Last updated: August 21, 2025
In Francorchamps, Belgium, September showcases a delightful range of temperatures, with a maximum of 31°C (88°F) inviting late-summer warmth, while the average hovers around 14°C (57°F), and chilly nights occasionally dip to a minimum of 2°C (35°F). This month also experiences 78 mm (3.1 in) of rain across 11 days, contributing to a notable humidity level of 81%. As autumn approaches, visitors can expect a blend of pleasant sunny days and refreshing showers, perfect for enjoying the scenic beauty of this iconic region.
In September, Francorchamps transitions smoothly from summer's warmth to autumn's embrace, showcasing a notable shift in temperatures. The month opens with average lows around 2°C (35°F) and peaks at a comfortable 31°C (88°F), providing a delightful range of 14°C (57°F). This variation highlights the tail end of warm days, inviting visitors to relish mild afternoons while gradually preparing for the coolness ahead. It's a time when the vibrant colors of nature begin to emerge, making September a picturesque month for exploring the scenic beauty of Belgium. As the landscape transforms, so do the temperatures, indicating that winter is on the horizon, but for now, the warmth remains inviting.
In September, Francorchamps experiences a noticeable shift in precipitation patterns, with a total of 78 mm (3.1 in) of rain falling over 11 days. This marks a decrease from the wetter summer months, as August saw 91 mm (3.6 in) of rainfall across 17 days. The transition heralds the arrival of autumn, bringing with it a refreshing reduction in both rainfall and rainy days compared to the more tumultuous summer. As the month unfolds, the diminishing precipitation signals a gradual shift towards the cooler months ahead, providing a brief respite from the heavier downpours typical of the earlier season.
In September, humidity in Francorchamps, Belgium rises to a notable 81%, marking a shift from the drier summer months of July and August, which experience their lowest levels at 72% and 71%, respectively. This increase signals the transition into autumn, as the atmosphere begins to retain more moisture. Interestingly, the humidity levels in September are noticeably higher than the late summer months, aligning more closely with the beginning of fall, where levels steadily climb again towards the winter averages of 91% in November and 92% in December. Overall, the trend highlights a journey from the comparatively dry summer, through a humid September, and into the wetter months ahead, defining the region's distinct seasonal rhythm.
In September, Francorchamps experiences a UV Index of 6, which falls into the high exposure category with a burn time of just 25 minutes. This marks a gradual decline from the summer's peak, where July and June reached UV Index values of 8 and 9, respectively. The transition from the intense summer sun, where caution was essential due to very high exposure levels, provides a welcome respite. Yet, September still requires awareness, especially for those spending extended time outdoors. As the months progress toward October, the UV Index is expected to decrease further, entering the moderate zone. For more detailed insights about daily UV levels in this region, visit Francorchamps UV Index.
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As summer gently transitions to autumn, September in Francorchamps offers a delightful balance of warmth and daylight, with an impressive 319 hours of sunshine. This month marks a notable dip from the height of summer, where June and July bask in over 400 hours of radiant sun, yet it remains significantly brighter than the winter months. The gradual decline in sunshine hours begins in August, hinting at the impending chill, but September's ample daylight still invites outdoor adventures and picturesque drives through the Ardennes. As the year progresses, one can appreciate how the vibrant summer fades into the more subdued autumn, with sunshine hours steadily decreasing, yet September holds a charming allure that bridges the two seasons beautifully.
September in Francorchamps, Belgium, experiences a notable increase in the chance of sunny weather, with a 37% likelihood of sunshine gracing the area. This trend follows the late summer months where sunny opportunities peak during July and August. Interestingly, September’s chance of sun is higher than both May and June, suggesting that the transition into autumn can still offer some pleasant weather. As the days begin to shorten and the crispness of fall starts to settle in, September remains an inviting month for outdoor activities, just before the autumnal chill takes over.
As September unfolds in Francorchamps, Belgium, daylight begins to wane, offering approximately 12 hours of light—a gentle transition from the vibrant 16 hours enjoyed in June. Following the height of summer, September marks a gradual descent toward autumn, with daylight gradually decreasing since reaching peak brightness in May and June. This month signals a blend of late summer warmth and the crisp anticipation of fall, as daily sunlight slowly retreats. The trend toward shorter days continues into October, when daylight will further reduce to 10 hours, reinforcing the seasonal rhythms and setting the stage for the cozy ambiance of autumn nights.
In September, the winds in Francorchamps, Belgium typically calm down, averaging just 2.8 m/s (6 mph), a notable drop from the bluster of early summer. This gentle breeze sets the stage for a tranquil transition into autumn, contrasting sharply with the more vigorous gusts seen in earlier months like January and October, where winds reach closer to 4.5 m/s and 4.6 m/s respectively. The overall trend reveals a gradual decline in wind speed as summer fades, peaking in the spring with fluctuating breezes around 4.6 m/s in May, before settling into the more serene climate of September. This calming influence of the early autumn winds makes for a pleasant atmosphere, perfect for enjoying the breathtaking scenery of the region.
Weather in Francorchamps varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Francorchamps, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a cool 2°C (35°F) to a warm 31°C (88°F), with an average of 14°C (57°F). The month sees around 78 mm (3.1 in) of precipitation over 11 days, accompanied by a humidity level of 81%. In contrast, January experiences much colder temperatures, with a minimum of -13°C (9°F), an average of 1°C (35°F), and a maximum of 12°C (53°F). Precipitation increases to 101 mm (4.0 in) spread across 15 days, and humidity rises slightly to 91%. For a closer look at January's conditions, check out Francorchamps weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a mild 2°C (35°F) at night to a warm average of 14°C (57°F) and peak at 31°C (88°F) during the day, creating a pleasant environment for outdoor activities. The month sees around 78 mm (3.1 in) of rainfall over 11 days, with humidity levels at 81%. In contrast, February brings much colder temperatures, with minimums dropping to -12°C (11°F) and an average of only 3°C (38°F), reaching a maximum of 19°C (67°F) on rare occasions. Precipitation increases slightly to 92 mm (3.6 in) over 13 days, accompanied by a higher humidity of 90%. For more details on February weather in Francorchamps, you can visit Francorchamps weather in February.
September and March present quite different weather patterns, highlighting the transition between summer and spring. In September, temperatures range from a mild 2°C (35°F) at night to a warm 31°C (88°F) during the day, with an average of 14°C (57°F). The month experiences about 78 mm (3.1 in) of precipitation over 11 days and an average humidity of 81%. In contrast, March is significantly cooler, with temperatures dipping as low as -14°C (8°F) at night and peaking at 21°C (71°F), averaging around 5°C (42°F). It also sees more rainfall, totaling 110 mm (4.3 in) over 17 days and higher humidity at 87%. For a detailed look at March weather, you can explore Francorchamps weather in March.
When comparing the weather in September and April, several notable differences emerge. September typically boasts a warmer climate with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 31°C (88°F). In contrast, April's temperatures start lower, with a minimum of -6°C (22°F) and a maximum of 25°C (78°F), making it feel much cooler overall. While both months experience approximately 11 days of precipitation, September sees a higher total accumulation of 78 mm (3.1 in) compared to April's 49 mm (1.9 in). Humidity levels are quite similar, with September at 81% and April slightly higher at 84%. For a more detailed look, you can check out Francorchamps weather in April.
September and May showcase distinct weather patterns, each with its unique characteristics. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 31°C (88°F), with an average of 14°C (57°F). The month sees about 78 mm (3.1 in) of precipitation spread over 11 days, and humidity levels are relatively high at 81%. In contrast, May presents cooler temperatures with a minimum of -1°C (30°F), an average of 12°C (54°F), and a maximum of 29°C (85°F). It experiences slightly more precipitation at 91 mm (3.6 in) over 15 days, with humidity hovering around 77%. For more detailed insights, visit Francorchamps weather in May.
In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 31°C (88°F), averaging 14°C (57°F) throughout the month. The weather is characteristically humid, with an average humidity level of 81% and rainfall totaling 78 mm (3.1 in) over approximately 11 days. In contrast, June experiences slightly milder temperatures, with a minimum of 6°C (42°F) and a maximum of 32°C (89°F), averaging 17°C (62°F). Although June receives more precipitation—102 mm (4.0 in) distributed across 14 days—the humidity level is notably lower at 74%. For more detailed insights into June weather, visit Francorchamps weather in June. Overall, September tends to be more variable with cooler nights and higher humidity, while June is a bit warmer and wetter.
In comparing the weather between September and July, it’s clear that September experiences a wider range of temperatures, with a minimum of 2°C (35°F) and a maximum of 31°C (88°F), averaging at 14°C (57°F). In contrast, July is generally warmer, featuring temperatures that range from a minimum of 6°C (44°F) to a maximum of 37°C (99°F), with an average of 17°C (63°F). Additionally, July sees more rainfall, accumulating 103 mm (4.1 in) over 14 days, while September has a total of 78 mm (3.1 in) across 11 days. Humidity levels are also higher in September at 81%, compared to July's 72%. For more details on July weather, check out Francorchamps weather in July.
In comparing the weather of September to that of August, we see a noticeable shift in temperatures and precipitation patterns. September experiences a broader temperature range, with minimums dipping to 2°C (35°F) and maximums reaching 31°C (88°F), while August has a milder minimum of 5°C (41°F) and a slightly warmer maximum of 33°C (92°F). Precipitation is also more frequent in August, with 91 mm (3.6 in) over 17 days compared to September's 78 mm (3.1 in) over just 11 days. Additionally, humidity levels rise in September to 81%, compared to August’s more comfortable 71%. For a closer look at August weather specifics, visit Francorchamps weather in August.
September and October both experience significant shifts in weather patterns. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 31°C (88°F), with an average temperature of 14°C (57°F). The month gets about 78 mm (3.1 in) of precipitation over 11 days, and humidity is relatively high at 81%. In contrast, October sees a drop in average temperatures to 10°C (51°F), with a minimum of 0°C (32°F) and a maximum of 23°C (74°F). Precipitation increases slightly to 94 mm (3.7 in) over 15 days, and humidity rises to 88%. This transition marks a notable change as the warmth of early autumn gives way to cooler and wetter conditions. For more details, you can check Francorchamps weather in October.
In September, the weather typically begins to transition from summer warmth, with minimum temperatures around 2°C (35°F) and an average high of 31°C (88°F). This month sees an average temperature of 14°C (57°F) and experiences 11 days of precipitation totaling 78 mm (3.1 inches), alongside a relatively high humidity level of 81%.
In contrast, November brings much cooler conditions, with minimum temperatures dropping to -5°C (24°F) and an average high of only 17°C (63°F). The average temperature for the month is about 5°C (42°F), and while it has slightly less precipitation at 71 mm (2.8 inches), it spans 13 days. Additionally, November has a higher humidity level of 91%. For more detailed information about the weather in this month, you can refer to Francorchamps weather in November.
In September, the weather is notably warmer, with average temperatures reaching around 14°C (57°F), peaking at 31°C (88°F) on warm days. However, it's also quite humid, with an average humidity of 81% and a total of 78 mm (3.1 in) of precipitation spread across 11 days. In contrast, December brings much colder conditions, with average temperatures dropping to 3°C (38°F) and highs only reaching 13°C (56°F). This month is also characterized by more precipitation, totaling 137 mm (5.4 in) over 21 days, and a higher humidity level of 92%. For a detailed overview of the December climate, check out Francorchamps weather in December.
As summer transitions into autumn, September in Francorchamps offers a unique blend of weather characteristics that set it apart from other months. Warm days can still reach an inviting 31°C (88°F), creating a pleasant atmosphere for outdoor activities, yet the nights cool significantly, dipping to a brisk 2°C (35°F). This month is notably marked by heightened humidity levels at 81%, contributing to a distinct feel in the air. Rainfall is also prominent, with 78 mm (3.1 in) of precipitation spread over 11 days, making it essential to be prepared for both sunshine and showers. Such variability enriches the experience of September, crafting a dynamic microclimate that reflects the changing season. For a deeper understanding of what to expect throughout the year, explore the Francorchamps Climate page.