Last updated: August 27, 2025
September in Saint-Ursanne, Switzerland offers a delightful blend of warm and cool weather, with temperatures peaking at a maximum of 29°C (84°F), while the average settles at a comfortable 15°C (59°F). However, the month can also bring a brisk chill, with temperatures dropping to a minimum of 1°C (34°F). Rainfall is a notable feature, with 82 mm (3.2 in) of precipitation spread over 12 days, contributing to the lush landscapes that define this picturesque region. The humidity sits at a cozy 81%, adding to the charm of early autumn in this historical town.
As September unfolds in Saint-Ursanne, Switzerland, the temperatures reflect a comfortable transition from the warmth of summer to the chill of autumn. With minimums around 1°C (34°F) and average highs reaching 29°C (84°F), this month serves as a sweet spot between the vibrant summer heat and the crispness that follows. The average temperature settles at about 15°C (59°F), making it an inviting time for outdoor adventures amidst the stunning fall foliage. As September progresses, you'll notice a subtle dip in temperatures, hinting at the cooler days ahead, while still allowing for pleasant afternoons bathed in sunlight. Embrace the beauty of this month, as it captures the essence of nature's changing palette in the heart of Switzerland.
In September, Saint-Ursanne experiences a modest precipitation total of 82 mm (3.2 in), marking a slight dip as summer transitions into autumn. This month typically sees about 12 rainy days, suggesting a gradual easing of rain compared to the wetter summer months, where precipitation peaked in May at 156 mm. Despite the decrease, September maintains a consistent trend with October following closely with an expected 104 mm of rain. This pattern reflects the region's characteristic seasonal cycle, where the lushness of summer gives way to the crispness of fall, inviting both change and continuity in Saint-Ursanne's picturesque landscape.
In September, Saint-Ursanne experiences a slight uptick in humidity, peaking at 81% after the summer months. This measure indicates a subtle transition towards the wetter months, as the humidity levels gradually climb from a low of 77% in August. As autumn approaches, the humidity begins to mirror the patterns seen in the preceding months, hinting at a forthcoming return to the higher levels typical of late fall and winter, which range from 89% to 91%. Overall, the shift in humidity underscores the region's changing climate, from the warm and somewhat drier late summer to the more humid and cooler autumn season.
In September, Saint-Ursanne experiences a UV Index of 6, categorizing it as high; this means that while sun protection is still necessary, it's less intense than the peak summer months. With a burn time of 25 minutes, residents and visitors alike should remain vigilant. This month marks a transition from the intense very high readings of July and August, where the UV Index reached 9, to a more moderate range typical of autumn. As temperatures begin to cool and days shorten, while the sun's rays are not as harsh, it’s essential to maintain skin protection habits. For more insights on UV exposure throughout the year, visit Saint-Ursanne UV Index.
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As the summer warmth begins to wane, September in Saint-Ursanne still boasts a generous 329 hours of sunshine, creating a gentle transition into autumn. Following the sun-drenched days of July, which stands at an impressive 418 hours, September marks a decline, yet it remains significantly brighter than the chillier months ahead. This month beautifully bridges the gap between the height of summer and the approaching fall, allowing locals and visitors alike to bask in the lingering warmth before the 281 hours of sunshine in October take hold. The overall trend showcases a gradual decrease in sunlight hours from the summer peak, but September stands out as a delightful conclusion to the sunny season, inviting outdoor activities amidst the breathtaking backdrop of the Swiss landscape.
September in Saint-Ursanne, Switzerland, offers a moderate chance of sunny weather, with 39% likelihood of sunshine. This marks a slight increase from the summer months, as July and August hover around 37% and 38%, respectively. As the region transitions into autumn, the sunny days begin to dwindle, yet September remains relatively bright compared to the earlier months of the year. With October's chance of sun dropping to 33%, September serves as a delightful window for enjoying the lingering warmth before the chill sets in, appealing to both locals and visitors alike.
As autumn approaches in Saint-Ursanne, Switzerland, the daylight duration begins to wane, with September offering around 12 hours of sunlight. This month marks a gentle transition from the summer's peak, where daylight reached up to 15 hours in June and July. As nature shifts, September’s 12 hours of daylight signals the end of long sunny days, following a gradual decline since August. This trend sets the stage for the cooler, darker months ahead, as daylight continues to decrease, dropping to 10 hours in October and further down to 8 hours by December. The ebb and flow of daylight not only highlights the changing seasons but also invites a time for reflection and renewal.
In September, the winds of Saint-Ursanne, Switzerland begin to calm, with average speeds dipping to 1.7 m/s (4 mph), marking a gentle transition into autumn. This decline follows a summer of slightly higher breezes, peaking at 2.8 m/s (6 mph) in May. The month is part of a trend where wind speeds generally fluctuate, showcasing a seasonal rhythm; after the lightest months in June, July, and August, September maintains this soft breeze, creating an inviting atmosphere. As the trees begin to don their fall colors, the subdued winds enhance the serene charm of the town, inviting leisurely strolls amidst the picturesque scenery.
Weather in Saint-Ursanne varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Ursanne, focusing on differences in temperature, rainfall, humidity, and UV levels.
September typically offers a wider temperature range, with minimums around 1°C (34°F) and maximums reaching up to 29°C (84°F), resulting in a pleasant average of 15°C (59°F). The month experiences moderate precipitation of 82 mm (3.2 in) over about 12 days, coupled with a humidity level of 81%. In contrast, January is characterized by much colder conditions, with minimum temperatures dropping to -14°C (8°F) and a significantly lower average of just 1°C (33°F). Although January sees slightly higher precipitation at 98 mm (3.9 in) across 13 days, the humidity increases to 91%, making the atmosphere feel much colder. For further details on what to expect, you can check Saint-Ursanne weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a cool 1°C (34°F) at night to a warm 29°C (84°F) during the day, with an average of 15°C (59°F). The month sees about 82 mm (3.2 in) of precipitation over approximately 12 days, accompanied by a humidity level of 81%. In contrast, February is significantly colder, with temperatures dropping to a minimum of -13°C (8°F) and a maximum of 17°C (64°F), yielding an average temperature of just 3°C (38°F). Precipitation remains similar, at 84 mm (3.3 in) over the same number of days, but humidity increases slightly to 89%. For a detailed look at February's climate, check out Saint-Ursanne weather in February.
In comparing the weather between September and March, we observe marked differences in both temperature and precipitation. September experiences milder temperatures, with lows around 1°C (34°F) and averages of 15°C (59°F), reaching a maximum of 29°C (84°F). The month typically sees about 82 mm (3.2 in) of precipitation over 12 days and has a humidity level of 81%. In contrast, March presents a chillier profile, with minimum temperatures dropping to -13°C (9°F) and an average of only 5°C (42°F), peaking at 21°C (69°F). March has a higher precipitation level at 100 mm (3.9 in) spread across approximately 16 days, accompanied by increased humidity at 87%. For a more detailed look at the weather in March, you can refer to Saint-Ursanne weather in March.
When comparing the weather in September and April, notable differences emerge. September enjoys a warmer climate, with temperatures ranging from a chilly 1°C (34°F) at night to a pleasant maximum of 29°C (84°F) during the day, while April sees a cooler range from -5°C (23°F) to a mild 25°C (77°F). Precipitation levels are slightly higher in September, with 82 mm (3.2 in) spread over about 12 days compared to April's 67 mm (2.6 in) over 11 days. Humidity is also high in both months, with September at 81% and April slightly higher at 84%. For a more detailed look at April's climate, check out Saint-Ursanne weather in April.
When comparing the weather in September and May, there are notable differences in temperature and precipitation. September generally enjoys a milder range of temperatures, with a minimum of 1°C (34°F) and an average of 15°C (59°F), peaking at 29°C (84°F). In contrast, May starts cooler, with a minimum of -1°C (30°F) and an average of 13°C (55°F), though it also reaches similar highs at 29°C (85°F). Precipitation is significantly higher in May, totaling 156 mm (6.1 in) over 18 days compared to September's 82 mm (3.2 in) across 12 days. Humidity levels remain comparable, with May at 80% and September slightly higher at 81%. For more details, visit Saint-Ursanne weather in May.
September and June exhibit notable differences in weather patterns. September temperatures range from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), with an average of 15°C (59°F). In contrast, June temperatures are generally warmer, with a minimum of 5°C (41°F) and a maximum of 33°C (92°F), averaging at 18°C (64°F).
Precipitation levels also vary, with September experiencing 82 mm (3.2 in) over 12 days and June seeing a higher total of 141 mm (5.6 in) over 17 days, indicating a wetter month. Humidity remains quite similar, with September at 81% and June slightly higher at 82%. For more detailed information, you can check Saint-Ursanne weather in June.
In comparing the weather of September and July, we notice distinct differences that mark the transition from summer to autumn. July experiences higher temperatures, with minimums around 8°C (46°F) and maximums reaching up to 35°C (95°F), whereas September sees a lower temperature range with minimums at 1°C (34°F) and maximums peaking at 29°C (84°F). Additionally, July tends to be more humid, with an average humidity of 82%, compared to September's 81%. Precipitation is notably higher in July as well, with 150 mm (5.9 in) over about 15 days, while September brings 82 mm (3.2 in) across 12 days. For a more detailed look at July's weather, you can visit Saint-Ursanne weather in July.
September generally sees cooler temperatures compared to August, with minimums dropping to 1°C (34°F) and averages around 15°C (59°F), while August maintains higher minimums at 6°C (44°F) and averages of 19°C (66°F). The maximum temperatures in September reach up to 29°C (84°F), a notable decrease from August's peak of 33°C (92°F). Additionally, September experiences less precipitation than August, with 82 mm (3.2 in) over 12 days, compared to August's 152 mm (6.0 in) over 16 days. Humidity levels are slightly higher in September at 81%, while August has a relative humidity of 77%. For more details, you can check Saint-Ursanne weather in August.
September presents a warm transition into autumn, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), averaging around 15°C (59°F). The month sees about 82 mm (3.2 in) of precipitation over 12 days, accompanied by a humidity level of 81%. In contrast, October ushers in cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 23°C (73°F), averaging 10°C (50°F). This month experiences slightly higher precipitation at 104 mm (4.1 in) over 13 days and increased humidity at 89%. For more details on the October climate, check out Saint-Ursanne weather in October.
September and November present notably different weather patterns. In September, temperatures range from a mild 1°C (34°F) at night to a warm 29°C (84°F) during the day, averaging around 15°C (59°F). Precipitation during this month is relatively moderate, with 82 mm (3.2 in) over 12 days and humidity sitting at 81%. In contrast, November ushers in cooler temperatures, with nighttime lows dropping to -4°C (25°F) and daytime highs reaching only up to 20°C (68°F), averaging just 4°C (40°F). The month also sees a slight increase in precipitation, totaling 84 mm (3.3 in) across 13 days, and humidity rises to 89%. For a closer look at how November weather unfolds, check out Saint-Ursanne weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a mild 1°C (34°F) at night to a warm 29°C (84°F) during the day, with an average of 15°C (59°F). The month sees 82 mm (3.2 in) of precipitation over about 12 days, coupled with a humidity level of 81%. In stark contrast, December experiences much colder conditions, with temperatures dipping as low as -8°C (18°F) and peaking at 13°C (56°F), averaging just 2°C (36°F). The precipitation increases significantly to 138 mm (5.4 in) across 19 days, and humidity rises to 91%. For more details on December weather, visit Saint-Ursanne weather in December.
As September unfolds in Saint-Ursanne, the weather brings a notable transition from the summer heat to a cooler embrace. With a maximum temperature reaching around 29°C and an average hovering near 15°C, it's a month that still radiates warmth, though the crispness of autumn begins to creep in. September is also recognized for its increased precipitation, with 12 days of rain contributing to the region's lush landscapes. The humidity remains relatively high at 81%, making the air feel quite saturated. This blend of warmth and moisture sets September apart from the drier and warmer summer months, signaling a shift towards the more introspective beauty of fall. To explore more about this charming month's climate, visit Saint-Ursanne Climate.