Last updated: August 27, 2025
Experience the enchanting September weather in Silvaplana, Switzerland, where temperatures range from a chilly minimum of -12°C (11°F) to a pleasant maximum of 18°C (65°F). The average daily temperature hovers around a crisp 6°C (44°F), creating an invigorating atmosphere perfect for outdoor adventures. Expect about 126 mm (5.0 in) of precipitation spread across 15 rainy days, contributing to the lush landscapes that characterize this stunning alpine region. With a relative humidity of 83%, the air carries the fresh scent of autumn, making each moment in Silvaplana a refreshing escape into nature's beauty.
In Silvaplana, Switzerland, September marks a gradual shift in temperatures as the summer warmth begins to wane. With minimums around -12°C (11°F) and average temperatures settling at 6°C (44°F), the crispness of autumn starts to envelop the landscape. The daytime highs still reach a pleasant 18°C (65°F), allowing for lingering outdoor activities amidst the stunning alpine scenery before the chill of winter sets in. As the month progresses, you'll notice a consistent trend of cooling, hinting at the transition toward the colder months ahead, while still offering a refreshing escape from the summer heat. This unique blend of temperatures makes September a beautifully transitional period, ideal for experiencing the vibrant autumn foliage and serene tranquility of the region.
September in Silvaplana, Switzerland, brings a noticeable shift in precipitation patterns as summer transitions into autumn. With 126 mm (5.0 in) of rainfall over 15 days, the month showcases a blend of lingering summer showers and the early whispers of fall. This amount of precipitation marks a slight decrease from the wettest summer months of July and August, which each saw 159 mm (6.3 in) and 195 mm (7.7 in), respectively. However, September's rain remains significant, indicating that the region continues to experience substantial moisture as it prepares for the colder months ahead. This trend reflects a consistent pattern of wetter weather during the latter part of the year, suggesting that those visiting Silvaplana in September should be ready for a mix of sun and rain while enjoying the stunning alpine scenery.
In September, Silvaplana experiences a humidity level of 83%, marking a slight increase from the drier months of summer. This transition towards the end of the year reflects a gradual return to the higher humidity levels typical of the colder months. Compared to the 80% average in August and the preceding months, September's humidity hints at the approaching autumn, when moisture levels again climb closer to winter peaks. This rhythm of humidity highlights Silvaplana’s distinctive climate, where the warm summer air meets the crisp, cool breezes of fall, setting the stage for the snowy months ahead.
As September arrives in Silvaplana, Switzerland, the UV Index reflects a gradual decrease from the peak summer levels, settling at 7, which indicates a high exposure category. This month marks a transition toward cooler weather, with a burn time of 25 minutes—a notable shift from the short 15 minutes experienced in the summer months. While September still requires caution under the sun, it is a reminder that the intense UV rays of July and August are receding. This trend signals the start of autumn, making it essential for outdoor enthusiasts to remain vigilant against sun exposure even as the days grow shorter. For more detailed insights, check out the Silvaplana UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Silvaplana showcases a delightful blend of lingering warmth and stunning alpine vistas. With 309 hours of sunshine, this month maintains a vibrant glow that rivals the peak summer months of July and June, accented by an impressive total of 410 and 386 hours, respectively. While the sunlight begins to wane compared to August's 366 hours, September offers a picturesque backdrop for outdoor adventures amidst the changing foliage. Overall, the trend of increasing daylight hours from January to September is clear, creating an inviting atmosphere for both visitors and locals to revel in the breathtaking beauty of the Swiss Alps.
In Silvaplana, Switzerland, the likelihood of sunny weather reaches its peak in the early months of the year, with February enjoying a promising 37% chance of sunshine. As spring progresses, the chances fluctuate, with March seeing a slight rise to 40%, before dipping again in April and further into the summer months. September marks a subtle decline, offering a 26% probability of clear skies, which is consistent with the trend of decreasing sunlight as autumn approaches. Interestingly, while the summer months maintain a relatively stable chance of sun, September stands out as a transitional period, hinting at the impending change in weather. Overall, while sunny days are still possible, the shift toward cooler months marks a departure from the sunnier days enjoyed earlier in the year.
As summer gently fades into autumn in Silvaplana, Switzerland, September welcomes a shift in daylight, offering about 12 hours of sunlight each day. This marks a noticeable decline from the lengthy days of summer, where June, July, and August bask in a generous 15 hours of daylight. As nature transitions into fall, daylight diminishes steadily, hinting at shorter days ahead in October, with only 10 hours. This gradual decrease is a part of the annual rhythm, reflecting the delicate balance between the vibrant energy of summer and the serene tranquility of autumn, inviting residents and visitors alike to savor the golden hues of early fall.
As summer gently transitions into autumn, September in Silvaplana, Switzerland embraces a serene calm, reflected in its average wind speed of 1.2 m/s (3 mph). This slight dip from the 1.5 m/s of August signals the end of the bustling summer days, as nature prepares for the cooler months ahead. Throughout the year, wind speeds have shown a generally stable pattern, remaining between 1.2 and 1.7 m/s, with the calmest conditions typically appearing in late summer and early autumn. Interestingly, the wind picks up again in October, showcasing the region's dynamic climate as it transitions towards winter. This gentle variability not only enhances the picturesque landscape of Silvaplana but also offers a tranquil atmosphere, perfect for reflection and appreciation of the changing seasons.
Weather in Silvaplana varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Silvaplana, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Silvaplana range from a minimum of -12°C (11°F) to a maximum of 18°C (65°F), with an average temperature of 6°C (44°F). The month experiences significant precipitation, totaling 126 mm (5.0 in) over about 15 days, accompanied by a humidity level of 83%. In contrast, January sees much colder weather, with temperatures dipping as low as -27°C (-17°F) and averaging -11°C (12°F), only reaching a maximum of 2°C (36°F). Precipitation decreases to 75 mm (2.9 in) over 10 days, with humidity slightly higher at 92%. The stark difference in temperatures and precipitation patterns underscores the transition from the milder autumn conditions of September to the harsh winter climate of January. For more details on January weather, visit Silvaplana weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a chilly minimum of -12°C (11°F) to a pleasant maximum of 18°C (65°F), with an average of 6°C (44°F). The month sees considerable precipitation, totaling 126 mm (5.0 in) over 15 days, and humidity levels at 83%. In contrast, February is considerably colder, with temperatures reaching a minimum of -28°C (-18°F) and a maximum of just 6°C (43°F), which results in an average temperature of -8°C (18°F). The precipitation in February is less, at 59 mm (2.3 in) over 11 days, accompanied by higher humidity at 89%. For those interested in more specifics, Silvaplana weather in February provides in-depth information.
In comparing the weather patterns of September and March, it's clear that March is significantly colder. September experiences a range of temperatures from a minimum of -12°C (11°F) to a maximum of 18°C (65°F), with an average of 6°C (44°F). In contrast, March sees much lower temperatures, with a minimum of -26°C (-14°F), an average of -5°C (23°F), and a maximum of only 11°C (52°F). Additionally, September receives more precipitation at 126 mm (5.0 in) over 15 days, while March has 90 mm (3.5 in) over 13 days. Humidity levels are relatively similar, with September at 83% and March slightly higher at 87%. For more details on the weather during this month, you can refer to Silvaplana weather in March.
In comparing the weather between September and April, we see notable differences in temperature and precipitation. September experiences milder conditions, with average temperatures ranging from a minimum of -12°C (11°F) to a maximum of 18°C (65°F), while April is colder, with temperatures fluctuating from a minimum of -19°C (-1°F) to a maximum of 12°C (54°F). Precipitation is also slightly higher in September at 126 mm (5.0 in) over 15 days compared to April's 99 mm (3.9 in) across 12 days. Humidity levels are quite similar, with September at 83% and April slightly higher at 84%. For more detailed insights on April weather, you can refer to Silvaplana weather in April.
In comparing the weather of September and May, we find that both months experience similar maximum temperatures, peaking at 18°C (65°F), but September offers a slightly warmer average temperature of 6°C (44°F) compared to May’s 3°C (38°F). Interestingly, September sees a slightly lower minimum temperature of -12°C (11°F) versus May's -13°C (8°F). Precipitation levels are fairly high in both months, with May recording 150 mm (5.9 in) across 22 days, while September has 126 mm (5.0 in) over 15 days. Humidity is relatively consistent, with September at 83% and May at 80%. For a closer look at May weather, you can visit Silvaplana weather in May.
In comparing the weather of September and June, one can see distinct differences in temperature and precipitation. September tends to be cooler, with temperatures ranging from a minimum of -12°C (11°F) to a maximum of 18°C (65°F), averaging around 6°C (44°F). In contrast, June is warmer, with temperatures ranging from -2°C (28°F) to a maximum of 25°C (77°F), averaging 9°C (49°F). While September experiences 126 mm (5.0 inches) of precipitation over 15 days, June sees slightly more rainfall at 159 mm (6.3 inches) over 19 days. Humidity levels are quite similar as well, with September at 83% and June at 82%. For a detailed overview of June weather, you can check Silvaplana weather in June.
Comparing the weather in September and July reveals distinct seasonal characteristics. In September, temperatures range from a minimum of -12°C (11°F) to a maximum of 18°C (65°F), with an average of 6°C (44°F), while July offers milder temperatures, with a minimum of 0°C (33°F) and a maximum of 23°C (73°F), averaging 10°C (51°F). Although September receives slightly less precipitation at 126 mm (5.0 in) over 15 days, compared to July's 159 mm (6.3 in) over 21 days, both months maintain high humidity levels of 83%. For a more detailed look at July's conditions, visit Silvaplana weather in July.
In comparing the weather between August and September, it's clear that September brings a notable drop in temperatures, with minimums falling to -12°C (11°F) compared to August’s minimum of 0°C (33°F). The average temperature in September is a cool 6°C (44°F), whereas August remains milder at an average of 10°C (51°F). Additionally, September witnesses less precipitation overall, accumulating 126 mm (5.0 in) over 15 days, compared to August's 195 mm (7.7 in) over 21 days. Despite September's higher humidity levels at 83%, August’s humidity is still significant at 80%. For a more detailed overview of August's weather, you can visit Silvaplana weather in August.
In September, the weather is somewhat milder with a minimum temperature of -12°C (11°F) and an average of 6°C (44°F), peaking at a maximum of 18°C (65°F). Precipitation is moderate, totaling 126 mm (5.0 in) over 15 days, with humidity levels around 83%. In contrast, October brings cooler temperatures, with a minimum of -10°C (14°F), an average of 2°C (36°F), and a maximum of 14°C (57°F). The month sees slightly higher precipitation at 148 mm (5.8 in), albeit over just 11 days, and humidity rises to 90%. For more detailed information, you can check Silvaplana weather in October.
In comparing the weather between September and November, we see a notable shift in temperatures and conditions. September typically enjoys milder temperatures, with a minimum of -12°C (11°F) and an average of 6°C (44°F), while November experiences much colder conditions, featuring a minimum of -22°C (-8°F) and an average temperature plummeting to -4°C (25°F). Both months exhibit similar precipitation levels, with September recording 126 mm (5.0 in) over 15 days and November slightly higher at 132 mm (5.2 in) across 14 days. Humidity also increases from 83% in September to 88% in November, contributing to a notably chillier atmosphere as winter approaches. For a closer look at what to expect, check out Silvaplana weather in November.
In September, the weather in Silvaplana features a mild average temperature of around 6°C (44°F), with daytime highs reaching up to 18°C (65°F) and nighttime lows dropping to -12°C (11°F). The month experiences a significant amount of precipitation, totaling 126 mm (5.0 in) across 15 days, while the humidity averages 83%. In contrast, December brings much colder conditions, with an average temperature of -9°C (16°F), morning lows plummeting to -26°C (-14°F), and afternoon highs only reaching 2°C (37°F). Despite a similar precipitation level of 125 mm (4.9 in) over 15 days, December's humidity rises to 90%, making the air feel even chillier. For a detailed look at weather conditions in December, visit Silvaplana weather in December.
As September graces Silvaplana, it brings a noticeable shift in weather compared to the balmy summer months that preceded it. The temperatures start to cool, with refreshing days giving way to brisk nights, making it an ideal time for those who enjoy outdoor activities in milder conditions. While the landscape remains stunning, the increase in precipitation, with about two weeks of rain, adds a fresh vibrancy to the already picturesque surroundings. The air becomes crisper, accompanied by a rise in humidity that settles over the region. This transition harmonizes perfectly with the onset of autumn, inviting both locals and visitors to experience the captivating changes. For a more detailed overview of the area's climate, explore Silvaplana Climate.