Last updated: August 27, 2025
September in Samnaun, Switzerland presents a unique blend of autumnal charm and shifting weather patterns. With maximum temperatures reaching 20°C (69°F) and an average of 7°C (46°F), visitors experience a mild climate that contrasts sharply with the cooler minimum of -11°C (13°F) at night. This month witnesses 136 mm (5.3 in) of precipitation over 16 days, contributing to the vibrant fall foliage that envelops the region. The air is laden with an average humidity of 83%, enhancing the crispness that characterizes the season. Whether you’re exploring the picturesque landscapes or gearing up for early winter sports, September offers a captivating atmosphere in this alpine haven.
As September unfolds in Samnaun, Switzerland, the temperatures begin to exhibit a gentle transition from the warmth of summer to the chill of autumn. With nighttime lows averaging around -11°C (13°F), and daytime highs reaching up to 20°C (69°F), the month offers a refreshing yet crisp climate ideal for outdoor adventures. The average temperature settles at a comfortable 7°C (46°F), making it a pleasant time for hiking and exploring the stunning Alpine scenery. Compared to the previous months, September brings a slight drop in warmth, signaling nature’s shift as the leaves start to change. Whether you're basking in the mild days or savoring the cool evenings, Samnaun's September temperatures provide a perfect backdrop for enjoying the beauty of this picturesque region.
In September, Samnaun, Switzerland experiences a notable transition in precipitation patterns, with a recorded 136 mm (5.3 in) of rain across 16 days. This marks a brief dip following the peak of summer rainfall in August, which saw 184 mm (7.2 in) over 22 days. As summer gives way to autumn, September’s precipitation reflects a diverse mix of rainy days, contributing to the region’s lush landscapes. The steady rainfall, though slightly less than May’s substantial total of 176 mm (6.9 in), plays a crucial role in preparing the area for the upcoming winter months. With 16 days of rain, September maintains a lively rhythm, continuing the lushness that characterizes this alpine paradise.
September in Samnaun, Switzerland, ushers in a subtle transition in humidity, with levels averaging around 83%. This marks a slight increase from the summer months, as August's humidity sits at 80%. As the region bids farewell to warmer days, the air becomes a touch more moist, signaling the approach of autumn. The trend of gradual humidity enhancement from May's 78% through to October's striking 90% illustrates the area's characteristic shift toward a more saturated atmosphere. Early autumn in Samnaun, therefore, offers a refreshing blend of crisp breezes mingled with just enough humidity to keep the environment vibrant and lush.
As summer transitions to fall in Samnaun, Switzerland, the UV Index begins to show a gradual decline. In September, the UV Index measures a noteworthy 7, still categorized as high, which indicates a burn time of approximately 25 minutes for unprotected skin. This marks a shift from the very high values seen in the peak summer months, reflecting the waning intensity of the sun as winter approaches. Despite the decrease, it's essential to remain vigilant about sun exposure, particularly during outdoor activities in the beautiful alpine surroundings. For more detailed information on UV indices throughout the year, visit Samnaun UV Index.
UV Risk Categories
September in Samnaun, Switzerland, offers a delightful transition from the vibrant summer sun to the cooler autumn days, showcasing 309 hours of sunshine. This marks a significant dip from the peak of 409 hours in July, yet remains comfortably above the lower counts seen in winter months. The sunshine trend over the year reflects a gentle decline after the high of summer, with September still basking in a generous amount of sunlight. As the days grow shorter, the lingering warmth invites visitors to explore the stunning landscapes, making it a perfect time for hiking and enjoying the breathtaking Swiss vistas before the winter chill arrives.
In September, Samnaun, Switzerland, enjoys a 37% chance of sunny weather, marking it as one of the more promising months for sunshine as summer transitions into fall. This likelihood sits comfortably in the middle range compared to other months, particularly after a dip in the sunny days of summer, which recorded a lower chance in both July and August at 31% and 29% respectively. With September's weather often characterized by lingering warmth, visitors can expect a blend of pleasant sunny spells amidst the early onset of autumnal hues, making it a delightful time to explore this picturesque destination. The trend indicates a slight recovery in sunlight as the year progresses toward its end, with October just slightly higher at 40%.
As September unfolds in Samnaun, Switzerland, the daylight duration begins to shift subtly but noticeably, with the sun gracing the sky for approximately 12 hours. This marks a gentle decline from the height of summer, where the days stretched to a generous 15 hours in June and July. The gradual transition from the long, sun-drenched days of summer to the shorter, cooler autumn is evident as daylight diminishes in October to just 10 hours. September serves as a poignant reminder of the changing seasons, balancing between the lingering warmth of summer and the crisp anticipation of autumn, inviting residents and visitors alike to savor the last golden rays before winter settles in.
As September arrives in Samnaun, Switzerland, the gentle caress of the wind becomes a subtle backdrop to the changing scenery. With an average wind speed of 1.2 m/s (3 mph), September marks a slight dip from the summer months, continuing a trend of calm breezes that persists throughout the year. This seasonal decline in wind intensity is evident as temperatures begin to cool, creating an inviting atmosphere for outdoor enthusiasts. The consistent wind patterns from January to August, hovering around 1.3 to 1.5 m/s, provide a serene yet invigorating environment, while the transition into autumn brings a whisper of chill, promising an enchanting blend of nature's beauty and tranquil escapes.
Weather in Samnaun varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Samnaun, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a chilly -11°C (13°F) at night to a mild 20°C (69°F) during the day, culminating in an average of 7°C (46°F). This month is characterized by significant rainfall, with 136 mm (5.3 in) spread across 16 days, accompanied by a humidity level of 83%. Conversely, January experiences much harsher temperatures, with extreme lows of -28°C (-18°F) and a daily average of -8°C (17°F). Precipitation slightly decreases to 129 mm (5.1 in), falling over just 11 days, but the humidity rises to 93%. For a closer look at January weather specifics, you can check Samnaun weather in January.
In September, temperatures generally range from a chilly -11°C (13°F) at their lowest to a comfortable 20°C (69°F) at their peak, with an average of 7°C (46°F). The month experiences considerable precipitation, totaling 136 mm (5.3 in) over 16 days, while humidity levels hover around 83%. In contrast, February presents a much colder climate, where minimum temperatures can drop to -23°C (-9°F) and average around -5°C (23°F), reaching a maximum of 8°C (47°F). Precipitation is less frequent, accumulating to 84 mm (3.3 in) over 12 days, and the humidity is slightly higher at 89%. For more details on February weather specifics, visit Samnaun weather in February.
September and March present contrasting weather conditions. In September, temperatures range from a minimum of -11°C (13°F) to a maximum of 20°C (69°F), with an average of 7°C (46°F) and a precipitation of 136 mm (5.3 in) spread over 16 days. The humidity during this month is relatively high at 83%. In contrast, March is significantly colder, experiencing minimum temperatures of -24°C (-11°F) and maximums of 11°C (53°F), with an average temp of -3°C (27°F). While overall precipitation in March is slightly lower at 114 mm (4.5 in) across 17 days, the humidity is even higher at 86%. For more detailed insights on March weather, visit Samnaun weather in March.
When comparing the weather in September and April, it’s clear there are notable differences in temperature and precipitation. September enjoys a milder climate with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 20°C (69°F) and an average of 7°C (46°F). In contrast, April experiences colder temperatures, with a minimum of -21°C (-5°F) and a maximum of 15°C (59°F), giving it an average of just 1°C (34°F). Precipitation levels also vary, with September receiving 136 mm (5.3 in) over 16 days, while April sees 86 mm (3.4 in) across 12 days. Despite these differences, both months maintain a high humidity level of 83%. For more specific details on April weather, you can visit Samnaun weather in April.
In September, the weather tends to be milder with average temperatures around 7°C (46°F), reaching a maximum of 20°C (69°F), while May experiences slightly cooler averages with a mean temperature of 5°C (41°F) and highs of 21°C (70°F). September sees more precipitation, with 136 mm (5.3 in) over 16 days, compared to May's 176 mm (6.9 in) spread across 23 days, suggesting that you can expect more rainy days during the later month. Additionally, humidity levels in September are higher at 83%, while in May, it is slightly lower at 78%. For a detailed look at the weather in May, check out Samnaun weather in May.
In comparing the weather patterns of September and June, several notable differences emerge. September typically experiences a wider range of temperatures, with a minimum of -11°C (13°F) and a maximum of 20°C (69°F), while June sees milder lows of -3°C (27°F) and warmer highs reaching 26°C (79°F). Precipitation is quite common in both months, with September recording about 136 mm (5.3 in) over 16 days, compared to June's higher 150 mm (5.9 in) spread over 20 days. Humidity levels are relatively similar, hovering around 83% in September and slightly lower at 79% in June. For further insights into the weather in June, check out Samnaun weather in June.
September weather in Samnaun is notably cooler than in July, with average temperatures ranging from a minimum of -11°C (13°F) to a maximum of 20°C (69°F). In contrast, July typically sees milder conditions, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 26°C (80°F). Both months experience significant precipitation, with September receiving 136 mm (5.3 in) over 16 days and July slightly higher at 175 mm (6.9 in) over 21 days. Humidity remains quite similar, at 83% in September and 82% in July. For a closer look at July conditions, check out Samnaun weather in July.
In comparing the weather between September and August, September experiences cooler temperatures with a minimum of -11°C (13°F) and an average of 7°C (46°F), while August has a more moderate range with a minimum of 0°C (32°F) and an average of 11°C (53°F). Additionally, September sees a maximum temperature of 20°C (69°F), which is slightly lower than August's maximum of 23°C (74°F). Precipitation is also notable, with September receiving 136 mm (5.3 in) over 16 days, compared to August's 184 mm (7.2 in) over 22 days, indicating that summer typically has more rainy days. Humidity levels remain somewhat consistent, with September at 83% and August at 80%. For a closer look at August weather patterns, you can check Samnaun weather in August.
September and October experience similar temperature ranges, with both months seeing a minimum of -11°C (13°F). However, September boasts a slightly higher average temperature of 7°C (46°F) and a maximum of 20°C (69°F), while October's averages drop to 3°C (38°F) with a maximum of 16°C (62°F). Precipitation levels remain fairly consistent, with September receiving 136 mm (5.3 in) over 16 days, compared to October's 127 mm (5.0 in) over 13 days. Additionally, October sees a slight increase in humidity at 90%, up from September's 83%. For more detailed information, check Samnaun weather in October.
September typically experiences milder temperatures compared to November, with minimums around -11°C (13°F) and maximums reaching up to 20°C (69°F). This month sees an average temperature of 7°C (46°F) and experiences significant precipitation, totaling 136 mm (5.3 in) over 16 days, paired with a humidity level of 83%. In contrast, November is much colder, with temperatures ranging from a minimum of -21°C (-5°F) to a maximum of 12°C (55°F); the average temperature drops to -3°C (27°F). Precipitation decreases to 91 mm (3.6 in) across 10 days, and humidity slightly increases to 89%. For a more detailed look at November weather, visit Samnaun weather in November.
In comparing the weather of September and December, a marked shift in temperature and conditions is evident. September experiences a milder climate, with temperatures ranging from a chilly minimum of -11°C (13°F) to a pleasant maximum of 20°C (69°F) and an average of 7°C (46°F). This month also features significant precipitation, totaling 136 mm (5.3 in) over 16 days, with humidity at 83%.
In contrast, December brings much colder temperatures, with a minimum plunging to -27°C (-16°F) and a maximum of just 3°C (38°F), leading to an average of -7°C (19°F). Precipitation increases slightly to 155 mm (6.1 in) over 17 days, and humidity rises to 90%. For those looking to understand the winter climate more thoroughly, check out Samnaun weather in December.
As September unfolds in Samnaun, the weather begins to shift noticeably from the summer warmth. Temperatures range from a mild 20°C during the day to a brisk -11°C at night, heralding the transition into autumn. This month sees an increase in precipitation, with an average of 16 days experiencing rain, making the landscape lush but also emphasizing the need for adaptability. Coupled with high humidity levels, the air feels quite different from the clear summer days. For a deeper dive into how Samnaun's climate evolves throughout the year, be sure to check out Samnaun Climate.