Last updated: August 21, 2025
September in Clervaux, Luxembourg offers a dynamic climatic experience marked by temperature fluctuations ranging from a comfortable maximum of 32°C (89°F) to a refreshing minimum of 2°C (36°F). The average temperature settles at a mild 14°C (57°F), creating an inviting atmosphere for outdoor enthusiasts. While weather enthusiasts may notice 70 mm (2.7 in) of precipitation spread over 10 days, the humidity levels hover around 83%, contributing to a lush and vibrant landscape. Whether basking in the sun or enjoying the crisp air, September presents a unique blend of warmth and refreshment in this picturesque town.
September in Clervaux, Luxembourg, marks a delightful transition into autumn, showcasing a mix of warm days and cooler nights. With minimum temperatures around 2°C (36°F) and an average of 14°C (57°F), the month gently shifts away from the summer heat, giving way to a comfortable climate perfect for outdoor activities. The maximum temperature can still reach a pleasant 32°C (89°F), reminiscent of the lingering summer warmth. As the month progresses, the crispness in the air becomes more evident, inviting visitors and residents alike to enjoy the vibrant foliage that characterizes this charming season.
September in Clervaux, Luxembourg, brings a mild shift in precipitation patterns, with 70 mm (2.7 in) of rain accumulated over 10 days. This marks a slight decrease from the wetter summer months, where August saw a similar amount of rainfall but over a longer duration of 16 days. Interestingly, September’s rain contributes to the overall easing of the wet conditions experienced earlier in the season, bridging the transition into the drier autumn months. As the year progresses, the precipitation tends to fluctuate, with the impending October predicted to ramp back up to 83 mm (3.3 in). Overall, September serves as a gentle reminder of the changing seasons, offering just enough rain to nourish the landscape while hinting at the crispness of fall ahead.
In Clervaux, Luxembourg, September brings a slight uptick in humidity, averaging around 83%. This marks a transition from the drier summer months, where humidity dipped to 80% in August, to the wetter conditions characteristic of autumn. As the year progresses, moisture levels become more pronounced, climbing back towards the higher figures recorded in late fall and winter, with October averaging 89% and peaking at 93% in December. This pattern highlights the region's distinctive seasonal shifts, with September serving as a bridge between the warm, moderate summer air and the increasingly damp conditions of autumn.
As summer fades and September arrives in Clervaux, Luxembourg, residents experience a noticeable shift in the UV Index, which drops to 6, indicating a high exposure category and a burn time of 25 minutes. This marks a decline from the intense very high levels seen in the peak summer months, offering a more moderate yet still cautionary environment for sun exposure. While the need for sunscreen remains essential, the earlier months of the year exhibit a stark contrast with their significantly lower indices, reflecting a gradual transition towards milder weather. Many will appreciate the balance of sunshine without as much urgency for protection, making outdoor activities more pleasant. To stay informed and safe, check out more about the UV Index here: Clervaux UV Index.
UV Risk Categories
September in Clervaux, Luxembourg, shines with 315 hours of sunlight, marking a gentle transition as summer wanes into autumn. This month reflects a notable decline from the sun-drenched days of June and July, which boast more than 400 hours each, yet it still offers a vibrant array of sunny moments. As the year progresses towards October's 229 hours, September serves as a delightful bridge, ushering in cooler temperatures while still retaining a generous dose of brightness. The gradual decrease in sunlight hours highlights the shifting seasons, inviting locals and visitors alike to savor the warm, golden light before the crispness of fall takes hold.
In September, Clervaux, Luxembourg experiences a 39% chance of sunny weather, marking a modest upswing compared to the summer months. While the chances are notably higher than those in the winter months, such as January and December, they do not quite match the allure of spring, where sunlight peaks at 47% in April. Despite the decline seen during the late summer, September presents a more favorable environment for outdoor activities, as the warmth of summer lingers. Overall, this month offers a delightful blend of seasonal transition, making it a lovely time to savor the last rays of sunshine before autumn fully sets in.
In Clervaux, Luxembourg, the daylight duration experiences a captivating ebb and flow throughout the year. As September approaches, the lingering warmth of summer begins to wane, bringing a gentle decline in daylight hours. With 12 hours of sunlight, September marks a notable transition from the longer days of summer, peaking at 16 hours in June, to the shorter spells as autumn sets in. The month stands as a bridge, where the remaining daylight still offers ample opportunities for outdoor activities, yet hints at the upcoming months of shorter days, with October falling to 10 hours. This gradual shift not only signals changing seasons but also invites residents and visitors alike to savor the last warm days of the year.
As September rolls in Clervaux, Luxembourg, a noticeable shift occurs in the gentle breeze that sweeps through the region. With an average wind speed of just 2.5 m/s (6 mph), it becomes the calmest month of the year, signaling a transition from the vibrant summer to cooler autumn days. This drop in wind speed, following a gradual increase during the warmer months, underscores a trend of decreasing breeziness as nature prepares for the changing seasons. Interestingly, after the blustery winds typical of late spring and early summer, September’s whispering winds create a serene atmosphere, inviting moments of reflection amidst the breathtaking landscape.
Weather in Clervaux varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Clervaux, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing September and January weather, September typically experiences milder conditions with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 32°C (89°F) and an average of 14°C (57°F). The month sees about 70 mm (2.7 in) of precipitation over approximately 10 days, with humidity averaging 83%. In contrast, January is notably colder, with temperatures dipping to a minimum of -15°C (6°F) and peaking at 11°C (52°F), averaging just 1°C (35°F). January also has a slightly higher precipitation of 80 mm (3.1 in) spread over 13 days, along with a humidity level of 91%. For a more detailed look at January weather, check out Clervaux weather in January.
September and February present notably different weather conditions. In September, temperatures range from a mild 2°C (36°F) at night to a warm 32°C (89°F) during the day, with an average of 14°C (57°F). The month sees about 70 mm (2.7 in) of precipitation over approximately 10 days, accompanied by a relatively high humidity of 83%. In contrast, February is much colder, with minimum temperatures dropping to -12°C (11°F) and maximums reaching only 18°C (65°F), averaging around 3°C (38°F). Precipitation in February is slightly higher at 77 mm (3.0 in), occurring over 12 days, while humidity increases to 90%. For a detailed look at February weather in the region, you can check Clervaux weather in February.
When comparing the weather between September and March, notable differences emerge. September typically sees warmer temperatures, with an average of 14°C (57°F) and a maximum reaching 32°C (89°F), while March is much cooler, averaging only 5°C (42°F) and a maximum of 21°C (70°F). Precipitation is slightly higher in March, totaling 91 mm (3.6 in) over 16 days, compared to September's 70 mm (2.7 in) over 10 days. Additionally, humidity is slightly higher in March at 88% versus September's 83%, making the early spring months feel more damp and chilly. For more specific details, you can check Clervaux weather in March.
When comparing the weather in September and April, notable differences emerge in temperature and precipitation. September generally enjoys warmer temperatures, with averages around 14°C (57°F) and highs reaching 32°C (89°F), while April's average sits at a cooler 9°C (48°F), peaking at 25°C (78°F). Despite both months experiencing around 10 days of precipitation, September receives more rainfall at 70 mm (2.7 in) compared to April's 44 mm (1.7 in). Humidity levels are quite similar, with September at 83% and April slightly higher at 84%. For a more detailed look at April's conditions, you can check Clervaux weather in April.
When comparing the weather in September and May, a few key differences emerge. September typically sees a wider temperature range, with minimums reaching 2°C (36°F) and maximums climbing to 32°C (89°F), while May features slightly cooler conditions, with minimums at -1°C (30°F) and maximums reaching 29°C (85°F). Precipitation levels are relatively close, with September averaging 70 mm (2.7 in) over about 10 days and May totaling 81 mm (3.2 in) across roughly 14 days. Humidity is slightly higher in September at 83%, compared to May's 81%. For more detailed insights about the weather in May, you can visit Clervaux weather in May.
When comparing the weather between September and June, both months offer a wide range of temperatures, with highs reaching up to 32°C (89°F). However, September tends to start off a bit cooler, featuring a minimum temperature of 2°C (36°F) compared to June's cooler minimum of 6°C (42°F). The average temperatures in September are slightly lower at 14°C (57°F) versus June's 17°C (63°F). In terms of precipitation, September has 70 mm (2.7 in) of rainfall over an average of 10 days, while June experiences a bit more precipitation at 86 mm (3.4 in) across 12 days. Humidity levels are quite similar, with September at 83% and June at 82%. For a more detailed view of June weather specifically in Clervaux, you can visit Clervaux weather in June.
When comparing the weather in September and July, September tends to be milder with an average temperature of 14°C (57°F), compared to July's warmer average of 18°C (64°F). The maximum temperatures also reflect this difference, with September reaching up to 32°C (89°F) and July peaking at a hotter 36°C (98°F). Despite July being more humid with levels at 82% compared to September’s 83%, it experiences slightly more precipitation at 79 mm (3.1 in) over 11 days, while September sees 70 mm (2.7 in) over 10 days. For more detailed insights on July weather, you can check the link: Clervaux weather in July.
In comparison to August, September experiences a notable drop in average and minimum temperatures. While August holds a warmer average of 18°C (64°F) with minimums around 5°C (41°F), September's averages dip to 14°C (57°F) and a minimum of just 2°C (36°F). Additionally, September sees a slightly reduced maximum temperature of 32°C (89°F) compared to August's highs of 34°C (93°F). Precipitation in September is also significant, with about 70 mm (2.7 inches) falling over 10 days, whereas August receives a bit more rain at 77 mm (3.0 inches) over 16 days. Humidity levels remain comparable, with September at 83% and August at 80%. For more detailed insights on Clervaux weather, you can visit Clervaux weather in August.
In September, the weather is characterized by a wider range of temperatures, with a minimum of 2°C (36°F) and a maximum that can reach up to 32°C (89°F), resulting in an average of 14°C (57°F). This month experiences relatively less precipitation, totaling 70 mm (2.7 in) over approximately 10 days, and has a humidity level of 83%. In contrast, October sees cooler temperatures, where the minimum can drop to 0°C (33°F) and the maximum peaks at 23°C (74°F), leading to an average temperature of 10°C (50°F). It also experiences slightly higher precipitation, accumulating 83 mm (3.3 in) across about 12 days, coupled with increased humidity of 89%. For a closer look at how October weather impacts local conditions, check out Clervaux weather in October.
September typically exhibits a much warmer climate compared to November, with average temperatures reaching 14°C (57°F) and a maximum of 32°C (89°F), while November sees a significant drop, with an average of just 5°C (41°F) and highs of 18°C (64°F). Both months experience similar levels of precipitation—approximately 70 mm (2.7 in) in September and 68 mm (2.7 in) in November—but November has slightly more rainy days, totaling 12 compared to September's 10. Additionally, humidity levels are higher in November at 91%, compared to 83% in September. To learn more about what to expect, you can check out Clervaux weather in November.
In comparing the weather conditions of September and December, we see a notable shift in temperature and precipitation patterns. September enjoys a wider temperature range, with minimums around 2°C (36°F) and maximums reaching up to 32°C (89°F), making it a generally warmer month with an average of 14°C (57°F). In contrast, December brings much colder temperatures, with averages around 3°C (38°F) and maximums peaking at just 13°C (56°F), while minimums can dip to -5°C (23°F).
Precipitation also differs significantly; September records about 70 mm (2.7 in) with rainfall occurring on roughly 10 days, whereas December experiences increased precipitation of 123 mm (4.9 in) spread over 19 days, indicating a wetter month. The humidity is higher in December at 93%, compared to 83% in September, contributing to the colder feel. For more details, you can check Clervaux weather in December.
As September unfolds in Clervaux, it presents a transition from the warmth of summer to the coolness of autumn. The days can still reach a maximum of 32°C, offering a hint of summer's lingering embrace, but the overall atmosphere shifts towards cooler averages and brisk evenings. This month is also characterized by a noticeable increase in humidity at 83%, contributing to a fresh, crisp feel in the air. Notably, September brings about a mild increase in precipitation, with 10 rainy days totaling 70 mm, which can result in a lush, vibrant landscape. To explore more about the unique Clervaux climate throughout the year, visit Clervaux Climate.