Last updated: August 27, 2025
In September, La Chaux-de-Fonds experiences a delightful blend of seasonal transition, with maximum temperatures reaching as high as 27°C (82°F) and a comfortable average of 14°C (58°F). As the month progresses, the weather shifts to cooler nights, dipping to a minimum of 3°C (37°F). The region sees a moderate precipitation total of 90 mm (3.6 in), distributed over approximately 13 days, reflecting the lush, vibrant landscapes typical of early autumn. High humidity levels at 81% create a refreshing atmosphere, perfect for exploring the scenic charm of this Swiss town during a tranquil September.
In September, La Chaux-de-Fonds begins to transition into autumn, with temperatures reflecting this shift. The minimum temperature hovers around 3°C (37°F), just enough to feel the chill of the changing season, while the average rises to a comfortable 14°C (58°F). With a maximum reaching 27°C (82°F), early September can still feel quite warm, especially during the day. This month stands out as a perfect blend of lingering summer warmth and the early whispers of fall, encouraging outdoor exploration and showcasing the stunning landscapes of the region as the leaves start to turn.
September in La Chaux-de-Fonds, Switzerland, typically sees 90 mm (3.6 in) of precipitation over about 13 days. This marks a slight drop from the more humid summer months, with both July and August boasting higher rainfall totals of 146 mm and 136 mm respectively. The transition into autumn is evident as the rainfall decreases, allowing the vibrant colors of fall foliage to take center stage. Despite this decrease, September's precipitation establishes a solid foundation for the wetter months ahead, foreshadowing October's average of 113 mm. The trend of fluctuating rainfall reflects the dynamic climate of this picturesque region, where each season contributes uniquely to the landscape.
As summer transitions into autumn, September in La Chaux-de-Fonds, Switzerland, witnesses a slight uptick in humidity, reaching around 81%. This marks a modest increase from August’s 77%, indicating the gradual return of the dampness that characterizes the upcoming fall months. The trend throughout the year showcases a notable peak in winter, with January and December maintaining high humidity levels of 91%. However, after reaching a seasonal low in August, September serves as a bridge back to the more humid months ahead, reinforcing the city’s cool, damp climate that is typical for this region.
As September dawns in La Chaux-de-Fonds, the UV Index experiences a noticeable shift, settling at 6, categorized as high. This marks a decline from the intense summer months, where the UV Index peaked at 9 in both June and July. With a burn time of 25 minutes, residents and visitors should remain vigilant while enjoying the crisp early autumn air outdoors. The gradual decrease in UV intensity from the previous months reminds us of the importance of sun protection as we transition into fall. For detailed insights throughout the year, be sure to check the La Chaux-de-Fonds UV Index.
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In September, La Chaux-de-Fonds basks in a delightful 332 hours of sunshine, marking the gradual transition into autumn. This month showcases a distinct trend as daylight begins to wane compared to the sun-drenched summer months, where July and June recorded impressive highs of 418 and 400 hours respectively. Despite this decrease, September retains a warm glow, reflecting a notable balance between summer's lingering warmth and the upcoming chill of fall. As the year progresses, the sunshine hours dip significantly, with October and November bringing 277 and 216 hours respectively, signifying a clear seasonal shift. Yet, September serves as a charming bridge, inviting residents and visitors alike to enjoy the lingering warmth before the winter shadows begin to loom.
September in La Chaux-de-Fonds, Switzerland offers a moderate chance of sunny weather, with approximately 34% likelihood of sunshine. As summer draws to a close, the sunshine potential remains relatively stable, following a slight dip from August's 37%. This trend reflects the shifting seasons, as September transitions into the cooler autumn months. Interestingly, the city has its highest chances of sun in early spring, particularly in March and April, suggesting that while September may not be the sunniest month, it offers a pleasant balance of light as the vibrant hues of fall begin to emerge. As you plan your September activities, expect a mix of sun and clouds, making it a great time to explore the scenic landscapes of the region.
As summer fades, September in La Chaux-de-Fonds brings a noticeable shift in daylight, offering about 12 hours of sunlight. While this marks a decline from the 15 hours enjoyed in the heart of summer months like June and July, it's still a comforting stretch compared to the shorter days that follow. The gradual reduction in daylight begins in August and continues into October, hinting at the inevitable embrace of autumn. This transition not only signals the changing seasons but also invites a unique charm, as the landscape starts to wear its colorful fall attire, making September a beautiful bridge between the vibrant summer and the cozy, dimmer days ahead.
As autumn approaches in La Chaux-de-Fonds, the September winds gently caress the landscape, with an average speed of just 1.7 m/s (4 mph)—the calmest breeze of the year. This notably lower wind speed reflects a trend towards stillness as summer gives way to fall. In contrast, the earlier months show a more consistent breeze, maintaining around 2.8 m/s (6 mph), particularly from January through May, hinting at the lively energy of spring and early summer. However, as the seasons shift, the winds settle into a quieter rhythm, suggesting a peaceful transition into the cooler months ahead. Indeed, the tranquil air of September serves as a perfect backdrop for enjoying the vivid autumn foliage that begins to unfold.
Weather in La Chaux-de-Fonds varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Chaux-de-Fonds, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in La Chaux-de-Fonds range from a mild 3°C (37°F) at night to a pleasant maximum of 27°C (82°F) during the day, with an average of 14°C (58°F). The weather is relatively humid at 81%, and the region experiences about 90 mm (3.6 in) of precipitation over 13 days. In contrast, January brings much colder temperatures, with nighttime lows plummeting to -16°C (3°F) and an average of 0°C (32°F), peaking at a maximum of 13°C (56°F). The humidity rises slightly to 91%, and precipitation increases to 121 mm (4.8 in), also spread over 13 days. For detailed weather insights, you can check La Chaux-de-Fonds weather in January.
September and February present contrasting weather conditions, reflecting the transition between summer and winter. 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 experiences about 90 mm (3.6 in) of precipitation over 13 days, paired with a humidity level of 81%, making it a relatively comfortable month for outdoor activities.
In stark contrast, February's temperatures dip significantly, with a minimum of -13°C (8°F) and a maximum of 16°C (62°F), averaging just 2°C (36°F). This winter month also sees comparable precipitation of 93 mm (3.6 in) over 12 days, but with a higher humidity of 89%, contributing to a chilly and damp atmosphere. For more detailed insights on February weather, you can visit La Chaux-de-Fonds weather in February.
When comparing the weather in September and March, notable differences emerge. September tends to be much warmer, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (82°F), averaging around 14°C (58°F). In contrast, March experiences colder conditions, with minimum temperatures dropping to -13°C (8°F) and an average of 5°C (41°F), peaking at 20°C (68°F). Additionally, March has higher precipitation levels of 126 mm (5.0 in) over 16 days compared to September's 90 mm (3.6 in) over 13 days. Humidity is slightly higher in March at 87%, while September registers at 81%. For more detailed information about March weather, you can visit La Chaux-de-Fonds weather in March.
Comparing the weather in September and April reveals notable differences in temperature and humidity. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 27°C (82°F), while April sees a chillier range from -6°C (21°F) to 24°C (75°F). Despite the warmer averages in September, both months exhibit relatively high humidity, with September at 81% and April slightly higher at 84%. Precipitation levels are also noteworthy; September receives 90 mm (3.6 in) of rainfall over 13 days, compared to April's 69 mm (2.7 in) over 12 days. For a more detailed look at April's climatic conditions, check out La Chaux-de-Fonds weather in April.
When comparing the weather in September and May, notable differences arise in temperature and precipitation. September typically sees a minimum temperature of 3°C (37°F) and an average of 14°C (58°F), with a maximum peaking at 27°C (82°F). In contrast, May has a lower minimum temperature of -2°C (28°F) and an average of 12°C (54°F), while still reaching a maximum of 28°C (82°F) on warmer days. Precipitation levels also vary, with September experiencing 90 mm (3.6 in) across 13 rainy days, whereas May is considerably wetter with 166 mm (6.5 in) over 19 days. Interestingly, humidity levels remain relatively consistent between the two months, hovering around 81% in September and 80% in May. For those interested in a more detailed analysis of May weather, visit La Chaux-de-Fonds weather in May.
In comparing the weather between 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), while June is warmer, boasting a minimum of 6°C (43°F) and a maximum of 33°C (91°F). June also experiences higher precipitation, totaling 150 mm (5.9 in) over 17 days compared to September's 90 mm (3.6 in) across 13 days, making it a wetter month overall. Despite both months having similar humidity levels—September at 81% and June at 82%—the comfort levels differ due to the temperature variations. For detailed insights into June weather, you can check La Chaux-de-Fonds weather in June.
In comparing the weather of September and July, we see some notable differences. September tends to be cooler, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (82°F) and an average of 14°C (58°F). In contrast, July is warmer, featuring temperatures from a minimum of 8°C (47°F) to a maximum of 34°C (93°F), with an average temperature of 18°C (65°F). Additionally, July experiences more precipitation, amounting to 146 mm (5.8 in) over 16 days, compared to September's 90 mm (3.6 in) over 13 days. Humidity levels are quite similar, with September at 81% and July at 82%. For more detailed information on July's weather, you can visit La Chaux-de-Fonds weather in July.
September weather shows a notable transition compared to August. While September experiences cooler temperatures with a minimum of 3°C (37°F) and an average of 14°C (58°F), August boasts milder temperatures, ranging from a minimum of 6°C (43°F) to an average of 18°C (64°F). Additionally, September sees less precipitation overall, with 90 mm (3.6 in) falling over 13 days, compared to August's 136 mm (5.3 in) across 17 days. The humidity in September is slightly higher at 81%, compared to August's 77%. For more details on the weather conditions in August, you can visit La Chaux-de-Fonds weather in August.
September's weather features a wider temperature range, with minimums around 3°C (37°F) and maximums reaching up to 27°C (82°F), creating generally mild days as the month transitions into autumn. In contrast, October sees a drop in average temperatures, with minimums falling to 0°C (33°F) and maximums peaking at 21°C (71°F), indicating a more pronounced chill in the air. Both months experience similar levels of precipitation, with October slightly wetter at 113 mm (4.5 in) compared to September's 90 mm (3.6 in), while humidity rises moderately from 81% to 89%. For a detailed look at what to expect, check out La Chaux-de-Fonds weather in October.
September and November present contrasting weather patterns. In September, temperatures typically 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). This month experiences about 90 mm (3.6 in) of precipitation over 13 days and a relative humidity of 81%. In sharp contrast, November sees a notable drop in temperatures, with minimums reaching -5°C (23°F) and an average temperature of just 4°C (40°F). The maximum temperature is also cooler at 18°C (65°F). Precipitation slightly increases to 99 mm (3.9 in) over 14 days, with humidity rising to 89%. For more detailed insights on the weather during this time, check out La Chaux-de-Fonds weather in November.
In September, the weather is considerably milder, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (82°F), and an average of 14°C (58°F). Precipitation is relatively moderate at 90 mm (3.6 in) over about 13 days, coupled with a humidity level of 81%. In contrast, December brings much colder conditions, with average temperatures dipping to a minimum of -8°C (18°F) and a maximum of 12°C (54°F), averaging just 2°C (35°F). The month is also wetter, with 175 mm (6.9 in) of precipitation spread over 19 days and slightly higher humidity at 91%. For a detailed look at the winter climate, visit La Chaux-de-Fonds weather in December.
As September unfolds in La Chaux-de-Fonds, the weather exhibits a transitioning charm, distinct from the summer warmth. With temperatures averaging around 14°C, this month offers a welcome respite from the heat, though the occasional maximum of 27°C can still be felt, allowing for some lingering summer days. However, as autumn approaches, cooler nights bring temperatures down to 3°C, indicating a shift in the season. Rain is a frequent visitor, with about 13 days of precipitation accumulating to 90 mm, creating a lush backdrop for the vibrant foliage. The humidity hovers around 81%, further enriching the atmosphere, making September a refreshing prelude to the crispness of fall. For a deeper understanding of the region’s climatic patterns, visit La Chaux-de-Fonds Climate.