Last updated: August 27, 2025
September in Poschiavo, Switzerland, showcases a captivating transition from summer to autumn. With maximum temperatures reaching a pleasant 21°C (70°F) and an average of 10°C (50°F), the weather invites both locals and visitors to enjoy outdoor activities amidst stunning alpine scenery. Nighttime can be brisk, dipping to a chilly -7°C (19°F), reminding us of the rapidly changing seasons. The month sees approximately 115 mm (4.5 in) of rainfall spread over 15 days, contributing to the lush landscapes that define this picturesque region. With humidity levels averaging around 83%, the air carries a refreshing crispness, perfect for those seeking an invigorating Swiss experience.
September marks a transition in Poschiavo, Switzerland, as the warm summer days give way to the crispness of autumn. With temperatures ranging from a minimum of -7°C (19°F) to a maximum of 21°C (70°F), this month offers a delightful blend of mild warmth with cool evenings. The average temperature settles around 10°C (50°F), making it an ideal time for outdoor adventures among the stunning fall foliage. As nights grow cooler and days remain pleasantly warm, September invites visitors to embrace the beauty of nature while enjoying the comfortable climate that hints at the forthcoming winter chill. This month truly embodies the charm of seasonal change in the Alps.
In September, Poschiavo experiences a notable blend of warmth and moisture, with precipitation reaching 115 mm (4.5 in) over about 15 days. This marks a slight decrease from the more prolific downpours of August, which recorded 140 mm (5.5 in), yet remains robust compared to the earlier summer months. The transition into fall begins to soften the intense summer rains, as evidenced by the steady reduction in both rainfall and wet days from May's peak. As the weather shifts, September's precipitation plays a crucial role in replenishing the landscape in preparation for the approaching autumn chill, striking a harmonious balance that reflects the region's dynamic climate.
As September arrives in Poschiavo, Switzerland, the air fills with a mild 83% humidity, reflecting a slight rise from the summer months. This subtle increase creates a refreshing atmosphere, perfect for enjoying the stunning autumn landscapes. Compared to the lower levels seen in May and August, which hovered around 80%, September's humidity indicates a transition towards the wetter conditions typical of autumn. Following this month, a notable jump occurs in October, reaching 90%, as the region prepares for the chillier, more humid winter months ahead. Overall, September serves as a gentle reminder of the changing seasons, balancing comfort with the crispness that autumn brings.
In September, Poschiavo experiences a UV Index of 8, categorized as very high, with a burn time of just 15 minutes. This slight decrease from the peak summer months indicates that while the intense sun of July and August is fading, caution is still crucial for outdoor activities. The UV ratings throughout the year reveal a clear pattern: as winter approaches, the UV Index generally trends downwards from the extreme highs of summer. Residents and visitors should remain vigilant during this transitional month, ensuring proper sun protection to enjoy the stunning landscapes of Switzerland safely. For more information on UV levels year-round, visit Poschiavo UV Index.
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September in Poschiavo, Switzerland, offers a delightful continuation of the summer's warmth, boasting 315 hours of sunshine. As the year transitions from the peak summer months, which enjoy their zenith in July with 414 hours, sunlight begins to gradually wane but remains generous in the early autumn. August's 371 hours still linger in the air, creating a tapestry of golden hues and vibrant landscapes. This not only allows for breathtaking views but also provides ample opportunities for outdoor activities. Following September, the days shorten further, with October experiencing a drop to 282 hours, signaling the impending embrace of winter. The trend highlights the beautiful shift from the lively summer sun to the tranquil, crisp air of autumn, making September in Poschiavo an enchanting time to relish nature’s bounty.
In September, Poschiavo, Switzerland, experiences a 32% chance of sunny weather, marking a slight dip in variability as summer transitions to autumn. This trend reflects the end of the warmer months, where the chance of sunshine typically peaks in the spring, with March reaching a 58% likelihood. The sunlit days that characterize the earlier summer months gradually recede, as July and August boast figures around 39% and 47% respectively. As autumn sets in, the likelihood of bright days remains important for visitors and locals alike, making September a time where the allure of the fading summer sun mingles with the crispness of early fall.
As summer gives way to autumn in Poschiavo, Switzerland, September offers a transition marked by a 12-hour daylight duration. This reduction from the long, sun-drenched days of July and August—where the sun graced the landscape for 15 hours—indicates the gradual retreat of summer’s warmth. The month of September serves as a gentle prelude to the shorter days ahead, reminding us of nature’s rhythm as daylight dwindles toward 10 hours in October and further reduces to just 8 hours by December. This shifting balance of light not only illuminates the stunning Alpine surroundings but also enhances the sense of change as autumn colors emerge.
In September, the wind in Poschiavo, Switzerland gently whispers at an average speed of 1.0 m/s (2 mph), marking a subtle decline from the languid breezes of late summer. This lightness sets the tone for the transition into autumn, as the region experiences one of its calmest monthly averages. While the winter months promise a gradual increase in wind speed, with values reaching 1.7 m/s (4 mph) in December, September’s tranquility contrasts sharply with the brisk conditions to come. The overall trend reveals a gradual ebb in winds during late summer and early autumn, creating a serene backdrop as the vibrant hues of fall begin to paint the landscape.
Weather in Poschiavo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Poschiavo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, it’s clear that January is significantly colder. September sees average temperatures around 10°C (50°F) with highs reaching 21°C (70°F), while January experiences a frigid average of -9°C (17°F) and maximums barely above freezing at 4°C (40°F). Additionally, September is much wetter, receiving 115 mm (4.5 in) of precipitation over 15 days, compared to January's 47 mm (1.8 in) across just 8 days. The humidity remains relatively high in both months, peaking at 83% in September and even higher at 92% in January. For a more in-depth look at January's weather characteristics, you can visit Poschiavo weather in January.
The weather in September offers a notable contrast to that of February. With average temperatures hovering around 10°C (50°F) and a maximum of 21°C (70°F), September provides a more temperate climate, albeit with significant precipitation of 115 mm (4.5 in) across 15 days and relatively high humidity at 83%. In stark contrast, February experiences much colder conditions, with average temperatures dropping to -5°C (24°F) and a max of only 10°C (51°F). Additionally, February sees a lower total precipitation of 50 mm (2.0 in) over just 8 days, along with even higher humidity levels at 89%. For a detailed look at February conditions, you can view Poschiavo weather in February.
In comparing the weather of September and March, one can observe distinct differences in temperature and conditions. September experiences a more moderate climate, with average temperatures ranging from a chilly minimum of -7°C (19°F) to a pleasant maximum of 21°C (70°F), along with higher humidity at 83%. This month sees an average precipitation of 115 mm (4.5 in) over about 15 days. In contrast, March is significantly colder, with an average temperature of -1°C (30°F), dipping to a low of -23°C (-9°F) and reaching up to 12°C (54°F) during warmer days. The precipitation is lower at 82 mm (3.2 in) spread over 11 days, while the humidity slightly rises to 87%. For more details, you can explore Poschiavo weather in March.
Comparing the weather in September and April reveals notable differences in temperature and precipitation patterns. In September, temperatures range from a minimum of -7°C (19°F) to a comfortable maximum of 21°C (70°F), with an average of 10°C (50°F). This month experiences 115 mm (4.5 in) of precipitation over about 15 days and maintains a high humidity level of 83%. In contrast, April tends to be cooler, with temperatures ranging from a low of -12°C (12°F) to a maximum of 15°C (59°F) and an average of just 3°C (37°F). Precipitation slightly decreases to 103 mm (4.0 in) over 12 days, while humidity remains relatively high at 84%. For more detailed insights, check Poschiavo weather in April.
When comparing the weather of September and May, several notable differences emerge. September tends to be milder, with average temperatures ranging from a minimum of -7°C (19°F) to a maximum of 21°C (70°F). In contrast, May experiences cooler conditions, with temperatures ranging from a minimum of -12°C (11°F) to a maximum of 19°C (67°F). Although May has slightly more precipitation, totaling 147 mm (5.8 in) over 21 days, September's 115 mm (4.5 in) spread across 15 days indicates a wetter fall month. Humidity levels are relatively close, with September at 83% and May at 80%. For a closer look at what to expect during May, check out Poschiavo weather in May.
In comparing the weather between September and June, it is evident that June offers warmer temperatures, with average highs reaching 28°C (83°F) compared to September's maximum of 21°C (70°F). Additionally, while September experiences cooler minimum temperatures of -7°C (19°F), June has a more moderate minimum of 0°C (33°F). Both months see significant precipitation, with June recording 129 mm (5.1 in) over 17 days, compared to September's 115 mm (4.5 in) over 15 days. Humidity levels are similarly high in both months, with September at 83% and June slightly lower at 82%. For more detailed information, you can check Poschiavo weather in June.
In comparing the weather between September and July, September tends to be cooler with daily temperatures ranging from a minimum of -7°C (19°F) to a maximum of 21°C (70°F), averaging around 10°C (50°F). In contrast, July features milder conditions, characterized by temperatures that range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F) with an average of 14°C (57°F). While both months experience significant rainfall, July sees a slightly higher total of 122 mm (4.8 in) over 19 days compared to September's 115 mm (4.5 in) over 15 days. Interestingly, humidity levels remain consistent at 83% throughout both months. For a more detailed look at July weather, you can check out Poschiavo weather in July.
In comparing the weather between September and August, September tends to be cooler with a minimum temperature reaching -7°C (19°F) and an average of 10°C (50°F), compared to August's milder minimum of 4°C (40°F) and average of 14°C (57°F). The maximum temperatures also reflect this shift, peaking at 21°C (70°F) in September, whereas August experiences a warmer high of 26°C (79°F). While September sees slightly less precipitation at 115 mm (4.5 in) over 15 days, August is wetter with 140 mm (5.5 in) across 18 days. Humidity levels are slightly higher in September at 83% compared to 80% in August, contributing to a more damp feeling as summer transitions into fall. For more details on August weather, you can visit Poschiavo weather in August.
In comparing the weather between September and October, it becomes clear that October marks a significant drop in average temperatures, with September typically seeing a range from a minimum of -7°C (19°F) to a maximum of 21°C (70°F), while October's temperatures vary from -10°C (15°F) to 17°C (63°F). September experiences an average of 10°C (50°F) compared to October's 6°C (42°F). Additionally, October is wetter, with 144 mm (5.7 in) of precipitation over 9 days, compared to September's 115 mm (4.5 in) across 15 days. The humidity also slightly increases in October, reaching 90% compared to September's 83%. For more details, you can check Poschiavo weather in October.
September and November showcase distinct weather differences that mark the transition from autumn to winter. In September, temperatures range from a milder minimum of -7°C (19°F) to an average of 10°C (50°F), peaking at a comfortable 21°C (70°F). The precipitation level sits at 115 mm (4.5 in) over 15 days, accompanied by a humidity of 83%. In contrast, November brings a significant drop in temperatures, with a minimum of -23°C (-9°F), an average of -1°C (31°F), and a maximum of 13°C (55°F). The month also sees an increase in precipitation to 137 mm (5.4 in) over 13 days, alongside a slightly higher humidity of 88%. For more details, check out Poschiavo weather in November.
September and December present quite different weather patterns. In September, temperatures range from a chilly -7°C (19°F) at night to a pleasant high of 21°C (70°F) during the day, with an average temperature of around 10°C (50°F). The month is characterized by 115 mm (4.5 in) of precipitation over approximately 15 days, coupled with a humidity level of 83%. In contrast, December brings much colder conditions, with nighttime lows plummeting to -26°C (-15°F) and daytime highs reaching only 6°C (42°F), leading to an average temperature of -7°C (20°F). Precipitation remains similar at 110 mm (4.3 in), but it occurs over just 10 days, with humidity increasing to 90%. For more detailed information, you can check Poschiavo weather in December.
As summer gradually transitions to autumn, September in Poschiavo presents a unique blend of warmth and coolness. With temperatures ranging from brisk mornings to pleasantly mild afternoons, visitors can enjoy the beauty of changing foliage against a backdrop of cloudy skies and occasional rain. The month typically experiences higher humidity and a moderate number of rainy days, setting it apart from the drier, warmer months of July and August. This makes September an ideal time for those seeking a quieter slice of nature before the winter chill sets in. For more detailed insights, explore Poschiavo Climate.