Zurich, focusing on differences in temperature, rainfall, humidity, and UV levels.
September in Zurich sees a mild transition from summer to autumn, with average temperatures ranging from a cool 5°C (41°F) to a pleasant 28°C (83°F). This month experiences about 104 mm (4.1 in) of precipitation over approximately 11 days, coupled with a relatively high humidity of 83%. In contrast, January brings a stark shift, with temperatures plummeting to a minimum of -11°C (13°F) and averaging just 1°C (35°F), peaking at 15°C (59°F). This winter month records slightly higher precipitation at 112 mm (4.4 in) across 12 days, along with increased humidity at 92%. For more details on January weather conditions, visit Zurich weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 28°C (83°F), with an average of 16°C (60°F). It is generally a month marked by warm days and high humidity at 83%, coupled with 104 mm (4.1 in) of precipitation over about 11 days. In comparison, February experiences much colder temperatures, with a minimum of -12°C (10°F) and a maximum of 18°C (65°F), averaging just 4°C (39°F). Although it has slightly lower precipitation at 87 mm (3.4 in), it still sees rain or snow on 11 days, along with a higher humidity of 89%. For more detailed information, check Zurich weather in February.
When comparing the weather in September and March, there are notable differences. September boasts milder temperatures, with a minimum of 5°C (41°F) and an average of 16°C (60°F), reaching a maximum of 28°C (83°F). In contrast, March experiences much cooler conditions, with a minimum of -11°C (13°F) and an average temperature of 6°C (43°F), peaking at 20°C (69°F). Additionally, precipitation levels are relatively similar, with September receiving 104 mm (4.1 in) over 11 days and March having 100 mm (3.9 in) spread across 16 days. Humidity is slightly higher in March at 87% compared to September's 83%. For a more detailed look at March weather, you can visit Zurich weather in March.
When comparing the weather in September and April, notable differences emerge. September generally experiences milder temperatures, with minimums around 5°C (41°F) and averages reaching up to 16°C (60°F), while April has colder minimums of -3°C (26°F) and a lower average of 10°C (50°F). Both months see a similar number of precipitation days, with September receiving 104 mm (4.1 in) and April slightly less at 77 mm (3.0 in). Humidity levels are comparable, with September at 83% and April slightly higher at 84%. For more detailed insights on April weather, refer to Zurich weather in April.
September and May offer distinct weather experiences, showcasing the transition between seasons. In September, temperatures range from a pleasant 5°C (41°F) to a warm 28°C (83°F), with an average of 16°C (60°F) and relatively high humidity at 83%. While experiencing 104 mm (4.1 in) of precipitation over approximately 11 days, the weather is generally mild.
In contrast, May sees cooler minimum temperatures, dipping to -2°C (29°F), while highs can reach 30°C (86°F). The average temperature is lower at 13°C (56°F), accompanied by slightly more rainfall of 137 mm (5.4 in) spread across 16 days, and humidity at 80%. This comparison highlights the shifting climate, making September a transition towards warmth and May a precursor to the summer heat. For more detailed information, you can check Zurich weather in May.
In comparing the weather of September and June, it's clear that both months experience mild temperatures, but June tends to be warmer overall. September features a minimum temperature of 5°C (41°F) and an average of 16°C (60°F), with a maximum reaching 28°C (83°F). In contrast, June has slightly higher temperatures with a minimum of 6°C (43°F) and an average of 18°C (65°F), peaking at a warmer 34°C (93°F). Precipitation is more prominent in June as well, with 149 mm (5.9 in) falling over 16 days compared to September's 104 mm (4.1 in) over 11 days. Humidity levels are similar, with September at 83% and June slightly lower at 82%. For more detailed insights, you can check Zurich weather in June.
In comparing the weather between July and September, it’s clear that July tends to be warmer overall. With temperatures averaging around 20°C (68°F) and peaking at 34°C (94°F), July experiences significantly higher warmth compared to September's average of 16°C (60°F) and maximum of 28°C (83°F). Additionally, July sees more rainfall, with 134 mm (5.3 in) of precipitation over 16 days, while September has 104 mm (4.1 in) and 11 rainy days. Both months share a similar humidity level of 83%, creating a humid atmosphere, but the overall warmth and rainfall make July feel more tropical. For more specific details about July weather, you can visit Zurich weather in July.
In comparing the weather of September and August, one can observe notable differences in temperature and precipitation. September experiences a wider range of temperatures, with a minimum of 5°C (41°F) and a maximum of 28°C (83°F), averaging at 16°C (60°F). In contrast, August is generally warmer, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 34°C (93°F), and an average of 20°C (67°F). Additionally, September sees 104 mm (4.1 in) of precipitation over 11 days, while August has higher rainfall at 141 mm (5.6 in) across 14 days. The humidity levels are slightly higher in September at 83%, compared to 80% in August. For more specific details about the weather in August, you can visit Zurich weather in August.
September weather is generally milder, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 28°C (83°F) and an average of 16°C (60°F). During this month, precipitation is moderate at 104 mm (4.1 in) over about 11 days, with humidity levels at 83%. In contrast, October brings cooler temperatures, with a minimum of 2°C (35°F) and a maximum of 23°C (73°F), leading to an average temperature of 11°C (52°F). The month is slightly wetter, with 122 mm (4.8 in) of rainfall occurring over 13 days, and higher humidity at 90%. For more detailed information, check out Zurich weather in October.
September weather in Zurich is characterized by warmer temperatures, with averages around 16°C (60°F) and a maximum reaching up to 28°C (83°F). This month also sees significant rainfall, totaling 104 mm (4.1 in) over about 11 days, coupled with a humidity level of 83%. In contrast, November brings a noticeable chill, with average temperatures dropping to 6°C (43°F) and nighttime lows dipping to -1°C (30°F). Although November experiences slightly less precipitation, at 76 mm (3.0 in) over 12 days, the higher humidity at 88% can make the cold feel more intense. For more details on what to expect, check out Zurich weather in November.
In September, temperatures in Zurich range from a mild minimum of 5°C (41°F) to a warm maximum of 28°C (83°F), with an average of around 16°C (60°F). The month experiences about 104 mm (4.1 inches) of precipitation over 11 days, and humidity sits at a comfortable 83%. Conversely, December brings a significant drop in temperatures, with lows of -5°C (23°F) and a maximum of only 14°C (57°F), averaging just 3°C (38°F). The precipitation increases to 136 mm (5.4 inches) spread over 19 days, and humidity rises to 90%. For more detailed information, you can check Zurich weather in December.
As summer transitions to autumn, September in Zurich brings a delightful shift in weather, offering visitors a unique blend of warm and cool days. With an average temperature of 16°C (60°F), the month showcases pleasant afternoons perfect for outdoor exploration, contrasted by cooler nights that remind us summer is waning. While September enjoys occasional rains, totaling around 104 mm of precipitation, it also provides ample opportunities to bask in the crisp, refreshing air typical of early fall. With humidity levels reaching 83%, this month is distinctly different from the drier summer months, setting the stage for colorful autumn foliage. For a deeper understanding of what to expect throughout the year, check out the Zurich Climate.