Last updated: August 21, 2025
In Mons, Belgium, September showcases a fascinating transition from summer to autumn, with a maximum temperature reaching 32°C (91°F), while the average cools to 15°C (60°F), dipping as low as 3°C (37°F) at night. This month experiences 53 mm (2.1 in) of rainfall spread over 9 days, contributing to the region's lush scenery. With a humidity level of 82%, visitors can expect a mild yet invigorating atmosphere, making it a perfect time to explore the charming streets of Mons while enjoying the changing colors of the season.
September in Mons, Belgium marks a delightful transition from the warm summer months into the cooler autumn season. With temperatures ranging from a minimum of 3°C (37°F) to a maximum of 32°C (91°F), this month often showcases the tail end of summer warmth while hinting at the cool weather ahead. The average temperature sits comfortably at 15°C (60°F), making it a pleasant time for outdoor activities and exploration. As the month progresses, you may start to feel the crispness in the air, a gentle reminder of the changing seasons, contrasting sharply with the sweltering highs experienced in July and August. This unique blend of warmth and cooler breezes makes September a charming time to experience the vibrant beauty of Mons.
September in Mons, Belgium, typically ushers in a shift in weather patterns, with average precipitation measured at 53 mm (2.1 in) over approximately 9 days. This marks a noticeable decline from the wetter months of summer, particularly August, which often sees more rain. The transition into autumn reflects a general trend of diminishing precipitation amounts, as seen from the heavier downpours earlier in the season. While September’s rainfall is modest compared to the peak in December, it still lays the groundwork for the wetter October ahead, ensuring that Mons remains lush and green. With the daylight fading and temperatures cooling, this month embodies the serene beauty of autumn’s arrival, punctuated by occasional drizzles.
As summer transitions into autumn, the humidity levels in Mons, Belgium begin to shift noticeably. In September, the humidity sits at 82%, which is slightly higher than August's 76% but still lower than earlier months like January and February that hover around the mid-nineties. This moderate humidity makes for a more comfortable atmosphere as the briskness of fall sets in. As we look ahead, the trend suggests a gradual increase, with October's humidity expected to rise to 89% and November hitting 92%. Thus, September stands as a pivotal point where the remnants of summer's warmth begin to blend with the cool, crisp air of the approaching autumn.
As summer fades and autumn approaches, September in Mons, Belgium brings a moderate UV Index of 5, suggesting a shift in the sun's intensity compared to the peak summer months. After experiencing the very high levels of UV exposure in July and August, this change allows for a more comfortable outdoor experience, but caution is still warranted with a burn time of 30 minutes for unprotected skin. As the days grow shorter and the sun’s rays become less direct, it’s a great time to enjoy the outdoors while staying sun-smart. For more detailed insights on UV levels throughout the year, check out Mons UV Index.
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In Mons, Belgium, the arrival of September signals a gentle transition into autumn, accompanied by a generous 322 hours of sunshine. This month follows a summery peak, with July and June boasting the highest sunlight hours of the year, reaching 412 and 403 hours, respectively. As summer fades, the daylight begins to wane, yet September's vibrant sun ensures that the days remain pleasantly warm, perfect for enjoying the scenic charm of the city. The trend reveals a steady decline in sunshine hours as the year progresses, from a high in May with 396 hours to a quieter October with 251 hours. This gradual shift not only marks the onset of fall but also showcases the beauty of Mons as it basks in the lingering warmth of summer sun.
In September, Mons, Belgium experiences a 36% chance of sunny weather, marking a slight uptick from the summer months. This moderate likelihood hints at the transition from the warmer summer to the cooler autumn, as the sunshine peaks in April at 52% but starts to wane as the year progresses. Compared to the earlier summer months, where sunshine chances hover around 29-34%, September offers a refreshing promise of sunlight. However, as autumn approaches, it’s essential to embrace the unpredictability of weather in Mons, since October follows with a similar 33% chance of sunshine, urging locals and visitors alike to enjoy the sun while it lasts.
As September unfolds in Mons, Belgium, the days begin to transition from the radiant height of summer to the gentler embrace of autumn. With an average daylight duration of 12 hours, September marks a distinct shift from the long, sunlit days of June, which boasts 16 hours. While still basking in more hours of light compared to the coming months, this decrease signifies the approach of shorter days ahead. The gradual decline aligns with the seasonal rhythm, echoing the trends seen from May through August, where daylight peaked at 15 and 14 hours. Thus, September serves as a bridge, blending the lingering warmth of summer days with the softening light that characterizes autumn's arrival.
As September rolls in, Mons, Belgium experiences a gentle shift in its wind patterns. With an average wind speed of 3.0 m/s (7 mph), the month sees a noticeable decrease from the breezier summer months, where winds hovered around 3.4 m/s (8 mph) in both July and August. This calming transition indicates a gradual approach toward autumn, reflected in the subsequent uptick in winds as the year progresses into October at 4.3 m/s (10 mph). September's mild breezes create a tranquil backdrop, making it an ideal time for leisurely strolls through the vibrant streets of Mons, while also hinting at the seasonal changes on the horizon.
Weather in Mons varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mons, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures are much warmer, ranging from a minimum of 3°C (37°F) to a pleasant average of 15°C (60°F), peaking at a maximum of 32°C (91°F). The month experiences relatively moderate precipitation at 53 mm (2.1 in) over about 9 days, with humidity around 82%. In contrast, January brings a significant chill, with temperatures dipping to a minimum of -7°C (20°F) and an average of just 4°C (39°F), reaching a maximum of 13°C (57°F). Precipitation increases slightly to 67 mm (2.6 in) spread over 12 days, accompanied by higher humidity at 91%. For more detailed information about January weather in the region, visit Mons weather in January.
In comparing the weather of September and February, we see a striking contrast. September boasts a milder range of temperatures, with minimums around 3°C (37°F) and highs reaching up to 32°C (91°F), while February experiences more frigid conditions, with lows dipping to -8°C (17°F) and maximums peaking at 18°C (65°F). Precipitation is more frequent in February, with rain occurring over 12 days and totaling 72 mm (2.9 in), compared to September's 53 mm (2.1 in) over 9 days. Additionally, the humidity levels are slightly higher in February at 89%, compared to September's 82%. For a detailed look at the weather specifics for February in Mons, check out Mons weather in February.
September and March present distinct weather patterns, reflective of their transitional seasons. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 32°C (91°F), with an average of 15°C (60°F). The month experiences relatively moderate precipitation of 53 mm (2.1 in) over about 9 days, alongside a humidity level of 82%. In contrast, March sees colder temperatures, with a minimum of -9°C (17°F) and an average of 7°C (45°F), peaking at 23°C (73°F). Precipitation increases to 74 mm (2.9 in) across 14 days, and the humidity rises slightly to 87%. For more detailed information about March weather, you can visit Mons weather in March.
September generally offers warmer temperatures compared to April, with averages reaching 15°C (60°F) and a maximum of 32°C (91°F), while April's temperatures peak at 26°C (79°F) with an average of only 10°C (50°F). However, April experiences a chillier minimum temperature, dipping down to -3°C (26°F), whereas September stays more moderate with a minimum of 3°C (37°F). In terms of precipitation, September sees slightly more rain at 53 mm (2.1 in) compared to April’s 39 mm (1.5 in), although both months typically have rain on 9 days. Humidity levels are similar, with September at 82% and April slightly higher at 85%. For more details about April's weather in Mons, you can check Mons weather in April.
In comparing the weather between September and May, September tends to have a wider temperature range, with minimums reaching 3°C (37°F) and maximums peaking at 32°C (91°F). In contrast, May showcases slightly lower averages, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 30°C (86°F). Both months experience high humidity levels of around 82%, but September receives slightly less precipitation at 53 mm (2.1 in) spread over 9 days, compared to May's 61 mm (2.4 in) over 13 days. This suggests that while both months can be wet, May may have a greater frequency of rainy days. For a closer look at weather specifics, you can visit Mons weather in May.
In September, temperatures fluctuate more dramatically, with a minimum of 3°C (37°F) and a maximum reaching 32°C (91°F), resulting in an average temperature of 15°C (60°F). In contrast, June starts at a higher minimum of 6°C (43°F) and maintains a similar maximum of 32°C (90°F), with an average temperature of 18°C (64°F). Both months experience high humidity levels of 82% and similar levels of precipitation, with September receiving 53 mm (2.1 in) over 9 days and June slightly higher at 60 mm (2.4 in) across 10 days. For more detailed insights, you can explore this link: Mons weather in June.
In comparing the weather between September and July, there are notable differences in temperature and precipitation. September features a wider temperature range with minimums at 3°C (37°F) and maximums reaching 32°C (91°F), averaging around 15°C (60°F). In contrast, July is warmer, with minimum temperatures of 8°C (46°F) and highs soaring to 39°C (103°F) and an average of 19°C (66°F). Precipitation is slightly higher in July at 65 mm (2.6 in) compared to September's 53 mm (2.1 in), although both months experience rain on about 9 days. Humidity levels are relatively close, with September at 82% and July at 80%. For more detailed information on July weather, check out Mons weather in July.
September weather displays a noticeable shift compared to August, with average temperatures decreasing from 19°C (66°F) in August to 15°C (60°F) in September. The maximum temperatures also drop, reaching 32°C (91°F) in September, down from an intense 37°C (98°F) seen in August. Precipitation in September is slightly lower at 53 mm (2.1 inches) over 9 days, compared to 79 mm (3.1 inches) over 13 days in August. Additionally, September's humidity is higher, averaging 82% compared to 76% in August, contributing to a more damp and cooler atmosphere overall. For a more detailed look at the weather trends, you can refer to Mons weather in August.
September and October present a noticeable transition in weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 32°C (91°F), with an average of 15°C (60°F). Despite being warmer, this month experiences 53 mm (2.1 in) of precipitation over approximately 9 days, while humidity remains relatively high at 82%.
In contrast, October sees cooler temperatures, with a minimum of 1°C (34°F), an average of 12°C (54°F), and a maximum of 25°C (76°F). The month is wetter, registering 78 mm (3.1 in) of rainfall over 14 days, and humidity rises slightly to 89%. This shift marks October as a time of increasing chill and precipitation. For more detailed information, you can visit Mons weather in October.
In September, temperatures range from a chilly minimum of 3°C (37°F) to a warm maximum of 32°C (91°F), with an average of 15°C (60°F). The month typically sees about 53 mm (2.1 in) of precipitation over 9 days and has a relatively high humidity of 82%. In contrast, November experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 7°C (45°F), peaking at 18°C (65°F). This month receives slightly more rainfall, totaling 60 mm (2.4 in) over 11 days, along with even higher humidity at 92%. For more detailed information about November weather, you can visit Mons weather in November.
September and December showcase a significant contrast in weather conditions. In September, temperatures range from a mild 3°C (37°F) at their lowest to a warm maximum of 32°C (91°F), with an average of 15°C (60°F). This month sees relatively lower precipitation, at 53 mm (2.1 in) over about 9 days, combined with a humidity level of 82%. In stark contrast, December experiences much colder temperatures, with a minimum of -4°C (25°F) and a maximum of 15°C (58°F), averaging at 5°C (42°F). The precipitation increases to 100 mm (4.0 in) spread over 17 days, and humidity rises to 92%. For a detailed look at December weather specifics, visit Mons weather in December.
As September rolls in, Mons experiences a captivating transition from the warmth of summer to the cooler embrace of autumn. Temperatures can soar up to 32°C at times, but the average settles around a refreshing 15°C, offering a pleasant respite from the intense summer heat. While the month brings some rainfall, with about 53 mm spread over around 9 days, the humidity remains notably high at 82%, contributing to a lingering warmth in the air. This makes September a month of change, blending the last hints of summer with the crispness of fall. For those interested in more detailed information regarding the weather patterns, visit Mons Climate.