Last updated: August 21, 2025
In September, Leuven, Belgium experiences a diverse climate with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 34°C (93°F), averaging around 16°C (60°F). This transitional month brings a total precipitation of 53 mm (2.1 in) over approximately 10 days, leading to a humidity level of 82%. As autumn sets in, residents and visitors can expect both warm and cooler days, presenting a vibrant tapestry of seasonal change.
In September, Leuven experiences a gentle transition from summer's warmth to autumn's cool embrace. With temperatures ranging from a minimum of 3°C (38°F) to a comfortable average of 16°C (60°F), and peaking at 34°C (93°F), this month showcases remarkable variability. The warmth of late summer lingers, enticing locals and visitors alike to enjoy outdoor activities. As September progresses, the cooler nights remind us that fall is approaching, creating a perfect backdrop for cozy evenings and vibrant autumnal scenery. Overall, the month serves as a beautiful blend of summer's final rays and the crisp beginning of autumn.
September in Leuven sees a notable transition as the summer warmth begins to wane, bringing with it an average precipitation of 53 mm (2.1 in) over 10 days. This amount is a decrease compared to the heavy showers typical of August, which recorded 76 mm (3.0 in). While September's rainfall is moderate, it sets the stage for the wetter autumn months ahead, particularly October, which peaks at 78 mm (3.1 in). The reduced precipitation days this month suggest a mix of sunny intervals and the occasional rain, making it an ideal time for enjoying the changing foliage while still being mindful of the unpredictable showers that can characterize the season.
As summer transitions into autumn, September in Leuven sees a slight rebound in humidity, measured at 82%. This uptick follows a gradual decrease from the peak of 91% in January, with humidity levels steadily declining throughout the warmer months. From a high of 76% in August, September marks a return to more typical autumn conditions, resembling the earlier months of the year. What stands out is the pattern of returning moisture, hinting at the impending shift towards the colder and wetter seasons ahead, as humidity levels are expected to climb again in October and November, reaching 92% by the year's end. This natural ebb and flow in humidity illustrate the climatic rhythm that characterizes Leuven’s year.
As September settles in Leuven, Belgium, the UV Index drops to a moderate level of 5, reflecting a transition from the high summer heat. With this change, the recommended burn time increases to 30 minutes, allowing residents and visitors alike to enjoy outdoor activities with a bit more leeway. After the intense exposure seen in July and August, when the UV Index soared to 8, September brings a welcome dip, encouraging a more relaxed approach to sun safety. While the days are still pleasant, it’s wise to stay vigilant with sun protection as the season shifts. For detailed insights and tips on UV exposure, visit Leuven UV Index.
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September in Leuven, Belgium, welcomes a generous 315 hours of sunshine, wrapping up the vibrant summer months and easing into autumn's embrace. As the sunshine dims gradually from the peak of July's 403 hours, September still offers a substantial amount of light, placing it among the top months of the year. This period elegantly transitions from the lively 392 hours in May and 390 hours in June, highlighting a clear trend of declining sunlight as the days get shorter. The warmth of September is a reminder of the sunny days just passed, creating a perfect backdrop for outdoor activities before the cooler months set in. While sunlight transforms through the ebb and flow of the seasons, September stands out as a beautiful bridge between the brightness of summer and the gentle onset of fall.
In Leuven, Belgium, the likelihood of sunny weather in September stands at a moderate 34%, aligning closely with the summer months of July and August, which hover around the 31-34% range. This trend suggests that while September transitions into autumn, there's still a fair chance of enjoying sunny days. Interestingly, this percentage is slightly higher than the chances seen in October (30%) and significantly better than the dreary winter months, where January dips to a mere 10%. As such, September offers a delightful window to experience early fall charm under sunny skies before the clouds of winter settle in.
As September rolls in, Leuven bids summer farewell, transitioning from the sun-drenched days of July and August to a more temperate daylight experience. This month offers about 12 hours of daylight, marking a noticeable shift from the longer days of summer, yet still enjoying a gentle descent into autumn. The trend in daylight duration showcases a gradual decline as the year progresses, beginning with a mere 8 hours in January that slowly crawls to peaks of 16 hours in June. As fall approaches, daylight diminishes once again, hinting at the cozy vibes of winter ahead. September, with its balanced 12-hour span, beckons for outdoor adventures while the days grow cooler, making it a perfect time to embrace the changing seasons in this charming Belgian city.
As the September wind sweeps through Leuven, Belgium, a noticeable shift occurs, with average wind speeds dropping to a gentle 2.8 m/s (6 mph). This marks the lowest point of the year, contrasting sharply with the more brisk currents experienced in the early summer months. The trend suggests a transition from the warmer, breezier days of July and August, where wind speeds hovered around 3.2 m/s (7 mph). September's calming breezes create a serene atmosphere as autumn begins to settle in, inviting residents and visitors alike to enjoy the city's vibrant parks and charming streets in a more tranquil setting. With the wind now whispering softly through the trees, Leuven embraces the transition into the cozy embrace of fall.
Weather in Leuven varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Leuven, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit distinctively contrasting weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 34°C (93°F) during the day, averaging around 16°C (60°F). This month also sees an average of 53 mm (2.1 in) of precipitation spread over about 10 days, with humidity at 82%. In stark contrast, January experiences much colder temperatures, with a minimum of -7°C (20°F) and a maximum of only 14°C (58°F), averaging just 4°C (40°F). Precipitation increases slightly to 63 mm (2.5 in) over 12 days, coupled with higher humidity at 91%. For more details about the weather in January, you can visit Leuven weather in January.
In September, temperatures range from a chilly 3°C (38°F) at night to a warm 34°C (93°F) during the day, with an average of 16°C (60°F). The month experiences about 53 mm (2.1 in) of precipitation spread over roughly 10 days, accompanied by a humidity level of 82%. In contrast, February is much colder, with temperatures dipping as low as -8°C (17°F) and peaking at a pleasant 19°C (66°F), averaging around 5°C (42°F). This month tends to be wetter, with 69 mm (2.7 in) of precipitation over about 12 days, and a higher humidity of 89%. For a more detailed view of February's weather, check out Leuven weather in February.
In September, the weather tends to be much warmer, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 34°C (93°F) and an average of 16°C (60°F). This month experiences around 53 mm (2.1 in) of precipitation over approximately 10 days, with a humidity level of 82%. In contrast, March is significantly cooler, with temperatures varying from a chilly -8°C (19°F) to a pleasant 23°C (74°F) and an average of 7°C (46°F). Rainfall is slightly higher at 70 mm (2.8 in) spread over 14 days, and the humidity is also slightly elevated at 87%. For more detailed insights, you can check Leuven weather in March.
September and April present distinct weather contrasts. September typically boasts warmer temperatures, with averages around 16°C (60°F) and highs reaching up to 34°C (93°F), while April’s temperatures are cooler, averaging 10°C (51°F) and peaking at 28°C (82°F). In terms of precipitation, September sees a bit more rain, averaging 53 mm (2.1 in) across approximately 10 days, compared to April's 34 mm (1.3 in) over 8 days. Both months experience high humidity, with September at 82% and April slightly higher at 85%. For more details on April weather, you can check Leuven weather in April.
September and May present distinct weather patterns. In September, temperatures range from a chilly 3°C (38°F) at night to a warm 34°C (93°F) during the day, with an average of 16°C (60°F). The month experiences around 53 mm (2.1 in) of precipitation over approximately 10 days. In contrast, May's temperatures start even lower at a minimum of 1°C (34°F), peaking at 32°C (89°F) with an average of 14°C (57°F). Precipitation is slightly higher at 60 mm (2.3 in) over about 12 days. Both months share similar humidity levels at 82%. For a more detailed look at the weather specifics in May, visit Leuven weather in May.
In comparing the weather between September and June, both months experience similar maximum temperatures, reaching up to 34°C (93°F). However, September tends to be cooler on average, with temperatures ranging from a minimum of 3°C (38°F) to an average of 16°C (60°F), compared to June's warmer minimum of 7°C (46°F) and average of 19°C (66°F). Additionally, precipitation is slightly higher in June, with 68 mm (2.7 in) across 10 days, compared to September's 53 mm (2.1 in) over the same number of days. Both months maintain a constant humidity level of 82%, contributing to a muggy feel. For more details, you can check Leuven weather in June.
In comparison to July, September in Leuven showcases a notable shift in weather patterns. July experiences a wider temperature range, with minimums of 8°C (47°F) and maximums reaching as high as 40°C (104°F), resulting in an average temperature of 19°C (67°F). In contrast, September's temperatures are milder, ranging from a minimum of 3°C (38°F) to a maximum of 34°C (93°F), with a lower average of 16°C (60°F). Additionally, July sees greater precipitation at 75 mm (2.9 in) over 10 days, compared to September's 53 mm (2.1 in), also over 10 days, although humidity levels remain fairly similar at 80% in July and 82% in September. For a detailed look at July's climate, you can refer to Leuven weather in July.
In comparing the weather between August and September, September sees a notable drop in minimum temperatures, averaging 3°C cooler at 3°C (38°F) compared to August's minimum of 8°C (46°F). However, September maintains similar maximum temperatures, reaching up to 34°C (93°F), just shy of August's peak of 35°C (96°F). Precipitation levels in September are slightly lower at 53 mm (2.1 in) over 10 days, while August experiences more rainfall with 76 mm (3.0 in) over 14 days. The humidity is higher in September at 82%, compared to August's 76%. For more details on August weather patterns, you can visit Leuven weather in August.
In September, the weather features a broad temperature range, with minimums at 3°C (38°F) and maximums reaching up to 34°C (93°F), averaging around 16°C (60°F). The month experiences moderate precipitation levels of 53 mm (2.1 in) over approximately 10 days, accompanied by relatively high humidity at 82%.
In contrast, October presents cooler conditions, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 26°C (79°F), averaging around 12°C (55°F). Precipitation increases to 78 mm (3.1 in) over 12 days, and humidity rises slightly to 89%. For more detailed weather information, check out Leuven weather in October.
September and November present quite contrasting weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a hot 34°C (93°F) during the day, with an average temperature of 16°C (60°F). The humidity sits at a comfortable 82%, and precipitation is relatively light at 53 mm (2.1 in) over about 10 days. In stark contrast, November brings cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 19°C (66°F), averaging just 7°C (46°F). The humidity climbs slightly to 92%, and rainfall remains similar at 54 mm (2.1 in), spread over 11 days. For more detailed information on November weather, visit Leuven weather in November.
September typically presents a warmer climate, with temperatures ranging from a minimum of 3°C (38°F) to a comfortable average of 16°C (60°F), peaking at a high of 34°C (93°F). In contrast, December experiences much colder conditions, with minimum temperatures dropping to -5°C (23°F) and an average of just 6°C (42°F), reaching a maximum of 15°C (60°F). Additionally, September sees 53 mm (2.1 in) of precipitation over about 10 days, while December is wetter, with 91 mm (3.6 in) of rainfall spread across approximately 16 days. The humidity levels are quite similar in both months, hovering around 82% in September and rising slightly to 92% in December. For more detailed information, check out Leuven weather in December.
As summer transitions to autumn, September in Leuven showcases a remarkable shift in weather dynamics. With daytime temperatures that can soar up to 34°C (93°F), the month retains a hint of summer warmth, yet the average cools significantly, presenting a balance that invites both comfort and rejuvenation. This month also introduces increased humidity at 82% and a fair share of rain, with about 53 mm (2.1 in) over 10 days, creating a refreshing ambiance. In contrast to the scorching highs of July and the mildness of October, September is a transitional month that encapsulates the beauty of change. For more detailed insights into the seasonal characteristics, explore Leuven Climate.