Last updated: August 21, 2025
In September, Bastogne, Belgium experiences a temperate transition, marked by a maximum temperature reaching up to 32°C (89°F) and a cooler average of 14°C (57°F). As the month progresses, temperatures can dip to a minimum of 2°C (35°F), showcasing the dramatic shifts typical of early autumn. The weather is accompanied by 77 mm (3.0 in) of precipitation over about 10 days, resulting in a relatively humid atmosphere at 83%. This blend of warmth and moisture creates a dynamic backdrop for exploring the rich history and natural beauty of Bastogne.
As September graces Bastogne, Belgium, the transition to autumn is undeniably felt in the air. With minimum temperatures hovering around 2°C (35°F) and a pleasant average of 14°C (57°F), the month offers a refreshing respite from the summer heat. Daytime highs can reach up to 32°C (89°F), making it one of the warmest times of the year. This marks a noticeable decline from the sweltering July and August temperatures, hinting at the cooler months ahead. As the leaves begin to change, September stands out as a delightful month where the crispness of fall begins to mingle with the lingering warmth of summer, inviting residents and visitors alike to enjoy the scenic beauty of Bastogne.
September in Bastogne, Belgium, sees a moderate precipitation amount of 77 mm (3.0 in), marking it as one of the drier months of the year. With only 10 days of recorded rainfall, it presents a noticeable decline in both precipitation volume and frequency compared to the wetter summer months, particularly August, which recorded 82 mm over 17 days. This trend highlights the gradual transition into autumn, as precipitation patterns become less frequent yet still significant compared to the preceding months. As the year progresses, Bastogne braces for increased rainfall in October and December, where totals leap back into heavier territory, emphasizing the region's dynamic climate patterns.
In Bastogne, Belgium, September marks a subtle transition in humidity levels as summer gives way to autumn. With an average humidity of 83%, the air feels comfortably cooler compared to the peak summer months, which hover around 80-82%. This slight increase indicates a shift in atmospheric conditions, as the lingering warmth of summer combines with the encroaching chill of fall. As the months progress, humidity levels will rise again, peaking at 91% in November and 93% in December, highlighting a cycle of higher moisture content in the colder months. Overall, the gradual fluctuations in humidity throughout the year reflect Bastogne's characteristic, damp continental climate.
As September rolls into Bastogne, Belgium, the UV Index reflects a noticeable shift from the scorching summer months. At a moderate score of 6, this indicates a high exposure category, with a burn time of just 25 minutes. This is a slight decline from the very high indices seen in May through August, where sun seekers had to be vigilant with an approximate burn time of only 15 minutes. As the days gradually shorten, September offers a more manageable sun exposure, yet it's essential to remain cautious. Embrace the waning warmth while protecting your skin by checking the detailed Bastogne UV Index to stay informed.
UV Risk Categories
September in Bastogne, Belgium, continues a vibrant trend of sunshine that peaks in the late summer months. With 315 hours of sunlight, the month enjoys a delightful balance, marking a decline from the sun-drenched days of July and August but still offering ample opportunities to bask in the golden glow. As the summer fades, this transition serves as a reminder of the warm days just past, while providing a charming autumn backdrop for locals and visitors alike. Overall, September's sunshine encapsulates the gradual shift in Bastogne's climate, leading into the cooler, shorter days of fall, yet still leaving a lasting impression of all the beauty this vibrant month has to offer.
In Bastogne, Belgium, the chances of enjoying a sunny September day stand at 38%, making it one of the more favorable months for sun-seekers as autumn approaches. This figure marks a significant improvement from the earlier summer months, where the likelihood of sunshine dips to 26-32%. Interestingly, September exceeds the sun chances of both May and August, suggesting a pleasantly surprising turn in weather patterns as the summer gives way to fall. While not guaranteed, these brighter days in September offer a wonderful opportunity to enjoy the picturesque landscapes of Bastogne before the cold sets in.
In September, Bastogne, Belgium, enjoys a pleasant transition as daylight gradually wanes to about 12 hours, signaling the onset of autumn. This month showcases a noticeable shift from the sun-drenched days of summer—where daylight peaked at 16 hours in June and remained generous at 15 hours in July and 14 hours in August. September's daylight hours are still lively enough to bask in the lush fall colors starting to emerge, yet they foreshadow the diminishing light as the year progresses. By October, the daylight dips further to 10 hours, reminding us that winter is just around the corner. As such, September stands as a beautiful bridge between the vibrant energy of summer and the cozy embrace of autumn, inviting residents and visitors alike to savor the changing season.
As autumn unfolds in Bastogne, Belgium, September brings a noticeable shift in the air, with an average wind speed of 2.6 m/s (6 mph), marking the calmest month of the year. This gentle breeze contrasts sharply with the springtime months, which feature more brisk winds averaging around 4.1 to 4.4 m/s (9 to 10 mph). The gradual decrease in wind speed throughout the summer, down from 3.4 m/s (8 mph) in July, hints at the seasonal transition, as the vibrant energy of summer gives way to the crispness of fall. With October projected to pick up slightly to 4.2 m/s (9 mph), the winds will soon stir again, reminding us of the dynamic changes that characterize the region's climate.
Weather in Bastogne varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bastogne, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Bastogne range dramatically, with a minimum of 2°C (35°F), an average of 14°C (57°F), and a maximum of 32°C (89°F), accompanied by relatively high humidity at 83%. The month sees about 77 mm (3.0 in) of precipitation over approximately 10 days. In stark contrast, January features much colder conditions, with temperatures dropping to a minimum of -15°C (5°F) and an average of just 1°C (34°F), peaking at 11°C (52°F). This month is slightly wetter, with 89 mm (3.5 in) of precipitation occurring over about 13 days and even higher humidity at 91%. For more information, you can check Bastogne weather in January.
In comparing the weather between September and February, we observe distinct differences in temperature and overall climate conditions. September typically features a wider temperature range, with minimums around 2°C (35°F) and maximums reaching up to 32°C (89°F), resulting in a pleasant average of 14°C (57°F). In contrast, February is much colder, with temperatures dropping to a minimum of -12°C (10°F) and an average of only 3°C (37°F), peaking at 18°C (65°F).
Moreover, both months experience significant precipitation; however, February sees slightly higher rainfall at 85 mm (3.4 in) over 13 days, compared to September's 77 mm (3.0 in) over 10 days. The humidity levels in February also tend to be higher at 90%, compared to a humid 83% in September. For more detailed insights, you can check Bastogne weather in February.
The weather comparison between September and March reveals notable differences in temperature and precipitation patterns. In September, the temperatures range from a chilly 2°C (35°F) to a warm 32°C (89°F), averaging around 14°C (57°F). With an average precipitation of 77 mm (3.0 in) over approximately 10 days, humidity levels sit at 83%. In contrast, March experiences much colder conditions, with temperatures dipping as low as -14°C (7°F) and peaking at 21°C (69°F), averaging only 5°C (41°F). This month also sees higher precipitation, totaling 102 mm (4.0 in) across about 17 days, and a slightly higher humidity of 88%. For a detailed look into March weather, you can explore Bastogne weather in March.
In comparing the weather of September and April, we observe notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums at 2°C (35°F) and maximums soaring to 32°C (89°F), averaging around 14°C (57°F). In contrast, April starts cooler, with minimums dipping to -4°C (25°F) but still reaches a comfortable max of 25°C (77°F), averaging 8°C (47°F). Additionally, while September sees a higher precipitation total of 77 mm (3.0 in) over 10 days, April has less rainfall at 49 mm (1.9 in) spread across 11 days. Humidity levels remain quite similar, with September at 83% and April slightly higher at 84%. For more information, you can check Bastogne weather in April.
September and May present distinct weather characteristics. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 32°C (89°F), with an average of 14°C (57°F). This month experiences 77 mm (3.0 in) of precipitation over approximately 10 days, accompanied by a high humidity level of 83%. In contrast, May has a slightly cooler temperature profile, with a minimum of -1°C (30°F) and a maximum of 29°C (84°F), averaging 12°C (54°F). Precipitation in May is a bit higher at 89 mm (3.5 in) across about 15 days, while humidity is slightly lower at 81%. For more detailed information on May weather, you can visit Bastogne weather in May.
In comparing the weather of September and June, September tends to have a slightly broader temperature range, with a minimum of 2°C (35°F) compared to June's minimum of 5°C (41°F). The average temperature in September is 14°C (57°F), which is marginally cooler than June's average of 16°C (62°F). Despite similar maximum temperatures—with September reaching up to 32°C (89°F) and June reaching 31°C (88°F)—September experiences higher humidity at 83% versus June's 82%. Additionally, September receives slightly less precipitation, totaling 77 mm (3.0 in) over about 10 days, while June sees more rainfall at 97 mm (3.8 in) across approximately 14 days. For more detailed information, you can check Bastogne weather in June.
When comparing the weather in September to that of July, we can observe some notable differences. September generally has a wider temperature range, with a minimum of 2°C (35°F) and a maximum of 32°C (89°F), resulting in an average temperature of 14°C (57°F). In contrast, July sees milder minimum temperatures of 6°C (43°F) and peaks at 36°C (96°F), averaging 17°C (63°F). Both months experience a similar amount of precipitation, with September averaging 77 mm (3.0 in) over 10 days and July slightly higher at 81 mm (3.2 in) over 12 days. The humidity levels remain comparable, with September at 83% and July slightly lower at 82%. For more insights on July weather specifics, you can visit Bastogne weather in July.
In comparing the weather patterns of September and August, September experiences slightly cooler temperatures, with a minimum of 2°C (35°F) and an average of 14°C (57°F), compared to August’s minimum of 4°C (40°F) and average of 17°C (63°F). While both months have similar maximum temperatures, September peaks at 32°C (89°F) against August’s 33°C (92°F). Precipitation is slightly less in September, totaling 77 mm (3.0 in) over 10 days, compared to August's 82 mm (3.2 in) over 17 days. Humidity remains relatively high in both months, with September at 83% and August at 80%. For further insights, check out Bastogne weather in August.
In September, the weather is marked by a broader temperature range, with nighttime lows around 2°C (35°F) and daytime highs reaching up to 32°C (89°F), making it generally warmer than October. The average temperature sits at 14°C (57°F), accompanied by 77 mm (3.0 in) of precipitation over 10 rainy days and a humidity level of 83%. Conversely, October sees a significant drop in temperatures, with minimums near 0°C (33°F) and a maximum of 23°C (73°F), resulting in an average temperature of 10°C (50°F). This month experiences slightly higher rainfall, totaling 92 mm (3.6 in) across 13 days, and humidity also increases to 89%. For a detailed look at the weather in October, check out Bastogne weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a mild 14°C (57°F) on average, with a maximum reaching up to 32°C (89°F), while November sees much colder averages around 5°C (41°F) and maximums of only 17°C (64°F), with minimums dropping to -5°C (24°F). Both months experience similar levels of precipitation, with September receiving 77 mm (3.0 in) over about 10 days and November slightly less at 74 mm (2.9 in) across 13 days. Additionally, humidity levels soar in November at 91%, compared to 83% in September, indicating a more damp and chilly atmosphere. For a deeper understanding of November’s weather, you can check out Bastogne weather in November.
In September, the weather is marked by a significant range in temperatures, with minimums around 2°C (35°F) and maximums reaching up to 32°C (89°F). The month experiences an average temperature of 14°C (57°F) along with 77 mm (3.0 in) of precipitation over approximately 10 days, resulting in a relatively humid environment with humidity levels around 83%.
In contrast, December brings a much colder climate, with minimum temperatures dropping to -5°C (22°F) and maximums peaking at 13°C (56°F). The average temperature for December is around 3°C (38°F), and the month sees a higher level of precipitation at 138 mm (5.4 in) over 19 days, contributing to a humidity level of 93%. For more information on December conditions, check out Bastogne weather in December.
September in Bastogne presents a notable transition from the warmth of summer to the crispness of autumn. With an average temperature of 14°C, it offers a refreshing respite from the peak summer heat, where highs can reach up to 32°C. However, this month also brings an increase in precipitation, with about 10 days of rain, contributing to the area's lush landscapes. The humidity level sits at a high 83%, making the air feel heavier, especially on rainy days. This blend of warmth and moisture creates a unique, invigorating atmosphere that sets September apart from other months of the year. For a deeper dive into what to expect seasonally in Bastogne, explore the detailed insights at Bastogne Climate.