Last updated: August 21, 2025
Experience the captivating September weather in La Roche-en-Ardenne, Belgium, where temperatures range from a chilly 1°C (35°F) at night to a warm maximum of 33°C (91°F) during the day. On average, you can expect a comfortable 14°C (58°F), making it an ideal time for outdoor exploration. However, with an average precipitation of 73 mm (2.9 in) over 10 days, don't forget to pack your umbrella! The month is characterized by a high humidity level of 81%, adding a touch of moisture to the air. Embrace the unique charm of this picturesque region as it transitions from summer warmth to the crispness of autumn.
As September rolls into La Roche-en-Ardenne, Belgium, the temperatures begin to showcase a delightful transition from summer warmth to the crispness of autumn. With minimums dipping to 1°C (35°F) and averages settling at a comfortable 14°C (58°F), the air takes on a refreshing quality that hints at the seasons changing. The max temperatures can still reach a balmy 33°C (91°F), reminiscent of late summer days. This month serves as a bridge, blending lingering warmth with the cool embrace of fall, making it an ideal time for outdoor adventures and appreciating the vibrant autumn foliage. As the warmth of summer gradually fades, September invites both locals and visitors to revel in its enchanting weather charms.
In September, La Roche-en-Ardenne experiences a moderate precipitation level, with 73 mm (2.9 in) of rain spread over just 10 days, making it one of the drier months of the year. This decline in rainfall is a refreshing transition from the wetter summer months, particularly August, which sees more frequent showers. However, as autumn approaches, the weather begins to shift, setting the stage for a wetter October. This pattern of reduced precipitation in September is part of a broader trend, as the region typically experiences fluctuating rainfall throughout the year, with December often bringing the highest totals. Overall, September’s climate presents a brief respite before the onset of fall rains.
In September, La Roche-en-Ardenne experiences a noticeable shift in humidity, with levels rising to 81% after the drier months of summer. This uptick reflects the transition towards autumn, as the region moves from the warm, comfortable humidity of July and August—which see averages as low as 71%—to the wetter conditions typical of fall. As the lush greenery begins to fade and temperatures cool, the increased humidity serves as a reminder of the impending seasonal change, foreshadowing the return of the more humid months of late autumn and winter, which average around 88% to 92% humidity. The contrast emphasizes La Roche-en-Ardenne's dynamic climate, where each month brings its own unique atmospheric character.
In September, La Roche-en-Ardenne experiences a UV Index of 6, placing it in the high exposure category with a burn time of 25 minutes. This marks a slight decline from the peak summer months of July and August, where the UV Index reached a maximum of 8. As autumn approaches, the trend shifts from the very high levels of summer, but caution is still advised, as September retains significant sun intensity. This seasonal transition serves as a reminder to stay vigilant about sun protection, especially during outdoor activities. For more details about the UV Index throughout the year, visit La Roche-en-Ardenne UV Index.
UV Risk Categories
September in La Roche-en-Ardenne, Belgium, brings a delightful transition into autumn, characterized by a notable 319 hours of sunshine. This marks a gentle decline from the peak summer months, with July and August basking in over 400 sunshine hours. As the days begin to shorten, September still retains a significant amount of sunlight compared to the chillier, cloudier months that follow. The gradual decrease from summer's abundance to the cozy embrace of fall creates a picturesque backdrop for outdoor activities, where locals and visitors alike can enjoy the lingering warmth of early autumn. While the sun may not shine as brightly as in the height of summer, September still promises vibrant days, perfect for exploring the scenic beauty of the Ardennes.
In La Roche-en-Ardenne, the likelihood of sunny weather in September sees a notable increase compared to the summer months, with a 38% chance of sunshine. While this is a refreshing uptick after the relatively cloudy days of August (27%) and a drop from the peak sunny moments of spring, it paints a promising picture for those eager to enjoy the early autumn charm. The trends throughout the year show a gradual rise in sunny days leading into the warmer months, peaking in June and July, before slowly receding again as the year progresses towards autumn. Thus, September presents a sweet spot for sun seekers, bridging the beautiful late summer vibes with the onset of fall’s vibrant hues.
As summer yields to autumn in La Roche-en-Ardenne, September brings a gentle decline in daylight to 12 hours—a subtle reminder of the changing seasons. Following the peak of 16 hours in June, the daylight duration gradually decreases, marking a shift from the long, vibrant days of summer to the cooler, shorter days of fall. This month captures the essence of transition; while the daylight begins to wane, the lush landscapes are still awash with the golden hues of early autumn, creating a picturesque backdrop for outdoor adventures. As we look ahead, October will further trim daylight to 10 hours, inviting a cozy retreat into the warmth of interiors and the charm of autumn festivities.
As September arrives in La Roche-en-Ardenne, a subtle shift in the breeze signals the transition from summer's warmth to autumn's embrace. With an average wind speed of 2.7 m/s (6 mph), September matches the gentle gusts of June and August, creating a serene atmosphere perfect for leisurely strolls through the lush landscapes. This marks a notable dip from the brisker speeds of earlier months, such as May and July, where winds picked up to 4.4 m/s (10 mph). As the leaves begin to turn and the air cools, this calmer wind invites locals and visitors alike to savor the tranquility of the region, making September a perfect month to explore the enchanting scenery of the Ardennes.
Weather in La Roche-en-Ardenne varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Roche-en-Ardenne, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in La Roche-en-Ardenne is notably warmer, with temperatures ranging from a minimum of 1°C (35°F) to a maximum of 33°C (91°F), averaging around 14°C (58°F). This month experiences about 73 mm (2.9 in) of precipitation over approximately 10 days, accompanied by a humidity level of 81%. In stark contrast, January brings much colder temperatures, with a minimum of -13°C (9°F) and a maximum of 12°C (54°F), averaging just 2°C (36°F). Precipitation in January increases to 91 mm (3.6 in), distributed over around 14 days, and humidity rises slightly to 91%. For a detailed look at January's typical weather, visit La Roche-en-Ardenne weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 1°C (35°F) to a maximum of 33°C (91°F), with an average of 14°C (58°F). The month sees around 73 mm (2.9 in) of precipitation over approximately 10 days, accompanied by a humidity level of 81%. In contrast, February features much colder temperatures, with a minimum of -10°C (13°F) and a maximum of 19°C (67°F), averaging at 4°C (39°F). Precipitation slightly increases to 85 mm (3.3 in) over 13 days, with humidity levels rising to 90%. For more details on February weather, you can check La Roche-en-Ardenne weather in February.
When comparing the weather in September and March, notable contrasts emerge. September experiences a broader temperature range, with minimums around 1°C (35°F) and maximums soaring up to 33°C (91°F), accompanied by a relatively moderate average of 14°C (58°F). In contrast, March tends to be much chillier, where temperatures can plummet to a minimum of -13°C (10°F) and peak at a pleasant 22°C (71°F), but with a lower average of only 6°C (43°F). Additionally, March sees more precipitation, totaling 101 mm (4.0 in) over 16 days, compared to September's 73 mm (2.9 in) across 10 days. The higher humidity in both months, with September at 81% and March at 87%, adds to the overall dampness in the air. For more details about March weather, visit La Roche-en-Ardenne weather in March.
When comparing the weather in September and April, notable differences emerge. September tends to be warmer, with average temperatures ranging from a minimum of 1°C to a maximum of 33°C, while April sees a wider range, from -5°C to 26°C. Humidity levels are fairly similar, with September at 81% and April slightly higher at 84%. Precipitation is also more frequent in September, totaling 73 mm over about 10 days compared to April's 46 mm over 11 days. For more specific details about April weather, you can visit La Roche-en-Ardenne weather in April.
When comparing the weather in September and May, it's evident that both months exhibit a diverse range of temperatures. September features a wider temperature range, with minimums of 1°C (35°F) and maximums reaching up to 33°C (91°F), while May has a slightly cooler scale, where the temperatures dip to a minimum of -1°C (31°F) and reach a maximum of 30°C (86°F). Interestingly, September averages a higher temperature at 14°C (58°F) compared to May's 12°C (54°F). Precipitation is also notable, with September receiving 73 mm (2.9 in) over approximately 10 days, and May slightly wetter with 81 mm (3.2 in) across 14 days. Humidity remains relatively high, with September at 81% and May a touch lower at 77%. For a more detailed look, check out La Roche-en-Ardenne weather in May.
The weather in September exhibits a wider range of temperatures compared to June, with minimums dipping to 1°C (35°F) and maximums reaching as high as 33°C (91°F), leading to an average of 14°C (58°F). In contrast, June offers milder temperatures with a minimum of 5°C (42°F) and a slightly higher average of 17°C (63°F), while maximums peak at 32°C (90°F). Both months experience significant rainfall, with September totaling 73 mm (2.9 in) over about 10 days and June just a bit wetter with 90 mm (3.5 in) over 14 days. Humidity is higher in September at 81%, compared to June's lower rate of 74%. For more detailed insights into June's weather, check La Roche-en-Ardenne weather in June.
In comparing the weather between September and July, September exhibits a broader temperature range with minimums as low as 1°C (35°F) and maximums reaching up to 33°C (91°F). This month maintains a cooler average temperature of 14°C (58°F) compared to July's warmer average of 18°C (64°F), where temperatures can soar to a striking 37°C (98°F). Precipitation is slightly higher in July at 86 mm (3.4 in) over approximately 12 days, while September sees 73 mm (2.9 in) across 10 days. Humidity levels are also notable, with September slightly more humid at 81% compared to July's 72%. For more insights into July's weather, you can visit La Roche-en-Ardenne weather in July.
In comparing the weather between September and August, September presented a broader temperature range, with a minimum of 1°C (35°F) and a maximum of 33°C (91°F), while August had milder temperatures, ranging from a minimum of 5°C (42°F) to a maximum of 35°C (95°F). The average temperature in September was 14°C (58°F), compared to August's warmer average of 18°C (64°F). Precipitation was relatively high in both months, with September receiving 73 mm (2.9 in) over 10 days, while August saw 83 mm (3.3 in) across 17 days. Additionally, September's humidity was slightly higher at 81%, compared to August's 71%. For more details, you can check La Roche-en-Ardenne weather in August.
September experiences a broader temperature range, with minimums dipping to 1°C (35°F) and maximums soaring to 33°C (91°F), while averaging around 14°C (58°F). In contrast, October's temperatures are cooler overall, with minimums at 0°C (33°F) and maximums peaking at 24°C (75°F), averaging just 11°C (51°F). Rainfall is also more pronounced in October, totaling 94 mm (3.7 in) over 14 days, compared to September's 73 mm (2.9 in) across 10 days. Additionally, October sees higher humidity levels at 88%, compared to September's 81%. For more detailed insights into October’s weather, check out La Roche-en-Ardenne weather in October.
In September, temperatures can range quite dramatically, with lows of 1°C (35°F) and highs reaching up to 33°C (91°F), while the average temperature hovers around a mild 14°C (58°F). This month also experiences around 73 mm (2.9 in) of precipitation over approximately 10 days, coupled with a humidity level of 81%. In contrast, November brings a noticeable chill with minimum temperatures dropping to -5°C (24°F) and an average of just 6°C (42°F). The maximum temperature in November is more temperate at 17°C (64°F), with similar precipitation levels at 69 mm (2.7 in) spread over 12 days and a higher humidity of 91%. For more details on the specific weather patterns in November, you can check La Roche-en-Ardenne weather in November.
September and December present quite a contrast in weather conditions. In September, temperatures range from a low of 1°C (35°F) to a high of 33°C (91°F), with an average of 14°C (58°F), making it a much warmer month overall. The humidity is relatively high at 81%, and the month receives about 73 mm (2.9 in) of precipitation over 10 days. In stark contrast, December is significantly cooler, with temperatures ranging from -5°C (23°F) to a maximum of 14°C (57°F) and an average temperature of just 4°C (39°F). Precipitation in December increases to 130 mm (5.1 in) over 20 days, and the humidity rises to 92%. These differences highlight the transition from the warm, more comfortable days of September to the cold, damp conditions typical of December. For more detailed insights, you can visit La Roche-en-Ardenne weather in December.
As September unfolds in La Roche-en-Ardenne, the weather begins to transition from the warmth of summer to the cooler embrace of autumn. With temperatures averaging around 14°C (58°F), this month is noticeably milder compared to the scorching heat of July and August, where peaks can reach a sweltering 33°C (91°F). While the chill can dip to a brisk 1°C (35°F) at night, September's 81% humidity and 73 mm of precipitation over an average of 10 days signal a shift, inviting cozy sweaters and warm drinks. Whether you're exploring the scenic trails or enjoying the local culture, this transitional month offers a refreshing charm that's distinctly different from the balmy summer days. For more detailed insights into the climate specifics, check out La Roche-en-Ardenne Climate.