Last updated: August 27, 2025
In September, Bellinzona, Switzerland experiences a delightful blend of early autumn crispness and mild warmth. Average temperatures hover around 13°C (56°F), reaching a pleasant maximum of 23°C (75°F) during the day, while cooler nights can dip to a brisk minimum of -1°C (30°F). Although the month welcomes the transition with an average humidity of 83%, it also witnesses a fair amount of precipitation, totaling 126 mm (4.9 in) over 13 days. This combination of elements creates a beautiful backdrop for enjoying the stunning landscapes of the region, making September a charming time to visit Bellinzona.
As September rolls into Bellinzona, Switzerland, the temperatures begin to reflect the transition from summer to autumn. With minimums dipping to a chilly -1°C (30°F) and averages settling at a comfortable 13°C (56°F), the month signals a gradual cool-down. The maximum temperature reaches a pleasant 23°C (75°F), allowing for those last few golden days of outdoor enjoyment. Compared to the warmer summer months of July and August, September offers a refreshing balance, blending the tail end of warmth with the crispness of fall. This shift heralds the arrival of cozy sweaters and the vibrant hues of autumn leaves, making it a picturesque time to experience the beauty of Bellinzona.
In September, Bellinzona experiences a notable shift in precipitation patterns, with an average of 126 mm (4.9 in) of rainfall spread over 13 days. This marks a subtle drop from the much wetter August, which recorded 160 mm (6.3 in) across just 13 days. Notably, while July and August are typically more humid and rank among the wettest months, September maintains a significant precipitation level, suggesting the onset of autumn is accompanied by continual moisture. Following this trend, October escalates the rainfall again, bringing an estimated 185 mm (7.3 in). Overall, September serves as a transitional period, balancing the summer's intensity while hinting at the heavier rainfall to come in the following weeks.
In September, Bellinzona experiences a slight uptick in humidity, averaging 83%, which is consistent with the prevalent trends observed in late summer. Following the relatively drier months of July and August, where humidity dipped to 83% and 80%, September serves as a transition, nudging back towards the higher levels typical of autumn. This pattern establishes a gradual increase toward the wetter months ahead, notably with October and November resuming higher humidity of 90% and 88% respectively. As the days grow shorter and cooler, the air retains more moisture, making September an intriguing bridge between summer and the impending fall.
As September unfolds in Bellinzona, Switzerland, the UV Index registers a high level of 7, accompanied by a burn time of 25 minutes. This marks a noticeable decline from the peak summer months where the Index soared to 10, indicating very high exposure risk. While September's UV levels reflect a shift back towards more moderate conditions, they still warrant vigilance, especially for those enjoying outdoor activities. The trend of decreasing UV exposure continues into October with an Index of 5, emphasizing the importance of adapting sun protection measures as autumn approaches. For more detailed insights on UV trends throughout the year, check out the complete guide at Bellinzona UV Index.
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September in Bellinzona, Switzerland, is a delightful blend of warmth and sunshine, with 302 hours of daylight that signal the tail end of summer. As the year progresses, we witness a consistent increase in sunny hours from January's modest 174 hours to July's peak of 404 hours. While August sees a slight decline to 362 hours, September maintains a commendable amount of sunshine, bridging the transition to autumn. This trend of ample sunshine continues into early fall, offering residents and visitors alike a chance to bask in the lingering warmth before the shorter days of fall descend. With daylight gradually fading into October's 265 hours, September stands as a reminder of summer's last hurrah in this enchanting Swiss locale.
In Bellinzona, Switzerland, September sees a sunshine likelihood of 38%, which aligns closely with the summer months of July and August but indicates a subtle decline as autumn approaches. After a peak in March at 59%, the chances of sunny days fluctuate throughout the year, demonstrating a clear pattern of warmth and light in the spring and early summer before tapering off with the arrival of fall. While September still offers some pleasant weather, it's wise to prepare for a mix of sun and clouds as the region transitions into the cooler months.
In Bellinzona, Switzerland, the transition into September marks a noticeable shift in daylight hours, as the city enjoys about 12 hours of sunlight—a gentle decline from the peak of 15 hours during the summer months of June and July. This adjustment reflects the natural rhythm of the seasons, with September providing a balance between vibrant late-summer days and the shorter, cozy evenings that herald the arrival of autumn. As the days gradually wane towards October, the feeling of an impending seasonal change becomes palpable, inviting residents and visitors alike to savor the last warm rays of sunshine before the daylight dips to 10 hours. The progression of daylight durations not only sets the tone for the changing landscape but also influences the activities that characterize this enchanting period in the Swiss region.
As the summer warmth begins to wane in Bellinzona, September ushers in a gentle breeze, with average wind speeds dropping to a calm 1.1 m/s (2 mph). This subtle shift marks a transition from the more invigorating winds of the preceding months, which maintained a steady pace around 1.2 m/s (3 mph). In fact, September's softness is part of a broader trend, as the region sees its lowest wind speeds following a summer of mild yet consistent airflow, hinting at the tranquility that autumn brings. With the days becoming shorter and cooler, the serene atmosphere characterizes this time of year, inviting residents and visitors alike to embrace the peaceful charm that envelops Bellinzona in early fall.
Weather in Bellinzona varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bellinzona, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a pleasant maximum of 23°C (75°F), with an average of 13°C (56°F). The month experiences relatively high humidity at 83% and notable precipitation, totaling 126 mm (4.9 in) across about 13 days. In stark contrast, January is much colder, with temperatures dropping to a minimum of -16°C (3°F) and an average of -1°C (30°F), peaking at just 9°C (49°F). This month sees less precipitation at 58 mm (2.3 in) over 9 days but exhibits higher humidity at 92%. For a more detailed look, visit Bellinzona weather in January.
September and February present strikingly different weather conditions. September boasts milder temperatures, with a minimum of -1°C (30°F) and an average of 13°C (56°F), reaching a maximum of 23°C (75°F). It also experiences higher precipitation at 126 mm (4.9 in) over about 13 days, coupled with a relatively lower humidity of 83%. In contrast, February is significantly colder, featuring a minimum temperature of -16°C (3°F) and an average of just 1°C (34°F), while the maximum reaches 17°C (64°F). Despite the cold, February has less precipitation—54 mm (2.1 in) over 10 days—and a slightly higher humidity level of 89%. For more insights, you can explore Bellinzona weather in February.
In September, temperatures typically range from a chilly -1°C (30°F) at night to a pleasant high of 23°C (75°F) during the day, with an average temperature of 13°C (56°F). The month experiences significant rainfall, totaling 126 mm (4.9 in) over 13 days, along with high humidity levels at 83%. In contrast, March is much colder, with nighttime lows dropping to -17°C (2°F) and daytime highs peaking at 18°C (65°F), averaging around 3°C (38°F). Although precipitation is less at 93 mm (3.7 in) over 11 days, the humidity remains relatively high at 87%. For more details, check out Bellinzona weather in March.
In September, the weather in Bellinzona is generally milder, with average temperatures around 13°C (56°F) and highs reaching up to 23°C (75°F), while April is cooler, averaging 7°C (46°F) but still sees maximum temperatures close to 21°C (70°F). Both months experience similar levels of precipitation, with September receiving 126 mm (4.9 in) over about 13 days, and April slightly less at 121 mm (4.8 in) over 11 days. Humidity remains high in both months, with September at 83% and April slightly higher at 84%. For more specific insights about April weather, you can refer to Bellinzona weather in April.
September and May present contrasting weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 23°C (75°F), with an average of 13°C (56°F). The month experiences about 126 mm (4.9 in) of precipitation over 13 days, coupled with a relatively high humidity level of 83%. In comparison, May tends to be a bit cooler overall, with temperatures ranging from a minimum of -8°C (18°F) to a maximum of 25°C (78°F), averaging 11°C (52°F). However, May sees more precipitation, totaling 165 mm (6.5 in) over 19 days, while humidity remains slightly lower at 80%. For more details, you can check Bellinzona weather in May.
In comparing the weather between September and June, we see a marked difference in temperature and precipitation. September boasts a cooler climate with average temperatures ranging from a minimum of -1°C (30°F) to a maximum of 23°C (75°F), while June experiences warmer conditions with temperatures spanning from a minimum of 5°C (41°F) to a sweltering maximum of 34°C (94°F). Precipitation in September measures 126 mm (4.9 in) over 13 days, slightly less than June's 148 mm (5.8 in) over 18 days, indicating that June tends to be wetter despite its warmer temperatures. Humidity levels are quite similar in both months, with September at 83% and June at 82%. For more detailed insights on June weather, you can visit Bellinzona weather in June.
In comparing the weather of September and July, it is evident that July is generally warmer, with average temperatures reaching 17°C (64°F) and maximums soaring to 29°C (84°F). In contrast, September experiences cooler temperatures, with an average of 13°C (56°F) and maximums of only 23°C (75°F). Both months receive similar levels of precipitation, around 125-126 mm (4.9 in), but July has more rainy days (18) compared to September's 13 days of rain. Humidity remains constant at 83% for both months, adding a similar feel to the air in both summer and early autumn. For more specific details on July weather, you can check Bellinzona weather in July.
In comparing the weather between September and August, it’s clear that September experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 13°C (56°F), compared to August's milder minimum of 7°C (45°F) and an average of 17°C (63°F). The maximum temperatures in September reach only 23°C (75°F), whereas August sees warmer highs of 29°C (84°F). Additionally, September brings more precipitation, totaling 126 mm (4.9 in) over 13 days, although August also has similar rainfall levels at 160 mm (6.3 in) over the same number of days. Despite this, September’s humidity is slightly higher at 83%, compared to August's 80%. For more detailed insights, you can check Bellinzona weather in August.
The weather in September and October shows a notable shift, particularly in temperature and precipitation patterns. In September, temperatures range from a minimum of -1°C (30°F) to a pleasant maximum of 23°C (75°F), with an average of 13°C (56°F). Conversely, October experiences a slight dip in average temperature to 9°C (48°F), while the maximum hovers around 21°C (70°F), mirroring September's high slightly. Precipitation also increases significantly in October, totaling 185 mm (7.3 in) over 11 days, compared to September's 126 mm (4.9 in) over 13 days. Additionally, humidity rises from 83% in September to 90% in October, contributing to a heavier atmosphere. For a more detailed look at October's conditions, check out Bellinzona weather in October.
September and November present contrasting weather patterns as summer transitions into winter. In September, temperatures range from a mild minimum of -1°C (30°F) to a pleasant maximum of 23°C (75°F), with an average of 13°C (56°F). The month receives 126 mm (4.9 in) of precipitation over 13 days, accompanied by a relative humidity of 83%. In contrast, November significantly cools down, with temperatures dipping to a minimum of -10°C (14°F) and an average of just 4°C (39°F), peaking at 15°C (59°F). This month experiences slightly higher precipitation at 149 mm (5.9 in) over 12 days, alongside an increase in humidity to 88%. For more detailed insights, you can explore Bellinzona weather in November.
September and December present contrasting weather conditions. In September, temperatures typically range from a low of -1°C (30°F) to a pleasant high of 23°C (75°F), with an average of 13°C (56°F). Although it is generally milder, the month sees significant rainfall, totaling 126 mm (4.9 inches) across 13 days and averaging a humidity of 83%. In comparison, December is much cooler, with temperatures dropping to a minimum of -14°C (7°F) and peaking at just 10°C (50°F), averaging around 0°C (32°F). The precipitation decreases slightly to 111 mm (4.4 inches) over 11 days, but the humidity rises to 90%, creating a chilly atmosphere. For more details on December weather in Bellinzona, visit Bellinzona weather in December.
As September unfolds in Bellinzona, the weather presents a striking transition from the warmth of summer to the cooler embrace of autumn. Average temperatures hover comfortably around 13°C (56°F), with peaks reaching up to 23°C (75°F), offering a pleasant but gradual shift that distinguishes this month from the sweltering heat of July and August. However, as the leaves begin to change, you might also notice an increase in rainfall, with precipitation occurring on about 13 days and accumulating to 126 mm (4.9 in). The heightened humidity of 83% further adds to the characteristic change in atmosphere, making it a month defined by its refreshing coolness and occasional drizzle. For a comprehensive look at how September fits into the broader climatic patterns, be sure to explore Bellinzona Climate.