Last updated: August 27, 2025
In September, Ilanz, Switzerland experiences a refreshing climate characterized by a maximum temperature of 21°C (70°F) and an average of 9°C (48°F), dipping to a chilly minimum of -10°C (15°F) at night. This month sees 152 mm (6.0 in) of rainfall spread over approximately 15 days, contributing to the region's lush greenery. With an average humidity of 83%, the air feels pleasantly crisp, making it an ideal time for visitors to explore the stunning landscapes and embrace the serene beauty of this picturesque Swiss town.
In September, Ilanz, Switzerland begins to transition from summer warmth to the cooler embrace of autumn. With temperatures ranging from a minimum of -10°C (15°F) to a comfortable maximum of 21°C (70°F), it showcases a moderate average of 9°C (48°F), offering a refreshing change from the summer heat. This month serves as a bridge where the crispness in the air hints at the imminent winter, yet remnants of warmth still linger, creating the perfect backdrop for outdoor activities and breathtaking autumn scenery. As the days grow shorter and the leaves begin to turn, visitors can experience the enchanting charm of this Swiss town in a season that beautifully straddles the edge of two worlds.
In September, Ilanz, Switzerland experiences a significant shift in its weather patterns, with precipitation reaching 152 mm (6.0 in) over 15 rainy days. This marks a return to more substantial rainfall following August's peak of 234 mm (9.2 in), showcasing a distinctly wet late summer that sets the stage for autumn. The overall trend suggests September is a month of transition, as the lush greenery from late summer begins to yield to the crispness of fall, with rainfall levels returning to those seen earlier in the spring. Despite the dip from August, September's precipitation remains robust, underscoring a regional climate that thrives on moisture as it prepares for the cooler months ahead.
As September unfolds in Ilanz, Switzerland, the humidity settles at a comfortable 83%, reflecting a slight uptick from August's 80%. This transitional month signals the gradual shift from the warmer summer months into the cooler embrace of autumn. While September's levels are notably lower than the frigid January humidity of 92%, they align closely with the mid-year trend seen in July and June, where the humidity hovered around 82-83%. As the year progresses, a notable increase in humidity is anticipated in October, returning to the typical winter figures, foreshadowing the lush, damp conditions that characterize Ilanz's colder months.
As summer fades into autumn, September in Ilanz, Switzerland presents a transition in UV exposure, hovering at a UV Index of 7—indicating a high exposure category. While this marks a decline from the peak of 10 experienced in the heart of July, the burn time remains brisk at 25 minutes, reminding residents and visitors alike to remain vigilant about sun protection. This pattern reflects a gradual decrease in UV intensity as the year progresses, after several months of very high levels during the summer. With the cooler months approaching, make sure to stay informed about these changes and enjoy the beautiful autumn days responsibly. For more detailed updates, check out the Ilanz UV Index.
UV Risk Categories
September in Ilanz, Switzerland, wraps up the sun-soaked summer with 302 hours of brilliant sunshine, a fitting transition from the peak hours of July's 404 hours. As autumn begins to unfold, days gradually shorten, yet September's light still offers a generous blend of warmth and brightness, clearly reflecting the lingering summer vibes. While the month sees a drop in sunlight, it remains significantly brighter than the winter months, which can plunge to as low as 169 hours in January. This natural ebb and flow of sunlight throughout the year not only highlights Ilanz's stunning climatic diversity but also invites visitors to savor the beauty of late summer's golden glow before the cooler days ahead.
In September, Ilanz, Switzerland enjoys a 33% chance of sunny weather, marking a slight uptick from the summer months. The transition into autumn brings a noticeable change, as the likelihood of sunshine rises above the summer averages observed in July and August, both at 27%. This gradual improvement reflects a shift in weather patterns as the region bids farewell to the warmer months and prepares for the cooler season ahead. While September does not guarantee clear skies, outdoor enthusiasts can take comfort in the relatively favorable conditions compared to earlier months, making it a delightful time to explore the picturesque Swiss landscape.
As summer gives way to autumn in Ilanz, Switzerland, September marks a gentle transition in daylight hours, with the sun gracing the sky for approximately 12 hours each day. This decline reflects a gradual tapering from the 15 hours of daylight enjoyed in the peak of summer, offering a sense of balance as the summer warmth wanes. The shortening days not only remind residents of the impending chill of winter but also provide a stunning backdrop for enjoying the vibrant hues of the changing leaves. As daylight continues to recede into October, the rhythm of nature encourages a slower pace, inviting reflection and appreciation for the year’s remaining warmth.
In September, the winds in Ilanz, Switzerland, whisper gently through the valleys, with an average speed of 1.1 m/s (2 mph). This reflects a subtle trend towards calmer conditions as the summer days give way to the crispness of autumn. Notably, September's breezes mirror those of August, both registering the lowest wind speeds of the year. This serene stillness, coupled with the soft hues of fall foliage, creates a tranquil atmosphere that invites both locals and visitors to relish the peaceful transition into the cooler months ahead. As the year progresses into October, we can expect a slight revival in wind activity, with speeds picking up once again to 1.4 m/s (3 mph), reminding us of nature's ever-changing rhythm.
Weather in Ilanz varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ilanz, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present markedly different weather conditions. In September, temperatures range from a chilly -10°C (15°F) at night to a comfortable maximum of 21°C (70°F) during the day, with an average of 9°C (48°F). This month sees significant precipitation, totaling 152 mm (6.0 in) over about 15 days, accompanied by 83% humidity. In sharp contrast, January brims with cold, where temperatures dip between -26°C (-15°F) and a maximum of only 6°C (44°F), averaging -8°C (19°F). Precipitation during January is lower at 107 mm (4.2 in) over approximately 11 days, but the humidity is higher at 92%. For more detailed information about weather conditions during January, visit Ilanz weather in January.
September and February present contrasting weather patterns. September experiences milder temperatures, ranging from a minimum of -10°C (15°F) to a maximum of 21°C (70°F), with an average of 9°C (48°F). The month sees significant precipitation, totaling 152 mm (6.0 in) over about 15 days, and boasts a humidity level of 83%. In contrast, February is much colder, with temperatures dipping as low as -24°C (-11°F) and peaking at only 9°C (48°F), resulting in an average of -4°C (25°F). Precipitation is lower at 73 mm (2.9 in) over 12 days, and humidity slightly increases to 89%. For more detailed insights into February conditions, you can refer to the following link: Ilanz weather in February.
In comparing the weather of September and March, it’s evident that September enjoys milder conditions with average temperatures around 9°C (48°F), peaking at 21°C (70°F) and experiencing relatively high humidity at 83%. In contrast, March is significantly colder, featuring an average temperature of -2°C (29°F) and maximums reaching only 13°C (56°F), with a lower but more frigid minimum of -24°C (-11°F). Despite March receiving slightly less precipitation at 109 mm (4.3 in) over 16 days, it shares a similar frequency of rainy days with September, which sees 152 mm (6.0 in) across 15 days. For those curious about conditions in March, detailed information can be found at Ilanz weather in March.
September and April present contrasting weather conditions. In September, temperatures range from a chilly minimum of -10°C (15°F) to a comfortable average of 9°C (48°F), peaking at 21°C (70°F). The month sees substantial precipitation of 152 mm (6.0 in) over 15 days, resulting in a relatively humid atmosphere with an average humidity of 83%. In contrast, April experiences colder temperatures, with a minimum of -21°C (-6°F) and an average of 2°C (35°F), reaching a maximum of only 15°C (60°F). Despite being slightly less wet than September, April still records 95 mm (3.7 in) of precipitation over 13 days, with humidity levels closely mirroring September at 84%. For a detailed look at April weather, you can visit Ilanz weather in April.
In comparing the weather of September and May, we see some interesting contrasts despite their relatively close temperatures. September boasts a slightly warmer average of 9°C (48°F), with maximum temperatures reaching 21°C (70°F), while May features a lower average of 6°C (43°F) and a maximum temperature of 22°C (72°F). Both months experience significant precipitation, with September receiving 152 mm (6.0 in) over 15 days, and May slightly less at 150 mm (5.9 in) but over 21 days, indicating a generally wetter feel in May. Additionally, humidity levels are comparable; September has 83%, while May holds at 80%. For a detailed look at May weather specifically, you can check Ilanz weather in May.
September and June showcase distinct weather patterns, highlighting a transition between seasons. In September, temperatures range from a chilly -10°C (15°F) at night to a mild 21°C (70°F) during the day, with an average of 9°C (48°F). In contrast, June offers a warmer climate, with temperatures fluctuating between -2°C (29°F) and a comfortable 27°C (82°F), averaging 11°C (53°F). Both months experience significant precipitation, with September receiving 152 mm (6.0 in) over 15 days, while June sees slightly more at 158 mm (6.2 in) over 19 days. Humidity levels are comparably high, with September at 83% and June at 82%. For more detailed insights into June weather specifically, you can refer to Ilanz weather in June.
In comparing the weather between September and July, September experiences cooler temperatures overall, with a minimum of -10°C (15°F) and an average of 9°C (48°F), while July has warmer temperatures, ranging from a minimum of 3°C (38°F) to an average of 12°C (55°F). July also sees higher maximum temperatures, reaching up to 27°C (80°F), compared to September's maximum of 21°C (70°F). Precipitation is more frequent in July, occurring over 20 days and totaling 180 mm (7.1 in), compared to September's 152 mm (6.0 in) over 15 days. Interestingly, both months share the same level of humidity at 83%. For a closer look at July's weather, you can visit Ilanz weather in July.
In comparing the weather between September and August, September typically presents cooler temperatures, with a minimum of -10°C (15°F) and an average of 9°C (48°F), whereas August enjoys milder conditions, with a minimum of 1°C (35°F) and an average of 12°C (54°F). The maximum temperatures also reflect this difference, reaching only 21°C (70°F) in September compared to 24°C (76°F) in August. Additionally, September sees a higher level of precipitation, totaling 152 mm (6.0 in) over 15 days, compared to August’s 234 mm (9.2 in) on 20 days, which indicates a slightly wetter month but with fewer rainy days overall. Humidity levels remain relatively high in both months, at 83% in September and 80% in August, making the air feel quite moist. For more detailed insights about the weather during August, you can check Ilanz weather in August.
In September, the weather displays a mild range with minimum temperatures dropping to -10°C (15°F) and averaging around 9°C (48°F), peaking at a comfortable 21°C (70°F). The month experiences significant rainfall, totaling 152 mm (6.0 in) over 15 days, accompanied by a humidity level of 83%. In contrast, October brings slightly cooler temperatures with a minimum of -8°C (18°F) and an average of 5°C (40°F), reaching a maximum of 17°C (62°F). Precipitation levels remain similar at 153 mm (6.0 in), but the number of rainy days decreases to 12, and humidity rises to 90%. For more detailed insights into October's weather, you can check Ilanz weather in October.
In September, the weather is relatively mild, with temperatures ranging from a minimum of -10°C (15°F) to a maximum of 21°C (70°F), and an average of 9°C (48°F). The month experiences considerable precipitation, totaling 152 mm (6.0 in) over approximately 15 days, coupled with a humidity level of 83%.
In contrast, November brings colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 13°C (56°F), averaging around -1°C (30°F). Although it sees slightly less precipitation at 108 mm (4.3 in) over 13 days, the humidity increases to 88%. These changes mark a distinct transition from the relatively warmer September to the chillier November months. For more detailed information about November weather, you can check Ilanz weather in November.
In September, temperatures are milder, ranging from a minimum of -10°C (15°F) to a maximum of 21°C (70°F), with an average of 9°C (48°F), contributing to a pleasantly cool climate. The month experiences considerable rainfall, totaling 152 mm (6.0 in) over about 15 days, and humidity sits at a comfortable 83%. In contrast, December's weather is significantly colder, with temperatures plunging to a minimum of -25°C (-13°F) and only reaching a maximum of 6°C (43°F), averaging -6°C (22°F). Although precipitation is slightly lower at 145 mm (5.7 in) over 18 days, the humidity increases to 90%, making the air feel even colder. For a detailed look at December weather, you can visit Ilanz weather in December.
As September unfolds in Ilanz, the weather begins to shift dramatically from the warm summer months. With an average temperature of 9°C (48°F), the crisp air heralds the arrival of autumn. Unlike the balmy days of July and August, September often experiences more variability, with maximums reaching about 21°C (70°F) and chilling lows dipping down to -10°C (15°F). This month is marked by an increase in precipitation, averaging 152 mm (6.0 in) over 15 days, making it one of the wetter periods in the year and fostering an atmosphere of vibrant fall foliage. The humidity level hovers around 83%, creating a rich tapestry of weather that beautifully contrasts with the drier summer months. For those looking to explore seasonal changes, more details can be found at Ilanz Climate.