Last updated: August 27, 2025
In Saillon, Switzerland, September presents a mild yet varied climate that captivates residents and visitors alike. The temperature range showcases a comfortable maximum of 23°C (73°F), while the average hovers around 10°C (50°F), dipping to a crisp -6°C (22°F) during the colder nights. Rainfall is notable, with 113 mm (4.5 in) accumulated over 15 days, contributing to the region's lush landscapes. Accompanied by a humidity level of 81%, the weather reflects a charming early autumn atmosphere, perfect for exploring the scenic beauty of this enchanting Swiss locale.
As September unfolds in Saillon, Switzerland, temperatures begin to signal the transition from summer to autumn. With a minimum of -6°C (22°F) and a comfortable average of 10°C (50°F), the month offers a refreshing escape from the heat of summer while still allowing for pleasant days. The maximum reaches a balmy 23°C (73°F), inviting locals and visitors alike to enjoy outdoor activities amidst the stunning fall foliage. This month serves as a bridge, showcasing a gradual decline in temperatures that hint at the chillier months ahead, while still providing ample opportunities to savor the beauty of the Swiss countryside.
In September, Saillon experiences a notable shift in precipitation, with 113 mm (4.5 in) of rain falling over 15 days. This marks a decrease from the heavy showers of May and June, yet still offers a refreshing continuation of the wetter months leading into autumn. The rainfall in September typically acts as a gentle transition, nurturing the landscape as it prepares for the cooler seasons ahead. While the amount is lower than the peak summer months, which saw over 180 mm, it is ideal for maintaining the lush greenery for which this beautiful Swiss village is known. As the month progresses, the crisp air combined with the lingering moisture creates a picturesque setting, highlighting Saillon's charm as it moves from summer's vibrancy into the serene beauty of fall.
In September, Saillon welcomes a slight uptick in humidity, reaching 81%, a modest increase from the summer's low of 77% in August. This transition signals the gradual shift from the warmer, drier months toward the cooler, wetter autumn season. Throughout the year, Saillon experiences its highest humidity levels in the winter months, peaking at 91% in January and December. As the seasons change, the humidity typically fluctuates: a steady decline from January to August gives way to the incremental rise in September, reflecting the encroaching autumnal atmosphere. This rhythm not only enhances the region’s lush landscapes but also sets the stage for the enchanting beauty of the fall season.
As summer fades into autumn in Saillon, Switzerland, September brings a UV Index of 7, categorized as high, with a burn time of 25 minutes. After experiencing the peak levels of UV radiation in June and July, where the index reached its maximum of 10, there's a notable decrease as August transitions to September. However, despite this drop, sun protection remains essential, especially for those enjoying the lingering warm days. The moderate temperatures paired with elevated UV levels make it important to stay vigilant against sun exposure. To learn more about the UV Index throughout the year, visit Saillon UV Index.
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As summer transitions into autumn, September shines brightly in Saillon, Switzerland, offering a delightful 325 hours of sunshine. This month marks a gentle decline from the peak of July, which boasts the most sun at 416 hours, yet still retains a generous glow that invites residents and visitors alike to relish the outdoors. Notably, September's sunshine outshines the earlier months of the year, with a considerable leap from January's mere 172 hours. As the vibrant colors of fall begin to paint the landscape, the warm rays of September provide the perfect backdrop for those looking to soak in the last remnants of summer's embrace before the chill of October's 288 hours sets in.
In September, Saillon, Switzerland, experiences a 33% chance of sunny weather, reflecting a slight dip from the peak summer months. This trend mirrors the gradual transition from summer to autumn, as opportunities for sunshine become less frequent. Comparing September to its preceding months, which hover around 30-36%, it's clear that the sun still manages to shine on the charming vineyards and stunning landscapes of the region. Additionally, the likelihood of sunny days in September remains competitive with the following month, October, which boasts a more favorable 45% chance. Thus, while not guaranteed, September still offers enticing prospects for those seeking to bask in the late summer sun before autumn fully takes hold.
As summer wanes into autumn, September in Saillon, Switzerland, offers a gentle transition in daylight hours, boasting about 12 hours of sunlight each day. This marks a noticeable decrease from the 15 hours experienced in the peak of summer, yet it remains a generous amount compared to the shorter days of winter. Following September, the days continue to shorten, with daylight dwindling to 10 hours by October. This trend illustrates a gradual retreat of sunshine, creating a beautifully mellow atmosphere where the vibrant hues of early autumn can truly shine. The balance between light and darkness sets the stage for cozy evenings and the stunning fall landscape that Saillon is celebrated for.
As September unfolds in Saillon, Switzerland, the gentle caress of the wind slows to an average speed of 1.0 m/s (2 mph), marking a notable dip from the summer months. This trend of diminishing winds continues a steady decline observed since spring, suggesting a tranquil transition into the fall season. With July and August maintaining a consistent 1.1 m/s (3 mph), the shift in September highlights the region's embrace of quieter atmospheric moments. As the air becomes stiller, it sets the stage for the beautiful autumn foliage and cozy evenings ahead, inviting both locals and visitors to savor the serene charm of this picturesque Swiss village.
Weather in Saillon varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saillon, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a chilly -6°C (22°F) to a pleasant max of 23°C (73°F), with an average of 10°C (50°F). The month experiences moderate precipitation of 113 mm (4.5 in) spread over 15 days, and humidity averages around 81%. In contrast, January is much colder, with temperatures plummeting to a minimum of -26°C (-15°F) and peaking at only 8°C (46°F), resulting in an average of -8°C (18°F). January also sees higher precipitation levels at 140 mm (5.5 in) but over fewer days, with 10 wet days and higher humidity at 91%. For more insights into January weather, visit Saillon weather in January.
When comparing the weather in September and February, we can see significant differences in temperature and conditions. September generally offers a milder climate, with average temperatures around 10°C (50°F) and maximums reaching up to 23°C (73°F). This month experiences a good amount of precipitation, with 113 mm (4.5 in) spread across about 15 days, contributing to a relative humidity of 81%.
In contrast, February presents a much colder scenario, with average temperatures dropping to -4°C (26°F) and maximums peaking at 12°C (55°F). Although precipitation is similar, at 108 mm (4.3 in), it falls over fewer days—approximately 11—and the humidity is slightly higher at 89%. For more specific insights into February weather in Saillon, you can visit Saillon weather in February.
In comparing the weather between September and March, we see distinct seasonal differences. September tends to be milder, with temperatures ranging from a minimum of -6°C (22°F) to a maximum of 23°C (73°F) and an average of 10°C (50°F). It experiences about 113 mm (4.5 in) of precipitation over approximately 15 days, accompanied by a relative humidity of 81%. In contrast, March presents a much colder climate, with temperatures plummeting to a minimum of -24°C (-11°F) and averaging around 0°C (31°F), reaching a maximum of 16°C (60°F). The month sees slightly higher precipitation levels at 135 mm (5.3 in), also spread over 15 days, while the humidity rises to 87%. For those interested in specific weather patterns during this time, you can check out Saillon weather in March.
In September, the weather displays a greater warmth with average temperatures around 10°C (50°F), peaking at 23°C (73°F), compared to the cooler April averages of 4°C (39°F) and a maximum of 19°C (66°F). While September experiences 113 mm (4.5 in) of precipitation over 15 days, April has slightly less rainfall at 87 mm (3.4 in) across 12 days. Additionally, humidity levels are relatively high in both months, with September at 81% and April at 84%. For a more detailed overview of the climate during this spring month, you can check Saillon weather in April.
In comparing the weather between September and May, we observe notable differences. September generally offers milder conditions, with average temperatures around 10°C (50°F) and maximums reaching 23°C (73°F), while May experiences cooler averages of 7°C (45°F) and a minimum temperature that dips to -14°C (7°F). Both months receive a fair amount of precipitation, with September totaling 113 mm (4.5 in) over 15 days and May accumulating 191 mm (7.5 in) over 20 days, highlighting May as the wetter month. Humidity levels are relatively similar, with September at 81% and May slightly lower at 80%. For more detailed insights, you can check Saillon weather in May.
September and June exhibit notable differences in weather patterns. In September, temperatures range from a minimum of -6°C (22°F) to a maximum of 23°C (73°F), with an average of 10°C (50°F), while June features slightly warmer conditions, with a minimum of -3°C (27°F) and a maximum of 28°C (83°F), averaging 13°C (55°F). Furthermore, June experiences higher precipitation, totaling 177 mm (7.0 in) over 18 days compared to September's 113 mm (4.5 in) over 15 days. Humidity levels remain relatively similar, at 81% in September and 82% in June, contributing to the distinct feel of each month. For more details, check out Saillon weather in June.
In comparing the weather of September and July, we find notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums dipping as low as -6°C (22°F) and maximums reaching 23°C (73°F), averaging around 10°C (50°F). In contrast, July is significantly warmer, with temperatures ranging from a minimum of 1°C (35°F) to a maximum of 28°C (82°F), and an average of 14°C (58°F). Precipitation is also more abundant in July, totaling 182 mm (7.2 in) over 17 days, compared to September's 113 mm (4.5 in) across 15 days. Both months have similar humidity levels, with September at 81% and July slightly higher at 82%. For more detailed insights, visit Saillon weather in July.
September's weather presents a noticeable shift compared to August, with average temperatures dropping to 10°C (50°F) from August's 14°C (57°F). Notably, September experiences a lower maximum temperature of 23°C (73°F) compared to August's peak of 27°C (80°F). In terms of precipitation, September sees 113 mm (4.5 in) over 15 days, while August's total is higher at 173 mm (6.8 in) over 17 days. Despite slightly increased humidity in September at 81%, August remains the more humid month at 77%. For more detailed insights on August weather, visit Saillon weather in August.
In September, the weather typically features a wide temperature range, with minimums dropping to -6°C (22°F) and maximums reaching 23°C (73°F), resulting in an average of 10°C (50°F). The month experiences significant rainfall, totaling 113 mm (4.5 in) over about 15 days, and humidity levels hover around 81%. In contrast, October sees a noticeable decline in average temperature to 6°C (43°F), with maximums capping at 18°C (65°F) while still experiencing minimums of -6°C (22°F). Additionally, precipitation increases slightly to 131 mm (5.2 in) over 13 days, and humidity rises to 89%, creating a notably wetter and cooler atmosphere as autumn deepens. For more specific insights, you can explore Saillon weather in October.
September and November exhibit distinct contrasts in weather conditions. In September, temperatures range from a minimum of -6°C (22°F) to a comfortable maximum of 23°C (73°F), with an average of 10°C (50°F). This month experiences significant precipitation, totaling 113 mm (4.5 in) over approximately 15 days and maintaining a humidity level of 81%. In contrast, November sees much colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 16°C (61°F), resulting in an average temperature of -1°C (31°F). The precipitation slightly decreases to 101 mm (4.0 in) over 13 days, accompanied by an increase in humidity to 89%. For more detailed insights about the weather in November, you can visit Saillon weather in November.
In September, temperatures range from a chilly -6°C (22°F) at night to a mild 23°C (73°F) during the day, with an average of 10°C (50°F). The month sees 113 mm (4.5 in) of precipitation over 15 days, and humidity is relatively high at 81%. In contrast, December experiences much harsher conditions, with minimum temperatures plunging to -29°C (-21°F) and a daytime maximum of only 8°C (46°F), resulting in an average temperature of -6°C (21°F). Precipitation increases significantly to 213 mm (8.4 in) over 16 days, with humidity creeping up to 91%. For more details on December conditions, check out Saillon weather in December.
As September unfolds in Saillon, the weather takes on a unique charm, transitioning into a delightful blend of warmth and crispness. With temperatures that range from cool mornings to pleasantly warm afternoons, this month stands apart from the scorching summers, offering a refreshing atmosphere ideal for outdoor exploration. Although it experiences more precipitation than the preceding months, the vibrant landscapes and lush vineyards truly come to life under the soft, hazy sun. With an average humidity of 81%, the air feels refreshing, making it an enchanting time to visit. For more insights into Saillon's distinct climate, check out Saillon Climate.