Last updated: August 21, 2025
Saint-Gilles, Belgium experiences a dynamic September with temperatures ranging from a crisp 4°C (39°F) during the night to a balmy 33°C (91°F) at peak daytime. On average, the month holds a moderate temperature of around 15°C (60°F), catering to those who enjoy the gentle shift from summer to fall. Despite promising warmth, 55 mm (2.2 in) of rainfall occurs over 9 days, contributing to a notably high humidity of 82%. This combination creates a unique atmospheric feel, making September an intriguing time to explore Saint-Gilles.
In September, Saint-Gilles, Belgium, experiences a pleasant transition as summer gradually gives way to autumn. With minimum temperatures averaging around 4°C (39°F) and maximums reaching up to a warm 33°C (91°F), the month offers a delightful mix of warm days and cooler evenings. The average temperature hovers at a comfortable 15°C (60°F), making it an ideal time for outdoor activities and exploring the vibrant parks and streets. As the month progresses, you'll notice a slight drop in temperatures compared to the sweltering highs of summer, setting a perfect backdrop for the rich colors of autumn to emerge. Overall, September in Saint-Gilles strikes a charming balance, inviting both locals and visitors to relish the last warmth of the season before winter's chill sets in.
In September, Saint-Gilles experiences a gentle shift in its weather patterns, with precipitation totaling 55 mm (2.2 in) over just 9 days. This marks a decrease from the wetter months of July and August, where rainfall peaked at 71 mm (2.8 in) and 80 mm (3.2 in) respectively. The transition to September brings a noticeable reduction in both precipitation amount and frequency, hinting at the tail end of summer's showers. As the leaves begin to turn, this dip in precipitation sets the stage for a cozy fall atmosphere, transitioning smoothly into the more drizzly October, where the average rainfall climbs to 76 mm (3.0 in). Despite the overall decrease, September's moderate rain still serves to nourish the lush landscapes that characterize this vibrant Belgian town.
In Saint-Gilles, Belgium, September sees a moderate humidity level of 82%, reflecting a transition from the warmer summer months. Throughout the year, humidity tends to peak during the winter months, with January and February reaching notably high levels of 91% and 89%, respectively. As the seasons change, there's a gradual decrease in humidity into the summer, hitting its lowest point in August at 76%. However, as autumn sets in, the humidity begins to creep back up, indicating a shift towards the wetter conditions typically associated with fall. This trend illustrates the region's characteristic climate, where humidity rises and falls with the changing seasons, ultimately enhancing the lush ambiance of this charming Belgian locale.
As September unfolds in Saint-Gilles, Belgium, the UV Index recedes to a moderate level of 5, signaling a shift from the intense rays of summer. After the peaks of July and June, where readings soared to 8—classified as very high—the sun's intensity becomes more forgiving, allowing for a burn time of 30 minutes. This trend highlights a gradual transition toward the cooler months, offering a welcome balance for outdoor enthusiasts. Despite the decrease in UV exposure, it remains essential to stay mindful of sun protection, especially as days grow shorter. For further details on UV levels and their implications, explore the Saint-Gilles UV Index.
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As summer gracefully transitions into autumn, September in Saint-Gilles, Belgium continues to bask in a generous 319 hours of sunshine. While this marks a slight dip from the sun-drenched heights of July’s 406 hours, it still offers a vibrant farewell to the warm months. The gradual decline in sunlight is evident, mirroring the trends of previous months, where sunny days peaked in summer and begin to recede as cooler weather approaches. Nevertheless, September shines brighter than the earlier months of the year, surpassing the totals seen in January and February, and forging a picturesque backdrop for autumn strolls and outdoor gatherings. This blend of lingering warmth and encroaching fall sets the stage for a stunning seasonal transition in this charming Belgian locale.
In Saint-Gilles, Belgium, the likelihood of sunny weather in September sits at 36%, marking a slight uptick compared to the preceding summer months, which hover around the 29%-34% range. As the seasons shift from the warmth of summer to the early whispers of autumn, September provides a pleasant opportunity for brighter days. While it remains less sunny than the peak months of April and March—where chances shoot up to 50% and 40% respectively—the gradual decline in sunshine from the vibrant summer months reflects the seasonal transition. For those planning outdoor activities, September offers a balanced blend of lingering summer warmth and the crisp beginnings of fall, making it an appealing time to soak up the sun before winter approaches.
As September unfolds in Saint-Gilles, Belgium, daylight begins to gently wane, offering around 12 hours of sunshine— a notable transition from the vibrant 15 hours experienced in May and the peak of 16 hours in June. Following the warmth of summer, the daylight hours steadily decrease, reflecting the rhythm of the changing seasons. Unlike the winter months of January and December, which see only 8 hours of daylight, September still provides a generous amount of light, bridging the transition into autumn. This serves as a reminder of nature's cycles, where each month ushers in its own unique atmosphere, with September gracefully balancing the light of summer and the encroaching stillness of fall.
In September, the winds in Saint-Gilles, Belgium gently ease into a more tranquil rhythm, averaging 3.0 m/s (7 mph). This marks a subtle dip from the summer breezes, which generally hover around 3.4 m/s to 4.4 m/s (8 to 10 mph) throughout the warmer months. As the days grow shorter and autumn approaches, this decrease suggests a transition toward a more serene climate, inviting residents and visitors alike to enjoy the crisp air and vibrant scenery. Interestingly, September's winds are among the lightest of the year, a stark contrast to the more blustery conditions expected in October, where the wind speeds rebound to an average of 4.3 m/s (10 mph). Embracing this shift, September becomes a gentle prelude to the more dynamic autumn winds that follow.
Weather in Saint-Gilles varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Gilles, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January offer starkly contrasting weather patterns. In September, temperatures can range from a brisk 4°C (39°F) to a warm 33°C (91°F), with an average of 15°C (60°F) and relatively lower humidity at 82%. This month sees around 55 mm (2.2 in) of rainfall over approximately 9 days. In contrast, January experiences much colder conditions, with temperatures dropping as low as -7°C (20°F) and peaking at a modest 14°C (57°F), averaging only 4°C (39°F). Rainfall increases slightly to 65 mm (2.5 in) over 12 days, accompanied by higher humidity levels of 91%. For more detailed information, you can check Saint-Gilles weather in January.
September and February display contrasting weather patterns. In September, temperatures range from a mild 4°C (39°F) at night to a warm maximum of 33°C (91°F) during the day, with an average of 15°C (60°F). The month typically sees about 55 mm (2.2 in) of precipitation over approximately 9 days, accompanied by a humidity level of 82%. Conversely, February experiences much colder conditions, with minimum temperatures dropping to -8°C (17°F) and an average of only 5°C (42°F), peaking at 19°C (66°F). Precipitation increases slightly to 69 mm (2.7 in) over 12 days, and humidity rises to 89%. For more insights into February weather, you can visit Saint-Gilles weather in February.
September and March offer distinct weather experiences. In September, temperatures range from a mild 4°C (39°F) at night to a warm 33°C (91°F) during the day, with an average of 15°C (60°F). The month sees about 55 mm (2.2 in) of precipitation across 9 days, making it relatively drier than March. In contrast, March is significantly cooler, with temperatures dipping to a minimum of -8°C (17°F) and peaking at 23°C (74°F) for an average of 7°C (45°F). This month is wetter, experiencing 70 mm (2.8 in) of rain over 14 days, accompanied by higher humidity at 87%. For a more detailed look at the weather conditions specific to March, you can check Saint-Gilles weather in March.
In September, temperatures range significantly, with a minimum of 4°C (39°F) and a maximum of 33°C (91°F), averaging around 15°C (60°F). The month experiences higher precipitation at 55 mm (2.2 in) over 9 days, accompanied by a humidity level of 82%. In contrast, April has cooler overall temperatures, starting from a minimum of -4°C (26°F) and peaking at 27°C (80°F), with an average of 10°C (50°F). This month sees less rainfall, accumulating 37 mm (1.5 in) over 8 days, and slightly higher humidity at 85%. For more details about the weather in April, visit Saint-Gilles weather in April.
In comparing the weather of September and May, both months exhibit a similar level of humidity at 82%, contributing to a generally moist atmosphere. September tends to be warmer overall, with average temperatures reaching 15°C (60°F) and maximums soaring up to 33°C (91°F), compared to May's average of 13°C (57°F) and a maximum of 31°C (88°F). Precipitation levels are quite similar, with September receiving 55 mm (2.2 in) over 9 days and May seeing 58 mm (2.3 in) across 12 days. For a more detailed look at May's climate, check out Saint-Gilles weather in May.
In September, temperatures vary more dramatically, with a minimum of 4°C (39°F) and a maximum reaching up to 33°C (91°F), resulting in an average temperature of 15°C (60°F). This month sees a total precipitation of 55 mm (2.2 inches) over approximately 9 days, maintaining a humidity level of 82%. Conversely, June offers milder conditions with a minimum of 7°C (44°F) and an average temperature of 18°C (65°F), peaking at 32°C (91°F). The precipitation during June is slightly higher at 66 mm (2.6 inches) across the same number of rainy days, but the humidity remains constant at 82%. For more details on June weather, visit Saint-Gilles weather in June.
When comparing the weather in September to July, September tends to exhibit a wider temperature range, with minimum temperatures dropping to 4°C (39°F) and maximums reaching up to 33°C (91°F). In contrast, July's temperatures are generally warmer, with a minimum of 8°C (46°F) and maximums soaring to 39°C (102°F). Additionally, September experiences slightly less precipitation at 55 mm (2.2 inches) over 9 days, compared to July's 71 mm (2.8 inches) over 11 days. Humidity remains relatively high in both months, with September seeing a modest increase at 82% compared to July's 80%. For a detailed look at July's weather, you can explore Saint-Gilles weather in July.
In comparing the weather of September to that of August, a notable shift can be observed. September experiences a minimum temperature of 4°C (39°F) and an average of 15°C (60°F), significantly cooler than August's warmer minimum of 8°C (46°F) and average of 19°C (66°F). Max temperatures also drop from August's peak of 36°C (97°F) to a more moderate 33°C (91°F) in September. Additionally, September sees increased precipitation, receiving 55 mm (2.2 in) over 9 days, while August averages 80 mm (3.2 in) in 14 days, indicating a wetter month despite a lower total rainfall. Humidity remains relatively high in both months, with September at 82% compared to August's 76%. For a detailed look at August weather, check out Saint-Gilles weather in August.
September offers a warm farewell to summer, with temperatures ranging from a cool 4°C (39°F) at night to a high of 33°C (91°F) during the day, accompanied by an average of 15°C (60°F). The month experiences moderate rainfall of 55 mm (2.2 in) spread over 9 days, coupled with a relative humidity of 82%, making for a pleasantly warm yet slightly humid atmosphere.
In contrast, October ushers in a noticeable chill, with temperatures dropping to a minimum of 1°C (34°F) and peaking at 25°C (77°F), averaging around 12°C (54°F). The rainfall increases to 76 mm (3.0 in) over 13 days, and humidity rises to 89%, resulting in a distinctly wetter and cooler feel. For more detailed information about the weather this month, visit Saint-Gilles weather in October.
In comparing the weather between September and November, there's a noticeable shift in temperature and humidity. September boasts a comfortable average temperature of 15°C (60°F), with highs soaring to 33°C (91°F), while November sees a drop to an average of 7°C (45°F) and a maximum of 18°C (65°F). While both months experience similar levels of precipitation—around 55-57 mm (2.2 inches)—November is slightly wetter, with rain on 11 days compared to September's 9 days. Additionally, November's humidity is higher at 92%, compared to September's 82%, reflecting the cooler and damper climate of late fall. For those interested in a detailed forecast, more information can be found at Saint-Gilles weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a mild minimum of 4°C (39°F) to a warm maximum of 33°C (91°F), with an average temperature of 15°C (60°F). The month sees moderate precipitation of 55 mm (2.2 in) over about 9 days, with humidity levels at 82%. In stark contrast, December brings much colder conditions, with temperatures ranging from a chilly minimum of -5°C (24°F) to a maximum of 15°C (59°F) and an average of just 5°C (42°F). Additionally, December experiences higher precipitation levels, totaling 93 mm (3.7 in) across approximately 17 days, and humidity rises slightly to 92%. For a more detailed look at the climate during this time, you can visit Saint-Gilles weather in December.
As summer gradually hands over the reins to autumn, September in Saint-Gilles presents a unique mix of weather experiences. The temperature range can swing from a comfortable 15°C to the occasional high of 33°C, creating days that still feel summery alongside cooler nights. Unlike the balmy heat of July and August, the arrival of September ushers in an increase in humidity, reaching around 82%, making the air feel heavier. Additionally, this month sees more precipitation, with an average of 9 rainy days, suggesting a shift towards the wetter aspects of fall. For those looking to enjoy a blend of summer warmth and the crispness of early autumn, September serves as a transitional bridge. Curious about the full picture? Explore more at Saint-Gilles Climate.