Last updated: August 27, 2025
In September, the charming village of Andermatt, Switzerland experiences a captivating blend of temperatures, with a maximum reach of 20°C (69°F) and an average of 8°C (47°F), while the chill of nights may plunge to a minimum of -9°C (16°F). The month is characterized by significant precipitation, totaling 166 mm (6.5 in) across approximately 16 days, enveloping the landscape in lush greenery. With a notable humidity level of 83%, the air feels crisp and invigorating, making it perfect for exploring this stunning alpine region. Whether basking in the mild daytime sun or enjoying the fresh mountain air during cooler evenings, September in Andermatt promises an enchanting experience for all visitors.
In September, Andermatt, Switzerland begins to transition from the warmth of summer into the crisp embrace of autumn. The minimum temperatures drop to around -9°C (16°F), while the average settles at approximately 8°C (47°F). Despite this chill, the maximum temperature can still reach a pleasant 20°C (69°F), allowing for enjoyable outdoor activities in the stunning alpine scenery. This month marks a shift in the seasonal landscape, as vibrant foliage begins to replace the lush greenery of summer, providing a picturesque backdrop for visitors. As the days grow shorter and cooler, September in Andermatt invites travelers to embrace the beauty of nature's change.
In September, Andermatt experiences a notable precipitation total of 166 mm (6.5 in) over approximately 16 rainy days, marking a shift towards the wetter months that follow. This amount is a decrease from the previous month, August, which saw a substantial 261 mm (10.3 in) of rain, but is still significantly higher than the drier spring months. The transition into autumn reveals a consistent pattern where precipitation begins to increase, contributing to the lush landscapes that define the region. As summer's warmth wanes, September builds anticipation for October's average of 184 mm (7.3 in), suggesting that the area remains vibrant with moisture, setting the stage for the picturesque alpine scenery of fall.
In September, Andermatt experiences a notable humidity level of 83%, signaling a transition from the summer months. This level reflects a slight increase compared to August's 80%, reinforcing a trend of mild late-summer humidity. As the year progresses, the region tends to see a gradual uptick in moisture, with October and December peaking at 90%. Overall, while September offers a hint of autumn's arrival, it still clings to the lingering warmth of summer, making the air feel pleasantly crisp yet comfortably humid.
As the seasons shift in Andermatt, Switzerland, September brings a UV Index of 7, categorized as high, indicating that sun protection becomes increasingly important as summer wanes. Following the peak summer months, which recorded an impressive UV Index of 10, September offers a milder yet still significant level of UV exposure, with a burn time of just 25 minutes for unprotected skin. This trend shows a gradual decrease in UV intensity as the year progresses, transitioning from the very high indices of June and July to a moderate decrease in October. For those planning outdoor activities in September, it's crucial to enjoy the lingering warmth while taking appropriate precautions. To learn more about the UV Index trends throughout the year, visit Andermatt UV Index.
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As summer gracefully transitions into autumn, September in Andermatt, Switzerland, offers a delightful balance of sunshine, amassing 315 hours of golden rays. This month reflects a gentle decline from the peak of 414 hours in July, marking a gradual shift as nature prepares for the colder months ahead. Despite this reduction, September still shines brightly compared to the earlier months of the year, showcasing a robust increase from January’s mere 171 hours. The lingering warmth and stunning alpine views provide an inviting backdrop for outdoor adventures, making September a splendid time to explore the serene beauty of this picturesque Swiss village.
In Andermatt, Switzerland, September offers a 33% chance of sunny weather, reflecting a moderate likelihood of clear skies as summer transitions into autumn. This figure fits within the broader trend of increasing sunny days from the early months of the year, peaking in the spring. Notably, while the chances of sunshine in September are slightly higher than those in the peak summer months of July (26%) and August (31%), they position the month more favorably than the typically sunnier October (42%). Overall, as September rolls in, visitors can anticipate pleasant moments of sunshine interspersed with the beginnings of crisp autumn air, making it a wonderful time for outdoor exploration amidst breathtaking alpine scenery.
As summer transitions into autumn, September in Andermatt, Switzerland, brings a gentle decline in daylight duration, with approximately 12 hours of sunlight. Following the peak of 15 hours in June and July, the fading light mirrors the seasonal shifts, gradually preparing the landscape for the crispness of fall. While the daylight begins to recede, September still holds onto the warmth of late summer, allowing residents and visitors to enjoy the breathtaking scenery bathed in golden hues for longer. This month serves as a bridge, leading toward the shorter days of October, yet still vibrant enough to embrace the lingering charms of summer.
As September settles in Andermatt, Switzerland, the gentle whisper of the average wind speed—a calming 1.2 m/s (3 mph)—fills the alpine air, marking a smooth transition from the summer’s warmth. This month reflects a consistent trend observed throughout much of the summer, where the wind barely picks up its pace. The steady breathing of the wind in September offers an inviting backdrop for those seeking tranquility in the stunning mountainous landscape. While the first half of the year had seen slight variations with January peaking at 1.5 m/s, September serves as a reminder of nature's serene rhythm, paving the way for the invigorating breezes of autumn just around the corner.
Weather in Andermatt varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Andermatt, 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 -9°C (16°F) to a mild 20°C (69°F), with an average of 8°C (47°F). The month experiences considerable precipitation, totaling 166 mm (6.5 in) over about 16 days, accompanied by a humidity level of 83%. In contrast, January is significantly colder, with temperatures dropping from a minimum of -23°C (-9°F) to a maximum of 8°C (46°F), averaging at -7°C (19°F). Although January sees less rainfall, with 137 mm (5.4 in) over 13 days, humidity is higher at 92%. For more detailed insights, you can check Andermatt weather in January.
In comparing the weather of September and February, it's clear that February is significantly colder, with average temperatures hovering around -5°C (24°F), while September enjoys milder conditions with an average of 8°C (47°F). The minimum temperature in February can plummet to -22°C (-8°F), in stark contrast to September's lowest at -9°C (16°F). Additionally, September experiences more precipitation, totaling 166 mm (6.5 in) over 16 days, compared to February's 98 mm (3.9 in) across 12 days. Interestingly, February also has a slightly higher humidity level at 89%, compared to September's 83%. For a closer look at February’s conditions in Andermatt, feel free to check Andermatt weather in February.
When comparing the weather in September and March, there's a notable contrast in temperatures and conditions. September features a milder climate with temperatures ranging from a minimum of -9°C (16°F) to a maximum of 20°C (69°F) and an average of 8°C (47°F). In contrast, March is much colder, with temperatures ranging from -24°C (-11°F) at night to a maximum of 12°C (54°F) and an average temperature of -2°C (28°F).
Additionally, September experiences more precipitation, measuring 166 mm (6.5 inches) over 16 days, while March sees slightly less with 129 mm (5.1 inches) across 17 days. The humidity is also higher in March at 87%, compared to September's 83%. Those interested in the specifics of March weather can refer to Andermatt weather in March.
When comparing the weather in September and April, it's clear that September tends to be milder and wetter. September boasts an average temperature of 8°C (47°F), with highs reaching up to 20°C (69°F), while April sees a cooler average of 1°C (34°F) and a maximum of only 14°C (58°F). Additionally, September experiences more precipitation, totaling 166 mm (6.5 in) over 16 days, compared to April's 104 mm (4.1 in) spread over 12 days. Interestingly, both months have similar humidity levels, with September at 83% and April slightly higher at 84%. For more detailed insights into April conditions, you can check Andermatt weather in April.
In September, temperatures in Andermatt range from a minimum of -9°C (16°F) to a maximum of 20°C (69°F), with an average of 8°C (47°F). The month experiences significant precipitation, with 166 mm (6.5 in) falling over 16 days, resulting in a relatively high humidity level of 83%. In contrast, May sees slightly cooler temperatures, with a minimum of -9°C (15°F) and a maximum of 19°C (67°F), averaging around 5°C (41°F). Precipitation is somewhat lower at 156 mm (6.2 in), but it occurs over more days—20 in total—yielding a humidity level of 80%. For more details on the weather conditions, you can visit Andermatt weather in May.
In comparing the weather between September and June, notable differences emerge. September tends to be cooler, with average temperatures ranging from a low of -9°C (16°F) to a high of 20°C (69°F), while June offers milder conditions, with temperatures between -2°C (28°F) and a maximum of 27°C (80°F). Both months experience significant precipitation, but June sees slightly more rainfall at 201 mm (7.9 in) over 19 days, compared to September's 166 mm (6.5 in) over 16 days. Humidity levels remain relatively similar, with September at 83% and June slightly lower at 82%. For more detailed information, check out Andermatt weather in June.
In comparing the weather between September and July, September typically experiences milder temperatures with a minimum of -9°C (16°F) and an average of 8°C (47°F), peaking at 20°C (69°F). This month sees about 166 mm (6.5 in) of precipitation over roughly 16 days, maintaining a consistent humidity level of 83%. In contrast, July is warmer, with temperatures ranging from a minimum of 2°C (36°F) to an average of 12°C (54°F) and a maximum of 25°C (78°F). However, it also experiences more precipitation, recording 228 mm (9.0 in) over 22 days, while maintaining the same humidity level of 83%. For more detailed information, you can check Andermatt weather in July.
Comparing the weather in September and August reveals some notable differences. September experiences cooler temperatures, with a minimum of -9°C (16°F) and an average of 8°C (47°F), compared to August's milder minimum of 1°C (35°F) and average of 12°C (54°F). Precipitation is also reduced in September, totaling 166 mm (6.5 in) over 16 days, while August sees higher rainfall of 261 mm (10.3 in) across 22 days. Additionally, September has a slightly higher humidity level at 83%, compared to August's 80%. Overall, September marks a transition towards cooler weather and less precipitation compared to the relatively warmer and wetter August. For a deeper dive into the specifics, you can check Andermatt weather in August.
September and October exhibit notable differences in weather patterns. In September, the temperatures range from a minimum of -9°C (16°F) to a maximum of 20°C (69°F), with an average of 8°C (47°F). The month sees 166 mm (6.5 in) of precipitation over 16 days, coupled with a humidity level of 83%. In contrast, October experiences cooler temperatures, with a minimum of -10°C (15°F) and a maximum of 16°C (62°F), averaging around 4°C (40°F). This month is slightly wetter, with 184 mm (7.3 in) of precipitation over just 13 days and a higher humidity of 90%. For a detailed forecast, check Andermatt weather in October.
In September, temperatures in Andermatt are generally milder, with a minimum of -9°C (16°F) and an average of 8°C (47°F), peaking at 20°C (69°F). The month is characterized by higher precipitation, totaling 166 mm (6.5 in) over 16 days, along with a humidity level of 83%. In contrast, November experiences much colder weather, with temperatures ranging from a minimum of -18°C (-1°F) to a maximum of 13°C (56°F) and an average of -2°C (29°F). Although total precipitation decreases to 115 mm (4.5 in) over 14 days, humidity rises slightly to 88%. For a detailed look at November conditions, check Andermatt weather in November.
In September, temperatures in Andermatt range from a minimum of -9°C (16°F) to a maximum of 20°C (69°F), with an average temperature of 8°C (47°F). The month sees considerable rainfall, with 166 mm (6.5 in) of precipitation spread over 16 days and an average humidity of 83%. In contrast, December brings a much colder climate, with temperatures dropping to a minimum of -20°C (-5°F) and a maximum of 6°C (44°F), resulting in an average temperature of -6°C (22°F). Precipitation increases slightly to 181 mm (7.1 in) over 19 days, accompanied by higher humidity levels at 90%. For more details on weather conditions, you can visit Andermatt weather in December.
As September unfolds in Andermatt, the weather presents a unique transition from the vibrant summer months to the crisp embrace of autumn. With average temperatures settling around a cool 8°C (47°F), this month stands out for its notable drops compared to the warmer summer, while struggling to reach even a maximum of 20°C (69°F). The increased humidity at 83% and a considerable 166 mm (6.5 in) of rainfall over 16 days illustrate September's reputation for being a rather wet month, perfect for those who appreciate the beauty of nature's shift. For a deeper understanding of what to expect throughout the year, explore our guide on Andermatt Climate.