Last updated: August 21, 2025
September in Schengen, Luxembourg presents a dynamic blend of weather elements, with temperatures ranging from a maximum of 32°C (89°F) to a cool minimum of 4°C (39°F). The average temperature hovers around a comfortable 15°C (59°F), making it an ideal time for outdoor exploration. However, visitors should also prepare for some rain, as the area experiences approximately 61 mm (2.4 in) of precipitation over about 9 days during the month. With humidity levels reaching 83%, the air can feel quite muggy at times, so layering clothing is recommended to enjoy the beauty of the Luxembourg countryside.
As summer gracefully transitions into autumn, September in Luxembourg offers a delightful blend of lingering warmth and crispness. With average temperatures around 15°C (59°F), this month showcases a significant dip from the scorching highs of July and August, which can reach up to 38°C (101°F). However, September still retains a hint of summer's embrace, with daytime highs peaking at an inviting 32°C (89°F). As the month unfolds, expect cooler evenings, with temperatures dropping to a minimum of 4°C (39°F). This delightful shift not only provides a comfortable climate for outdoor activities but also heralds the onset of the rich hues of autumn, making it a perfect time for exploring Luxembourg’s picturesque landscapes.
In September, Schengen, Luxembourg experiences a moderate precipitation amount of 61 mm (2.4 in) spread over 9 days. This marks a slight increase from the preceding months, with August's total at 59 mm despite having a longer duration of 12 days of rain. As the summer transitions to autumn, the rainfall begins to pick up, hinting at the approaching wetter season. Notably, September's precipitation sets the stage for October, which typically sees a more substantial total of 76 mm. This trend highlights a gradual shift towards greater precipitation as the year progresses, with December often peaking at 118 mm, making it the wettest month. Overall, September serves as a bridge, combining remnants of summer's warmth with the impending chill of autumn, reflected in its rainfall patterns.
In September, Schengen, Luxembourg, experiences a slight uptick in humidity, rising to 83% after a gradual decrease from the peak summer months. This month marks a transition as the humidity begins to climb again, following a low of 80% in August. As autumn approaches, the air becomes noticeably more laden with moisture, hinting at the return of the chillier months ahead. Notably, September's humidity level is still significantly lower than the heavy moisture found in the winter months, where averages soar back to the high eighties and nineties. This pattern reflects the region's shifting seasons, characterized by a brief resurgence of humidity before the impending cold.
As September arrives in Schengen, Luxembourg, the UV Index settles at 6, categorized as high, which signals a need for sun safety awareness. This marks a slight decrease from the summer's peak months, where the UV Index reached up to 9 in June and 8 in both July and May, showcasing the intense sun exposure during those warmer months. However, with a burn time of just 25 minutes, residents and visitors are reminded to take precautions while enjoying the last rays of summer. As the season transitions, maintaining vigilance against sun damage remains important; for further details on daily UV levels, check out Schengen UV Index.
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In September, Luxembourg basks in a delightful 313 hours of sunshine, showcasing a significant transition as summer gracefully wanes. This month captures the tail end of vibrant sunny days, comfortably nestled between July’s peak of 410 hours and the crisp autumnal air of October, which dips to 233 hours. Notably, while September enjoys a generous amount of sunlight compared to the gloomier winter months—like January’s mere 104 hours—it also signals the beginning of shorter days ahead. The sunshine trend observed over the warmer months reveals a steady rise from 104 hours in January to a splendid 406 hours in June, before settling into the moderate warmth of early autumn, inviting a reflective and scenic experience in the heart of Schengen.
In September, the chances of sunny weather in Schengen, Luxembourg rise to 40%, marking a notable improvement compared to the summer months of July and August, where the likelihood dips to 37% and 29% respectively. This shift suggests a transition into early autumn, when the sun begins to make more frequent appearances, albeit still less than the peak of spring in April at 51%. As the year progresses towards fall, the overall trend indicates fluctuating sunshine, with the likelihood decreasing again into October. So, if you're hoping for a mix of warmth and sun, September might just be your best bet before the colder months set in.
As summer fades in Schengen, Luxembourg, September ushers in a gentle decline in daylight hours, offering around 12 hours of daylight. This slight reduction marks a significant transition from the sun-drenched months of June and July, which boast their peak at 16 hours and 15 hours respectively. The gradual shortening of days is a prelude to autumn, as daylight steadily wanes through October and November, dipping to just 9 hours by month’s end. This rhythm of light reflects the seasonal change, inviting a cozy ambiance as nature prepares for winter's embrace.
As September unfolds in Schengen, Luxembourg, the gentle caress of the wind reveals a notable trend. With an average wind speed of just 2.4 m/s (5 mph), this month marks the calmest point of the year, showcasing a distinct drop from the breezier summer months. Prior to September, the winds danced at moderate speeds, peaking in May at 4.1 m/s (9 mph). August, too, held onto a lingering warmth with 3.0 m/s (7 mph). However, as autumn approaches, the whispers of September invite a serene ambiance, hinting at the shift in season and a momentary stillness before the wind picks up again in October, returning to 3.4 m/s (8 mph). This subtle ebb and flow not only reflects the changing weather but also enhances the tranquil charm of the scenic landscapes of Schengen.
Weather in Schengen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Schengen, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a cool 4°C (39°F) at night to a warm 32°C (89°F) during the day, with an average temperature of 15°C (59°F). Precipitation is moderate, with around 61 mm (2.4 in) over approximately 9 days, and the humidity sits at 83%. In contrast, January experiences much colder weather, with temperatures dropping to a minimum of -9°C (15°F) and only reaching a maximum of 13°C (55°F), averaging just 2°C (36°F). This month sees slightly higher precipitation at 70 mm (2.8 in) over around 11 days and a higher humidity level of 91%. For more detailed weather insights, check Schengen weather in January.
In September, temperatures range from a chilly 4°C (39°F) to a warm 32°C (89°F), with an average of 15°C (59°F) and relatively lower humidity at 83%. This month sees about 61 mm (2.4 in) of precipitation over nine days. In contrast, February experiences much colder weather, with temperatures plunging as low as -10°C (15°F) and reaching a maximum of 19°C (66°F), averaging only 4°C (40°F). The month also has higher precipitation at 73 mm (2.9 in) spread over 12 days, coupled with increased humidity at 90%. For more detailed insights into February weather, check out Schengen weather in February.
In September, temperatures range from a chilly minimum of 4°C (39°F) to a warm maximum of 32°C (89°F), averaging around 15°C (59°F). The month experiences relatively moderate precipitation of 61 mm (2.4 in) over about 9 days, with humidity levels at 83%. In contrast, March has a significantly cooler temperature profile, with lows plummeting to -11°C (13°F) and highs reaching up to 23°C (73°F), averaging 6°C (44°F). March sees slightly more precipitation at 75 mm (3.0 in) over 14 days, accompanied by high humidity levels of 88%. For more details about the weather during this time, you can check Schengen weather in March.
September and April present contrasting weather experiences, despite having similar patterns of precipitation and humidity. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 32°C (89°F), with an average of 15°C (59°F), offering a warmer and more summery feel. In contrast, April features cooler temperatures, with a minimum of -3°C (26°F) and a maximum of 27°C (80°F), averaging at 10°C (50°F). While both months experience precipitation over nine days, September receives a bit more rainfall at 61 mm (2.4 in) compared to April's 40 mm (1.6 in). For those interested in exploring the April weather in more detail, visit Schengen weather in April.
September and May showcase notable differences in weather patterns. September tends to have a wider temperature range, with minimums around 4°C (39°F) and maximums reaching up to 32°C (89°F), while May starts off cooler, with a minimum of 0°C (33°F) and an average of 13°C (56°F). Both months display fairly high humidity, hovering near 83% in September and 81% in May. In terms of precipitation, September records an average of 61 mm (2.4 in) over 9 days, whereas May sees slightly more rainfall at 70 mm (2.8 in) across 12 days. For a closer look at weather specifics in May, you can check this link: Schengen weather in May.
In September, temperatures range from a chilly 4°C (39°F) at night to a warm 32°C (89°F) during the day, averaging around 15°C (59°F). The month is characterized by higher humidity levels at 83% and experiences about 61 mm (2.4 in) of precipitation over approximately 9 days. In contrast, June offers slightly milder temperatures, with a minimum of 7°C (44°F) and a maximum of 34°C (94°F), averaging 18°C (65°F). Although June experiences a bit more rainfall at 70 mm (2.7 in) across 10 days, the humidity remains somewhat comparable at 82%. For more details on June weather, you can visit Schengen weather in June.
In comparing the weather of September and July, we see notable differences in temperature and precipitation patterns. September features a minimum temperature of 4°C (39°F), while July holds a warmer minimum of 8°C (47°F). The average temperatures also reflect this trend, with September averaging 15°C (59°F) compared to July's 19°C (67°F). Moreover, July peaks at a maximum of 38°C (101°F), substantially higher than September’s maximum of 32°C (89°F). In terms of precipitation, September receives 61 mm (2.4 in) over 9 days, whereas July has slightly more precipitation at 70 mm (2.8 in) across 8 days. Both months experience high humidity levels, with September at 83% and July slightly lower at 82%. For a detailed look at July's weather conditions, you can visit Schengen weather in July.
In comparing the weather between September and August, September generally experiences cooler temperatures, with a minimum of 4°C (39°F) and an average of 15°C (59°F), while August has a higher minimum of 7°C (44°F) and an average of 19°C (67°F). The maximum temperatures also reflect this difference, peaking at 32°C (89°F) in September compared to August’s maximum of 35°C (95°F). Both months have similar precipitation levels, with September recording 61 mm (2.4 in) over 9 days, slightly more than August's 59 mm (2.3 in) over 12 days. Additionally, humidity is slightly higher in September at 83%, compared to 80% in August. For more detailed information, you can check Schengen weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 32°C (89°F), averaging around 15°C (59°F). The month sees a total precipitation of 61 mm (2.4 in) over 9 days, with humidity sitting at 83%. In contrast, October brings cooler temperatures, with minimums dropping to 1°C (34°F) and maximums reaching 25°C (77°F), averaging just 11°C (52°F). Precipitation increases slightly to 76 mm (3.0 in) over 12 days, accompanied by a rise in humidity to 89%. For more detailed insights, you can check Schengen weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a cool 4°C (39°F) at night to a warm 32°C (89°F) during the day, with an average of 15°C (59°F). The month sees around 61 mm (2.4 in) of precipitation over approximately 9 days, combined with a humidity level of 83%. In comparison, November is much colder, with temperatures dipping to a minimum of -3°C (26°F) and reaching a maximum of 20°C (68°F), averaging only 6°C (43°F). This month experiences slightly higher precipitation at 70 mm (2.7 in) over 12 days and an increased humidity of 91%. For more detailed insights on the weather trends in November, you can check Schengen weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 32°C (89°F), with an average of 15°C (59°F), making it a much warmer month. The month also experiences moderate precipitation, totaling 61 mm (2.4 in) over approximately 9 days, with humidity at 83%. In contrast, December sees a significant drop in temperatures, with a minimum of -6°C (22°F) and a maximum of 14°C (58°F), leading to an average of just 4°C (40°F). This colder month also experiences increased precipitation, totaling 118 mm (4.6 in) over 19 days, and higher humidity at 93%. For more detailed insights about December weather, check out Schengen weather in December.
As September rolls in, Schengen's weather takes on a notable transition from the summer heat, providing a refreshing blend of mild temperatures and occasional showers. With an average temperature of around 15°C, this month stands out as a more comfortable escape from the scorching highs of August, while still allowing for warmer days that can reach up to 32°C. However, be prepared for the wet days, as September typically experiences a shift toward increased precipitation, marking a departure from the drier months preceding it. The high humidity levels further accentuate the month’s character, making it a time of year where layering becomes essential. To explore more about the climate dynamics in Schengen, visit Schengen Climate.