Last updated: August 27, 2025
September in Neuchâtel, Switzerland offers a delightful blend of late-summer warmth and early autumn chill. Temperatures peak at a maximum of 28°C (82°F) while averaging a comfortable 14°C (58°F), with cool evenings dipping to a minimum of 3°C (37°F). The month sees about 83 mm (3.3 in) of precipitation across approximately 12 days, resulting in lush landscapes and vibrant foliage. With humidity levels resting at 81%, the air is pleasantly crisp, making it an ideal time for outdoor exploration and appreciating the beauty of the Swiss countryside.
In September, Neuchâtel experiences a delightful transition from the warmth of summer to the cooler embrace of autumn. The temperatures range from a mild minimum of 3°C (37°F) to a comfortable maximum of 28°C (82°F), with an average of 14°C (58°F) that invites outdoor activities. As the month progresses, the lingering warmth from August quickly begins to give way to the crispness of fall, marking the last chance for sunny outings before the chill sets in. This month showcases a beautiful blend of vibrant autumn colors and pleasant weather, making it an ideal time to explore the city's picturesque landscapes.
September in Neuchâtel, Switzerland experiences a notable transition in its weather patterns, marked by an average precipitation of 83 mm (3.3 in) across 12 days of the month. This amount reflects a dip from the summer's wetter months, where July and August saw higher rainfall totals of 145 mm and 130 mm, respectively. As autumn approaches, September's precipitation indicates a gradual shift towards cooler and drier conditions in the coming months, especially compared to the significantly wetter May, which recorded 159 mm. With fewer rainy days than the summer peak, this month provides a brief respite before the autumn rains begin to pick up again in October, forecasting 108 mm of precipitation. Overall, the trends reveal a seasonal ebb and flow, with September standing as a bridge between the lush summer and the impending chill of winter.
As summer transitions into autumn in Neuchâtel, Switzerland, September brings a slight uptick in humidity, averaging 81%. This increase follows the drier months of July and August, which both recorded 77% humidity, marking a notable dip from the year's peak levels. The trend continues to reflect the gradual shift from the warmer season to the cooler months. Interestingly, September's humidity is reminiscent of the preceding June, where it stood at 82%, suggesting a return to a more typical moisture level as the region prepares for the wetter fall and winter months ahead, which regularly hover around 89% in October and November.
As September rolls into Neuchâtel, Switzerland, residents and visitors can expect a moderate UV Index of 6, signaling a shift from the intense sun exposure of the summer months. This high category means a burn time of approximately 25 minutes for unprotected skin, reminding everyone to be mindful of sun safety even as autumn approaches. Unlike the scorching peak of July and August, which saw a UV index of 9, September offers a slight reprieve while still presenting a high risk for those enjoying the outdoors. This trend emphasizes the importance of adaptation as we transition from summer's vibrant rays to the cooler embrace of fall. For more detailed information on UV levels, you can visit Neuchatel UV Index.
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As the warmth of summer begins to fade, September in Neuchâtel offers a delightful transition with 332 hours of sunshine. While this marks a noticeable decline from the sun-drenched heights of July and August, which boasted 418 and 390 hours respectively, it still shines brighter than many other months. This trend highlights a gradual reduction in daylight as autumn approaches, yet September remains a cherished time to enjoy the lingering warmth and golden hues of early fall. The gradual decrease following the summer peaks reflects nature's rhythm, preparing both the landscape and its visitors for the cozy charm of the upcoming months.
September in Neuchâtel, Switzerland, enjoys a 35% likelihood of sunny weather, maintaining a stable trend seen throughout the summer months. While it's a slight dip from the peaks of spring and early summer—where March and April showcase a vibrant 45% and 49% chance of sunshine, respectively—September still offers a pleasant climate for outdoor activities. As the year transitions into autumn, the chances of sunshine linger, providing a delightful balance as the warm days begin to wane. This makes September an enticing time to explore the scenic beauty of Neuchâtel, as the sun still graces the landscape before winter approaches.
As summer gracefully transitions into autumn, September in Neuchâtel, Switzerland, offers a delightful blend of fading warmth and shortening days. With approximately 12 hours of daylight, September stands as a bridge between the sun-filled days of summer, which basked in up to 15 hours of light, and the encroaching gloom of autumn months, where daylight wanes to just 10 hours in October. The steady decline in sunlight from August's 14 hours highlights the gradual shift of seasons, ushering in a cozy ambiance that invites both reflection and preparation for the coming chill. Overall, September captivates with its lingering brightness, reminding us of the vibrant life that summer brought while gently embracing the allure of autumn's slower pace.
As autumn approaches in Neuchâtel, Switzerland, September ushers in a noticeable decline in wind speed, with an average of 1.6 m/s (4 mph)—the calmest month of the year. This gentle breeze contrasts sharply with the slightly more invigorating winds felt from May to August, where speeds lingered around 2.0 to 2.7 m/s (4 to 6 mph). Following a summer of moderate winds, the shift in September signifies a transition towards the cooler months ahead. Interestingly, the wind velocity begins to pick up again in October, hinting at a seasonal rhythm that invites both reflection and preparation for the winter's more brisk conditions, which resume with averages of 2.1 m/s (5 mph) in November.
Weather in Neuchatel varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Neuchatel, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present two starkly contrasting weather patterns. In September, temperatures range from a mild minimum of 3°C (37°F) to a warm maximum of 28°C (82°F), with an average of 14°C (58°F). The month experiences approximately 83 mm (3.3 in) of precipitation over 12 days, accompanied by a relatively high humidity of 81%. Conversely, January is characterized by frigid conditions, with temperatures plummeting to a minimum of -17°C (2°F) and only reaching a maximum of 14°C (58°F), translating to an average of 0°C (32°F). This month sees increased precipitation, totaling 109 mm (4.3 in) over the same 12 days, but with even higher humidity at 91%. For more details on the weather in January, visit Neuchatel weather in January.
When comparing the weather in September and February, it becomes clear that these months exhibit distinct seasonal characteristics. September boasts a milder temperature range, with minimums around 3°C (37°F) and maximums reaching up to 28°C (82°F), along with an average temperature of 14°C (58°F). In contrast, February experiences much colder temperatures, with minimums plummeting to -12°C (10°F) and daytime highs only reaching 17°C (62°F), giving it an average of just 2°C (37°F).
Additionally, both months receive similar amounts of precipitation, at 83 mm (3.3 in) for September and slightly more at 87 mm (3.4 in) for February, with precipitation occurring on about 12 days in each month. However, February's humidity is slightly higher at 89%, compared to September's 81%. To explore more about the conditions in February, you can visit Neuchatel weather in February.
September and March present contrasting weather conditions, with September experiencing milder temperatures ranging from a cool 3°C (37°F) to a warm 28°C (82°F) and an average of 14°C (58°F). In contrast, March is chillier, with temperatures dipping as low as -14°C (7°F) and averaging just 5°C (41°F), though it can reach a maximum of 20°C (68°F). While September sees precipitation of 83 mm (3.3 in) over about 12 days, March is wetter, with 114 mm (4.5 in) falling over approximately 15 days. Additionally, March has slightly higher humidity at 87%, compared to September's 81%. For more detailed information on March's weather, you can visit Neuchatel weather in March.
When comparing the weather in September and April, it's evident that September tends to be warmer, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 28°C (82°F), while April experiences cooler conditions, with temperatures ranging from -6°C (21°F) to 24°C (76°F). Although both months see similar precipitation days, with 12 days of rainfall, September has a slightly higher total precipitation of 83 mm (3.3 in) compared to April's 65 mm (2.6 in). Additionally, humidity levels are quite comparable, with September at 81% and April slightly higher at 84%. To explore more about April's climate, you can check Neuchatel weather in April.
When comparing the weather between September and May, we see some interesting contrasts. September features a mild temperature range with a minimum of 3°C (37°F) and an average of 14°C (58°F), peaking at a warm 28°C (82°F). In contrast, May starts cooler, with temperatures dipping to a minimum of -2°C (29°F) and an average of 12°C (54°F), though it can also reach a maximum of 28°C (84°F). Precipitation is notably higher in May, accumulating to 159 mm (6.3 in) over 18 days, compared to September's 83 mm (3.3 in) spread across 12 days. Humidity levels are similar, hovering around 81% in September and slightly lower at 80% in May. For more detailed information on May weather, check out Neuchatel weather in May.
When comparing the weather in September and June, notable differences emerge. September typically features a minimum temperature of 3°C (37°F) and an average of 14°C (58°F), while June enjoys warmer conditions, with minimums around 6°C (43°F) and an average of 17°C (63°F). The maximum temperatures in June can soar up to 33°C (91°F), compared to September's peak of 28°C (82°F). Additionally, June experiences more precipitation, averaging 135 mm (5.3 in) over 18 days, whereas September sees 83 mm (3.3 in) across 12 days. Humidity levels remain fairly similar, with September at 81% and June at 82%. For a more detailed overview, you can check Neuchatel weather in June.
When comparing the weather in September and July, notable differences emerge. September features a wider range of temperatures, with minimums dropping to 3°C (37°F) and maximums reaching up to 28°C (82°F), averaging around 14°C (58°F). In contrast, July experiences warmer conditions, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 34°C (94°F), maintaining an average of 18°C (66°F). Precipitation is generally more frequent in July, occurring over 17 days and totaling 145 mm (5.7 in), compared to September's 83 mm (3.3 in) over 12 days. Overall, while both months exhibit high humidity levels, July tends to be hotter and wetter than September. For a more detailed look at July conditions, visit Neuchatel weather in July.
In comparing the weather of September to August, one can observe notable differences in temperature and precipitation. September experiences a minimum temperature of 3°C (37°F) and an average of 14°C (58°F), with a maximum reaching 28°C (82°F). In contrast, August boasts warmer temperatures, with a minimum of 7°C (44°F), an average of 18°C (65°F), and highs of 33°C (92°F). Precipitation also varies significantly; September receives 83 mm (3.3 in) of rain over 12 days, while August sees a higher total of 130 mm (5.1 in) with rain on 17 days. Interestingly, despite September's cooler temperatures, it has a slightly higher humidity level at 81% compared to August's 77%. For a more detailed look at August weather, visit Neuchatel weather in August.
In September, the weather features a wider range of temperatures, with minimums around 3°C (37°F) and maximums peaking at 28°C (82°F), resulting in an average of 14°C (58°F). This month sees 83 mm (3.3 in) of precipitation over 12 days, accompanied by relatively high humidity of 81%. In contrast, October experiences a cooler climate, as temperatures drop to a minimum of 0°C (32°F) and an average of 10°C (50°F), while maximums reach only 22°C (72°F). The precipitation increases to 108 mm (4.3 in) over 13 days, and humidity rises to 89%. For more details, visit Neuchatel weather in October.
In September, temperatures range from a mild 3°C (37°F) at night to a warm 28°C (82°F) during the day, with an average of 14°C (58°F). The month sees about 83 mm (3.3 in) of precipitation over approximately 12 days, and the humidity is relatively high at 81%. In contrast, November brings a significant drop in temperatures, with lows plunging to -4°C (25°F) and highs reaching only 19°C (66°F), averaging around 4°C (40°F). Precipitation slightly increases to 90 mm (3.5 in) over 14 days, coupled with higher humidity at 89%. For more details on the weather patterns typical of this month, check out Neuchatel weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 3°C (37°F) at night to a warm 28°C (82°F) during the day, with an average temperature of 14°C (58°F). The month sees a total precipitation of 83 mm (3.3 in) over 12 days, accompanied by a relatively high humidity of 81%.
In contrast, December ushers in cooler temperatures, with nighttime lows dropping to -8°C (17°F) and daytime highs peaking at 12°C (54°F), resulting in an average of just 2°C (35°F). This month experiences significantly more rainfall, totaling 158 mm (6.2 in) across 19 days, alongside an increase in humidity to 91%. For more detailed information, you can check Neuchatel weather in December.
As September unfolds in Neuchâtel, the weather brings a unique charm distinct from the sweltering days of summer and the chilly embrace of autumn. With temperatures that reflect a gentle transition—averaging a comfortable 14°C—visitors can enjoy pleasant days, though cooler nights remind us that autumn is approaching. This month also sees increased humidity and precipitation, with about 12 days of rain, marking a shift towards the wetter season. The vibrant colors of autumn begin to paint the landscape, creating a picturesque backdrop for outdoor activities. To explore more about how Neuchâtel's climate varies throughout the year, check out Neuchatel Climate.