Last updated: August 27, 2025
September in Le Locle, Switzerland offers a delightful transition from summer warmth to cooler autumn days. With maximum temperatures reaching around 27°C (82°F), the month presents a comfortable climate where the average temperature hovers at 14°C (58°F), while nights can dip as low as 3°C (37°F). Although the region encounters approximately 90 mm (3.6 in) of rainfall over 13 days, the air remains pleasantly humid at 81%, adding to the charm of this picturesque Swiss town. September is a beautiful time to experience Le Locle's vibrant landscape as it begins to don its autumn colors.
September in Le Locle, Switzerland ushers in a gentle transition from the warmth of summer to the crispness of autumn. With temperatures ranging from a refreshing 3°C (37°F) at night to a pleasant 27°C (82°F) during the day, this month offers a delightful average of 14°C (58°F). This marks a notable drop from the peak summer months, yet it's still warm enough for outdoor activities and exploring the breathtaking Swiss landscapes. The moderate temperatures and clear skies provide the perfect backdrop for enjoying the scenic beauty of the region as nature begins to don its autumnal attire. As the days gradually shorten, the arrival of September signals a charming blend of warmth and coolness, making it an ideal time for both locals and visitors to embrace the beauty of Le Locle.
September in Le Locle, Switzerland, showcases a moderate rainfall of 90 mm (3.6 in), making it one of the drier months compared to the preceding summer. With 13 precipitation days, the weather settles into a more predictable rhythm as autumn approaches, transitioning from the lush, rain-soaked months of May through August, which saw totals exceeding 136 mm. This slight reduction in precipitation is noteworthy, as it signals a shift towards cooler weather and sets the stage for the wetter months ahead, including October's average of 113 mm (4.5 in). Overall, September serves as a gentle reminder of the changing seasons, balancing the lush summer rains with the crisp early autumn air.
In September, the humidity in Le Locle, Switzerland measures 81%, marking a slight increase from the summer months. This period transitions from the drier air of August, which dips to 77%, signaling a shift as autumn approaches. As the year progresses, humidity levels generally rise again, with October returning to 89%. Throughout the year, a clear trend emerges: the winter months boast the highest humidity levels, reaching up to 91% in January and December. The gradual decline in humidity during late spring and summer months contrasts with the consistent moisture in the fall and winter, making September a pivotal moment where the last hints of summer warmth collide with the encroaching coolness of autumn.
As September rolls into Le Locle, Switzerland, residents and visitors experience a notable shift in the UV Index, which sits at a high rating of 6. This marks a decrease from the peak summer months, where values soared to 9 in July and June, indicating very high exposure risk. With a burn time of just 25 minutes, September urges vigilance as the sun's intensity remains significant, while also hinting at the approach of autumn. This transitional month showcases a favorable opportunity to enjoy the outdoors, but caution is still advised to protect against UV damage. To understand more about the changing levels of UV exposure throughout the year, check out the detailed insights at Le Locle UV Index.
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As summer fades and autumn approaches in Le Locle, Switzerland, September continues to bask in a generous 332 hours of sunshine. This delightful month reflects a subtle shift, with sunlight dwindling from the pinnacle of summer bright, where July saw an impressive 418 hours. The transition marks a gradual descent, with August trailing closely at 390 hours, yet September still holds onto a golden charm before the cooler months set in. This trend of decreasing daylight, from the vibrant 370 hours in May to the more muted 216 hours in November, encapsulates the beauty of change within Le Locle’s idyllic landscape, inviting residents and visitors alike to relish the increasingly crisp days, while embracing the rich tapestry of autumn hues.
In Le Locle, Switzerland, the likelihood of sunny weather in September stands at 34%, reflecting a slight decline from the peak sunshine of 49% in April. This month marks a transition towards the cooler autumn days, where the sunny chances are somewhat moderate compared to the vibrant summer months of July and August, which boast 35% and 37% respectively. As the summer warmth fades, September offers a balanced mix of sunny spells and the emerging crispness of fall, making it a delightful time for outdoor activities while also hinting at the frosty days ahead.
As summer gracefully transitions to autumn, September in Le Locle, Switzerland, experiences a gentle decline in daylight, offering about 12 hours of sunlight. This is a noticeable shift from the peak summer months of June to August, where the sun lingers for 15 and 14 hours, respectively. The trend reveals a gradual decrease in daylight from the height of 15 hours of daylight, starting to wane into October's 10 hours. This seasonal rhythm not only marks the arrival of cooler days but also invites a beautiful palette of fall colors, making each glowing sunset feel like a cherished moment before winter's shorter days set in.
In Le Locle, Switzerland, the September wind offers a gentle respite as the seasons shift toward autumn. With an average wind speed of 1.7 m/s (4 mph), September marks the lowest point of the year, showcasing a noticeable decline in breeziness following the slightly stronger gusts of summer. This softer wind, quieter than the brisker conditions of earlier months, invites a tranquil atmosphere perfect for enjoying the stunning fall foliage. As temperatures dip, the fading whispers of summer's balmy embrace give way to the crispness of autumn, creating an enchanting landscape where nature begins its transition. Overall, the trend reveals a gradual mellowing of the winds, setting the stage for cozy, seasonal changes ahead.
Weather in Le Locle varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Le Locle, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather patterns. In September, temperatures range from a mild 3°C (37°F) at night to a warm 27°C (82°F) during the day, with average conditions inviting outdoor activities. The month experiences about 90 mm (3.6 in) of precipitation over 13 days, coupled with a relatively high humidity level of 81%. In contrast, January brings much colder weather, with minimum temperatures plunging to -16°C (3°F) and a maximum of 13°C (56°F), resulting in an average temperature of around 0°C (32°F). January is also wetter, receiving 121 mm (4.8 in) of precipitation across the same number of days, with humidity increasing slightly to 91%. For a closer look at the frigid conditions, check out Le Locle weather in January.
In September, the weather is generally milder, with temperatures ranging from a low of 3°C (37°F) to a comfortable high of 27°C (82°F) and an average of 14°C (58°F). Precipitation is moderate at 90 mm (3.6 in) over 13 days, accompanied by a humidity level of 81%. In contrast, February experiences much colder temperatures, with a minimum of -13°C (8°F) and an average of 2°C (36°F), peaking at a maximum of 16°C (62°F). The precipitation is slightly higher at 93 mm (3.6 in) over just 12 days, coupled with increased humidity at 89%. For more detailed insights on February weather, you can explore Le Locle weather in February.
September and March present contrasting weather conditions. In September, the temperatures range from a minimum of 3°C (37°F) to a maximum of 27°C (82°F), with an average of 14°C (58°F). The month sees around 90 mm (3.6 in) of precipitation over approximately 13 days, and the humidity levels hover at 81%. In contrast, March experiences colder temperatures with a minimum of -13°C (8°F) and a maximum of 20°C (68°F), averaging just 5°C (41°F). Precipitation is higher in March at 126 mm (5.0 in), occurring over 16 days, and humidity rises slightly to 87%. For more detailed information, check out Le Locle weather in March.
In comparing the weather of September and April, we can observe notable differences in temperature and precipitation patterns. September boasts a milder range, with average temperatures between 3°C (37°F) and 27°C (82°F), while April presents cooler conditions, with temperatures dipping down to a minimum of -6°C (21°F) and peaking at 24°C (75°F). Although September experiences slightly higher precipitation at 90 mm (3.6 in) over 13 days, April follows closely with 69 mm (2.7 in) over 12 days. Humidity levels are fairly comparable, with September at 81% and April slightly higher at 84%. For those interested in more detailed information, you can check Le Locle weather in April.
September and May present contrasting weather patterns. In September, temperatures range from a cool 3°C (37°F) at night to a warm 27°C (82°F) during the day, with an average of 14°C (58°F). The month experiences less precipitation, totaling 90 mm (3.6 in) over 13 days and maintains a humidity level of 81%. In contrast, May features a wider temperature range with lows reaching -2°C (28°F) and highs soaring to 28°C (82°F), averaging around 12°C (54°F). It is significantly wetter, with 166 mm (6.5 in) of rain over 19 days, while the humidity slightly lags behind at 80%. For a detailed look at the conditions, check out Le Locle weather in May.
In comparing the weather of September and June, September tends to be cooler, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (82°F). In contrast, June enjoys warmer temperatures, reaching an average low of 6°C (43°F) and a high of 33°C (91°F). June also sees higher precipitation, with 150 mm (5.9 in) falling over 17 days, compared to September's 90 mm (3.6 in) over 13 days. Humidity levels are relatively similar, with September at 81% and June at 82%. For more detailed information, you can check Le Locle weather in June.
When comparing the weather of September and July, a noticeable difference in temperatures and precipitation levels emerges. September experiences a cooler range, with minimum temperatures dropping to 3°C (37°F) and an average of 14°C (58°F), while July is warmer, boasting a minimum of 8°C (47°F) and an average of 18°C (65°F). Additionally, July sees higher maximum temperatures, reaching up to 34°C (93°F), compared to 27°C (82°F) in September. Precipitation is also more pronounced in July, totaling 146 mm (5.8 in) over 16 days, versus September's 90 mm (3.6 in) over 13 days. Both months have similar humidity levels, around 81% in September and 82% in July. For a more detailed look, check out Le Locle weather in July.
Comparing the weather in September and August reveals a noticeable transition from summer to early autumn. In August, temperatures were warmer with a minimum of 6°C (43°F) and a maximum of 33°C (92°F), creating an average of 18°C (64°F). This month also experienced more frequent rain, with 136 mm (5.3 in) of precipitation over 17 days, and humidity levels at 77%. In contrast, September brought cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 27°C (82°F), leading to a lower average of 14°C (58°F). While September had less rainfall, totaling 90 mm (3.6 in) across 13 days, the humidity increased slightly to 81%. For a closer look at typical August weather, you can check Le Locle weather in August.
September and October present distinct shifts in weather patterns. In September, temperatures range from a mild minimum of 3°C (37°F) to a warm average of 14°C (58°F) and a maximum of 27°C (82°F). This month features 90 mm (3.6 in) of precipitation over 13 days, with a humidity level of 81%. In contrast, October sees cooler temperatures, with a minimum of 0°C (33°F), an average of 10°C (49°F), and a maximum of 21°C (71°F). Rainfall increases slightly to 113 mm (4.5 in), also spread over 13 days, and humidity rises to 89%. This transition marks a notable cooling as autumn progresses. For more information, you can check Le Locle weather in October.
September and November present quite contrasting weather patterns. In September, temperatures range from a mild 3°C (37°F) at night to a pleasant 27°C (82°F) during the day, with an average of 14°C (58°F). The month sees about 90 mm (3.6 in) of precipitation over 13 days, accompanied by a relatively high humidity of 81%. In comparison, November experiences cooler temperatures, with nighttime lows dipping to -5°C (23°F) and daytime highs reaching only 18°C (65°F), giving it an average temperature of 4°C (40°F). Rainfall increases slightly to 99 mm (3.9 in) across 14 days, and humidity rises to 89%. For more detailed information, check out Le Locle weather in November.
In September, the weather is noticeably warmer, with average temperatures hovering around 14°C (58°F) and reaching a maximum of 27°C (82°F). However, it can also be quite rainy, with precipitation totaling 90 mm (3.6 in) over about 13 days and humidity levels at 81%. By December, temperatures drop significantly, with an average of just 2°C (35°F) and lows plunging to -8°C (18°F). The precipitation increases to 175 mm (6.9 in) over 19 days, and humidity remains high at 91%. This stark contrast illustrates the shift from the mild, often rainy conditions of early autumn to the colder, wetter winter months. For more detailed information, you can refer to Le Locle weather in December.
September in Le Locle marks a transition from the warm summer days into the cooler embrace of autumn. With an average temperature of 14°C (58°F), the month offers a delightful respite from the sweltering heat of summer, yet the occasional warm day can still reach up to 27°C (82°F). This shift is accompanied by increased humidity levels at 81%, making the air feel a bit crisper as the vibrant colors of fall begin to emerge. While September does bring more frequent rain, totaling 90 mm across 13 days, these soothing showers add to the lush landscape, enhancing the region's natural beauty. For a comprehensive look at how Le Locle's weather evolves throughout the year, explore the detailed insights in Le Locle Climate.