Last updated: August 27, 2025
Experience the enchanting September weather in Adelboden, Switzerland, where temperatures fluctuate from a cool -5°C (23°F) at night to a pleasant 22°C (72°F) during the day. On average, you can expect a crisp 9°C (49°F), perfect for those who appreciate the beauty of the autumn season. However, be prepared for some rain, as September brings approximately 131 mm (5.1 in) of precipitation over about 16 days, contributing to the lush landscape. With a humidity level of 81%, the air can feel a bit damp, enhancing the freshness of the mountain surroundings. Whether you're hiking through colorful foliage or enjoying cozy evenings indoors, September in Adelboden offers a unique blend of crisp air and stunning natural beauty.
In September, Adelboden, Switzerland, begins to transition from the warmth of summer to the crispness of fall. The minimum temperature dips to a cool -5°C (23°F), giving way to an average of 9°C (49°F), while the maximum can reach a pleasant 22°C (72°F). This month marks a significant shift from the higher temperatures of August, as the days gradually shorten and the alpine landscape prepares for the coming winter. The mild weather, juxtaposed with cooler evenings, creates an inviting atmosphere for outdoor adventures, making it an ideal time for hikers and nature enthusiasts to explore the stunning alpine scenery before the snowfall begins.
In September, Adelboden experiences a notable transition in precipitation, with the month receiving 131 mm (5.1 in) of rainfall over 16 days. This amount is less than the heavy downpours of summer, yet it maintains a consistent lushness as the region shifts into autumn. The rainfall in September is lower than the preceding months of July and August, which each saw more than 196 mm, but it still holds its ground when compared to the drier spring months. As the cooler temperatures begin to take hold, September's rainfall contributes to the vibrant hues of fall foliage that envelop this picturesque Swiss village. Overall, the precipitation pattern reflects a gradual tapering off from the summer’s peaks, setting the stage for the upcoming months.
As summer transitions to autumn in Adelboden, Switzerland, September experiences a slight rebound in humidity, averaging around 81%. This marks a subtle increase from August's 77%, reflecting a seasonal shift as temperatures cool and moisture levels begin to rise again. Throughout the year, humidity remains relatively high, peaking at 91% during the winter months. The gradual decline from the early to mid-year months—dropping from 91% in January to 80% in May—is followed by a small elevation in September, hinting at the onset of autumnal dampness. This trend underscores Adelboden's characteristic climatic cycle, weaving together a rich tapestry of seasonal changes.
In September, the UV Index in Adelboden, Switzerland, settles at a moderate 7, indicating a high exposure category and a potential burn time of about 25 minutes. This marks a gradual decline from the peak summer months, where UV levels soared to extreme heights. The easing of UV intensity in September signals a transition towards milder autumn conditions, yet awareness remains crucial as the sun can still pose risks. For those planning outdoor activities, it’s wise to stay informed and protect your skin accordingly. For more detailed information, check out the Adelboden UV Index.
UV Risk Categories
As summer transitions into autumn, September in Adelboden, Switzerland continues to bask in a generous amount of sunlight, with 323 hours illuminating the picturesque landscape. This month marks a subtle decline from the vibrant heights of July, which boasts 416 hours of sunshine, yet still glimmers with abundant daylight compared to the cooler months ahead. The warmth of September draws visitors looking to enjoy the stunning alpine scenery before the winter sets in, making it a delightful time for hikers and nature enthusiasts alike. With the sunlight gradually softening as it gives way to October’s 288 hours, September remains a shining jewel in the early autumn season, inviting all to relish its fleeting warmth and beauty.
As summer gives way to autumn, September in Adelboden, Switzerland, sees a modest 30% chance of sunny weather. This figure aligns with the trend of sunshine probabilities during the late summer months, remaining stable compared to August's 30%. Interestingly, while September offers similar sunlit days, the approaching fall brings an increase in sunny prospects from the months preceding it, notably those of May through July, which linger in the lower 20s to mid-30s percentile. Notably, the chances of sun begin to rise again in October, reaching 42%, suggesting that while September may not be the sunniest month, it can still provide delightful weather for those seeking a charming alpine getaway.
As summer gently fades into autumn, September in Adelboden, Switzerland, offers a balanced 12 hours of daylight, marking a noticeable transition from the longer, sun-drenched days of summer. While June, July, and August bask in their peak with 15 hours of daylight, September begins to hint at the shorter days ahead, mirrored by the gradual decrease in daylight that begins in October. This month serves as a bridge, blending the warm hues of late summer with the crisp onset of fall, offering residents and visitors alike the perfect opportunity to enjoy the stunning alpine scenery before daylight slips away to just 10 hours in October. The rhythmic ebb and flow of daylight throughout the year not only highlights nature's cycles but also invites everyone to savor every sunlit moment as the seasons change.
As autumn begins to embrace Adelboden, Switzerland, September experiences a gentle lull in wind speeds, averaging 1.1 m/s (2 mph). This marks the month with the lightest breezes of the year, following a consistent trend of slightly diminishing wind from the summer's 1.2 m/s. The tranquil atmosphere invites travelers to soak in the beauty of the surrounding alpine landscape, as the calm winds weave through the picturesque valley, creating an inviting backdrop for outdoor activities. As the season transitions, the hint of chill in the air signifies the approach of crisper days, yet without the turbulent gusts typical of other months, making September a perfect time for reflection and exploration in this stunning Swiss haven.
Weather in Adelboden varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Adelboden, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather experiences. In September, the temperatures range from a chilly -5°C (23°F) to a pleasant 22°C (72°F), with an average of 9°C (49°F). This month sees about 131 mm (5.1 in) of precipitation across 16 days, accompanied by a humidity level of 81%. In contrast, January is considerably colder, with temperatures dipping as low as -26°C (-14°F) and averaging -7°C (20°F), peaking at just 7°C (46°F). The precipitation increases slightly to 174 mm (6.8 in) over 12 days, and the humidity rises to 91%. For more details on January conditions, you can visit Adelboden weather in January.
September and February present distinctly different weather conditions. In September, temperatures range from a chilly -5°C (23°F) at night to a warm 22°C (72°F) during the day, with an average of 9°C (49°F). The month typically sees around 131 mm (5.1 in) of precipitation over 16 days and a relative humidity of 81%. In contrast, February experiences much colder weather, with temperatures dipping as low as -22°C (-8°F) and peaking at just 11°C (53°F), averaging -3°C (26°F). Precipitation levels are slightly higher at 132 mm (5.2 in), but it falls over just 11 days, and humidity levels rise to 89%. For more detailed insights, check out Adelboden weather in February.
In September, temperatures in Adelboden range from a chilly -5°C (23°F) at night to a pleasant 22°C (72°F) during the day, with an average temperature of 9°C (49°F). The month sees significant rainfall, totaling 131 mm (5.1 in) over 16 days, and humidity levels are relatively high at 81%. In contrast, March experiences much colder conditions, with night temperatures dropping to -24°C (-11°F) and daytime highs reaching only 14°C (58°F), averaging -1°C (31°F). This month also has slightly more precipitation at 161 mm (6.3 in) across the same number of days, coupled with even higher humidity at 87%. For a deeper look at March weather in Adelboden, you can visit Adelboden weather in March.
September and April present distinct weather patterns indicative of their respective transitional seasons. September typically sees milder temperatures, with averages around 9°C (49°F) and maximums reaching 22°C (72°F), making it a more pleasant month overall. In contrast, April is cooler, averaging only 3°C (37°F) and experiencing minimum temperatures as low as -15°C (5°F). While September has greater precipitation at 131 mm over 16 days, April still brings a significant amount of rain, totaling 99 mm across 12 days. Humidity levels are also quite high in both months, with April slightly higher at 84% compared to September's 81%. For a more detailed look at conditions during this time, check out Adelboden weather in April.
When comparing the weather in September and May, we find notable differences in temperature and precipitation. September typically sees milder temperatures with a minimum of -5°C (23°F) and an average of 9°C (49°F), peaking at a comfortable 22°C (72°F). In contrast, May has a colder minimum of -11°C (12°F) and an average of 7°C (44°F), but reaches a slightly higher maximum of 24°C (75°F). Precipitation levels are also higher in May, with 223 mm (8.8 in) falling over 21 days compared to September's 131 mm (5.1 in) across 16 days. Overall, while both months experience high humidity (around 80-81%), May tends to be wetter and cooler than September. For more specific insights, you can refer to Adelboden weather in May.
In comparing September and June weather, it's clear that June tends to be warmer, with average temperatures reaching 12°C (54°F) compared to September's 9°C (49°F). The maximum temperature in June can soar up to 29°C (84°F), while September's maximum is a more modest 22°C (72°F). Both months experience significant precipitation, with June receiving 184 mm (7.2 in) over 20 days and September seeing 131 mm (5.1 in) spread across 16 days. Humidity levels are comparable, with September at 81% and June slightly higher at 82%. For a more detailed look at June weather, you can visit Adelboden weather in June.
When comparing the weather in September and July, it's clear that July tends to be warmer and wetter. In July, average temperatures range from a minimum of 2°C (36°F) to a maximum of 28°C (83°F), while September sees a broader range with a minimum of -5°C (23°F) and a maximum of 22°C (72°F). Precipitation is notably higher in July, totaling 224 mm (8.8 in) over 20 days, compared to September's 131 mm (5.1 in) across 16 days. Despite slightly higher humidity levels in July at 82%, both months experience relatively high humidity, making them feel quite different from one another. For more specifics about July weather conditions, you can check Adelboden weather in July.
In comparing the weather between August and September, September tends to be cooler, with average temperatures ranging from a minimum of -5°C (23°F) to a maximum of 22°C (72°F), while August enjoys milder conditions with temperatures from 1°C (35°F) to 26°C (78°F). Furthermore, September experiences more precipitation over fewer days, totaling 131 mm (5.1 in) across 16 days, compared to August's 196 mm (7.7 in) spread over 20 days. Humidity levels are slightly higher in September at 81% compared to August's 77%. For more specific details, you can check Adelboden weather in August.
In September, temperatures in Adelboden typically range from a minimum of -5°C (23°F) to a maximum of 22°C (72°F), with an average temperature of 9°C (49°F). The month sees about 131 mm (5.1 in) of precipitation over 16 days, accompanied by a humidity level of 81%. In contrast, October experiences cooler temperatures, with a minimum of -7°C (19°F) and a maximum of 18°C (66°F), bringing the average down to 5°C (41°F). Precipitation increases slightly to 151 mm (5.9 in) over 13 days, and humidity rises to 89%. For more detailed information, check out the link: Adelboden weather in October.
September and November present stark differences in weather conditions. September boasts a milder temperature range, with minimums around -5°C (23°F) and maximums reaching 22°C (72°F), averaging at a comfortable 9°C (49°F). The month experiences significant precipitation of 131 mm (5.1 in) over about 16 days, with humidity levels at 81%. In contrast, November ushers in much colder temperatures, with minimums plummeting to -18°C (0°F) and an average of -1°C (31°F). Although the maximum temperature can still reach 16°C (60°F), the overall atmosphere becomes significantly chillier and more humid, with 107 mm (4.2 in) of precipitation across 12 days and humidity levels rising to 89%. For a more detailed view of November's weather in Adelboden, you can visit Adelboden weather in November.
In September, the weather in Adelboden is marked by milder temperatures, with a minimum of -5°C (23°F) and an average of 9°C (49°F), peaking at a comfortable 22°C (72°F). However, the month also sees significant rainfall, totaling 131 mm (5.1 in) over 16 days, with humidity levels around 81%. In stark contrast, December brings much colder conditions, with temperatures plunging to a minimum of -26°C (-15°F) and an average of -6°C (22°F). The maximum temperature in December is only 7°C (44°F), and the precipitation increases to 248 mm (9.8 in) across 18 days, accompanied by higher humidity at 91%. For more details on December weather, you can check Adelboden weather in December.
September in Adelboden marks a transition into a cooler season, where the warmth of summer gives way to crisp autumn air. With temperatures averaging around 9°C (49°F), it’s noticeably chillier than the preceding months, while maximums rarely touch 22°C (72°F) and can dip to -5°C (23°F) at night. This month also witnesses increased precipitation, averaging 131 mm (5.1 in) over 16 days, contributing to the lush landscapes as nature prepares for the winter months ahead. The humidity remains high at 81%, adding to the refreshing yet damp feel in the air. Overall, September offers a unique blend of vibrant fall colors and a refreshing climate, making it a picturesque time to visit. For additional insights into the seasonal shifts, explore the detailed overview here: Adelboden Climate.