Last updated: August 21, 2025
In September, Sainte-Marie-sur-Semois experiences a delightful blend of autumn's early charm, with maximum temperatures reaching up to 33°C (91°F) and a soothing average of 14°C (58°F). The cooler nights can dip to a brisk 3°C (38°F), prompting cozy evenings. However, the month brings its share of rain, totaling 73 mm (2.9 in) over approximately 10 days, contributing to a notable humidity level of 83%. This mix creates a vibrant landscape, perfect for both outdoor activities and enjoying the serene beauty of the Belgian countryside.
In Sainte-Marie-sur-Semois, September marks a significant transition as summer warmth begins to wane. With minimum temperatures hovering around 3°C (38°F) and averages reaching 14°C (58°F), the month is a pleasant blend of cool, crisp air and lingering warmth. Daily highs can soar to a striking 33°C (91°F), showcasing a final summer flourish. As autumn approaches, the gradual decrease in temperature sets the stage for the vibrant fall foliage, making September an ideal time to experience the stunning natural beauty of this Belgian gem. This month stands out in the year’s temperature profile, bridging the hot summer and the cooler autumn months in a colorful array of seasonal shifts.
In September, Sainte-Marie-sur-Semois experiences a moderate precipitation total of 73 mm (2.9 in) over 10 days, reflecting a slight decrease from the heavier summer months. This amount mirrors the trend observed in August, suggesting a consistent late summer rainfall pattern. As autumn approaches, precipitation begins its upward trajectory, with October typically bringing a notable increase to 95 mm (3.8 in). The relatively lower rainfall and fewer wet days in September hint at a transitional period, where the region starts to shift from the warm summer climate toward the cooler, wetter months ahead. Overall, this month serves as a serene bridge between the vibrancy of summer and the impending chill of fall.
In September, Sainte-Marie-sur-Semois experiences a notable humidity level of 83%, which slightly rises from the preceding months and sets the stage for the transition into autumn. As the summer warmth gives way, humidity begins to fluctuate, reflecting the cooling temperatures that follow. The trend showcases a gradual decrease from the high humidity typical of the winter months, peaking at 93% in December. Overall, September marks a midpoint where humidity remains relatively mild compared to the peak months, hinting at the approaching chill of fall while still retaining a touch of summer’s warmth.
As summer fades into autumn, September in Sainte-Marie-sur-Semois sees a noticeable shift in the UV Index. With a value of 6, the exposure category is classified as high, allowing for a burn time of just 25 minutes. This trend marks a decline from the very high indices of the preceding months, yet it remains essential for residents and visitors alike to take precautions. With sunlight still strong, it’s a perfect time to enjoy the beautiful scenery while staying protected. As the landscape transitions, understanding the Sainte-Marie-sur-Semois UV Index will help ensure a safe outdoor experience throughout September.
UV Risk Categories
September in Sainte-Marie-sur-Semois offers a delightful balance of sunshine, with 317 hours of radiant daylight gracing the month. This marks a subtle decline from the peak of 411 hours seen in June, yet it remains a significant amount compared to the colder months ahead. As summer wanes, the sun casts a warm glow over the lush landscapes, inviting visitors to relish in the changing colors of autumn. The gradual decrease in daylight hours from August’s 385 hours suggests a transitional phase, where the lingering warmth invites both relaxation and adventure before the chill of October sets in. Embrace September's charm, as this month strikes a harmonious balance between summer's brightness and the quiet onset of fall.
In Sainte-Marie-sur-Semois, the likelihood of sunny weather in September stands at a moderate 39%, making it a month where the chances for delightful, sun-soaked days are on the rise compared to summer months. This figure reflects a notable increase from the 27% chance in August, suggesting that as the season transitions, the area enjoys a pleasant mix of sun and early autumn beauty. While it doesn't match the peak of 50% in April, the September sun still offers ample opportunity for outdoor activities amid the stunning fall foliage, making it a splendid time to explore the natural charm of this picturesque Belgian locale.
As summer's warmth begins to wane, September in Sainte-Marie-sur-Semois brings a gentle transition, with daylight lasting approximately 12 hours. This marks a noticeable shift from the sun-drenched days of June, which offer the longest daylight at 16 hours, and gradually leads into the more muted light of autumn. The pattern of daylight duration follows a rhythmic cycle throughout the year: a slow increase from the winter months, peaking in the vibrant days of late spring and summer, before descending back into the shorter days of winter. In September, you can still relish the lingering daylight, a perfect balance that hints at the golden hues of fall while allowing time to savor the last vestiges of summer.
In Sainte-Marie-sur-Semois, September brings a gentle breeze, with an average wind speed of only 2.8 m/s (6 mph), making it one of the calmest months of the year. Following a summer where winds reached a moderate steady pace, the transition into autumn is marked by a noticeable decrease in activity. This tranquil climate invites serene afternoons and leisurely strolls, as the region shifts from the vibrant energy of summer to a more reflective and gentler atmosphere. Interestingly, September's winds echo a broader trend, as the months preceding it feature variable speeds, hinting at the dynamic nature of seasonal shifts in this picturesque Belgian locale.
Weather in Sainte-Marie-sur-Semois varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sainte-Marie-sur-Semois, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions in terms of temperature and precipitation. In September, temperatures can range from a mild 3°C (38°F) at night to a warm peak of 33°C (91°F) during the day, with an average of 14°C (58°F). The month experiences about 73 mm (2.9 in) of precipitation over approximately 10 days, accompanied by a relatively high humidity of 83%. In stark contrast, January brings much colder temperatures, with lows plummeting to -11°C (12°F) and daytime highs only reaching 11°C (53°F), resulting in a much lower average of 2°C (35°F). The winter month sees slightly more rainfall at 92 mm (3.6 in) over 13 days and a humidity level of 91%. For more detailed information, you can check Sainte-Marie-sur-Semois weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a mild 3°C (38°F) at night to a warm 33°C (91°F) during the day, with an average temperature of 14°C (58°F). The month experiences about 73 mm (2.9 in) of precipitation over roughly 10 days and maintains a relatively high humidity of 83%. In stark comparison, February features much colder temperatures, with lows plunging to -10°C (13°F) and daytime highs of 19°C (66°F), averaging just 3°C (38°F). This month sees slightly higher precipitation at 91 mm (3.6 in) across about 13 days, coupled with an even higher humidity of 90%. For those interested in a deeper dive into February's climate specifics, you can check out Sainte-Marie-sur-Semois weather in February.
Comparing the weather between September and March reveals distinct seasonal differences. In September, temperatures are generally warmer, with a minimum of 3°C (38°F), an average of 14°C (58°F), and a maximum reaching up to 33°C (91°F). Conversely, March experiences colder conditions, characterized by a minimum of -12°C (10°F) and an average of 6°C (42°F), peaking at 21°C (71°F). Additionally, March tends to be wetter, with 103 mm (4.1 in) of precipitation over about 15 days, compared to September's 73 mm (2.9 in) and 10 rainy days. Humidity is also slightly higher in March at 88%, compared to September's 83%. For more detailed information, you can explore Sainte-Marie-sur-Semois weather in March.
When comparing the weather in September and April, several key differences emerge. September boasts warmer temperatures, with a minimum of 3°C (38°F) and an average of 14°C (58°F), peaking at a high of 33°C (91°F). In contrast, April tends to be cooler, starting at a minimum of -3°C (27°F) and averaging 9°C (48°F), with a maximum of 26°C (79°F). Additionally, September experiences more precipitation, totaling 73 mm (2.9 in) over approximately 10 days, while April sees less rainfall at 47 mm (1.8 in) across 11 days. Despite these differences, both months have similar humidity levels, hovering around 83% in September and 84% in April. For more insights on the weather patterns during this month, you can visit Sainte-Marie-sur-Semois weather in April.
In comparing the weather of September and May, we see some fascinating differences. September boasts a wider temperature range with a minimum of 3°C (38°F) and a maximum of 33°C (91°F), presenting warmer days on average than May, which has a minimum of -1°C (31°F) and a maximum of 30°C (86°F). Both months experience notable rainfall, with September receiving 73 mm (2.9 in) over 10 days while May has slightly more precipitation at 82 mm (3.2 in) across 14 days. Humidity is also quite similar, at 83% in September and 81% in May. For those interested in the specifics of May's weather, you can refer to Sainte-Marie-sur-Semois weather in May.
When comparing the weather in September and June, both months exhibit mild temperatures, but September tends to experience slightly warmer extremes. September has a minimum temperature of 3°C (38°F) and an average of 14°C (58°F), peaking at 33°C (91°F). In contrast, June starts off a bit warmer with a minimum of 5°C (42°F), averaging 17°C (63°F), and reaching a maximum of 32°C (90°F). Precipitation levels are quite similar, with September receiving 73 mm (2.9 in) over about 10 days and June having 84 mm (3.3 in) over 13 days. Interestingly, both months have comparable humidity levels, with September at 83% and June slightly lower at 82%. For more detailed insights, check out Sainte-Marie-sur-Semois weather in June.
In comparing the weather of September and July in Sainte-Marie-sur-Semois, we see notable differences in temperature and humidity. September experiences a wider range of temperatures, with a minimum of 3°C (38°F) and a maximum reaching up to 33°C (91°F), while July starts at a warmer minimum of 7°C (45°F) and peaks at 37°C (99°F), indicating hotter conditions. The average temperatures also reflect this trend, with September averaging 14°C (58°F) compared to July's 18°C (65°F). Interestingly, both months receive similar precipitation levels—73 mm (2.9 in)—but September experiences slightly fewer rainy days with precipitation occurring on 10 days compared to 11 days in July. Humidity levels are comparable, with September at 83% and July at 82%. For a more detailed look at July weather, you can check out Sainte-Marie-sur-Semois weather in July.
In comparing the weather between August and September, September experiences slightly cooler temperatures, with a minimum of 3°C compared to August's 5°C, and an average temperature of 14°C versus August's 18°C. While September boasts a maximum temperature of 33°C, it's still lower than August's peak of 35°C. Precipitation is quite similar between the two months, with September receiving 73 mm over 10 days and August receiving 71 mm over 15 days, although September is slightly wetter in terms of total rainfall. Humidity levels remain relatively high in both months, with September at 83% and August at 80%. For a detailed breakdown of August weather, you can check Sainte-Marie-sur-Semois weather in August.
In comparing the weather of September and October, a notable shift occurs as temperatures begin to cool. September boasts a wider temperature range with minimums of 3°C (38°F) and maximums reaching 33°C (91°F), while October's temperatures drop to a low of 1°C (33°F) and a maximum of 24°C (75°F). Additionally, October sees a higher average precipitation of 95 mm (3.8 in) over 13 rainy days compared to September's 73 mm (2.9 in) across 10 days, contributing to an increase in humidity from 83% in September to 89% in October. For more specific insights, you can check Sainte-Marie-sur-Semois weather in October.
September weather is characterized by warmer temperatures, with minimums around 3°C (38°F) and maximums peaking at 33°C (91°F), leading to an average of 14°C (58°F). In contrast, November experiences colder conditions, with minimum temperatures dropping to -4°C (26°F) and an average temperature of only 5°C (42°F). Both months see a fair amount of precipitation, with September receiving 73 mm (2.9 in) over approximately 10 days, while November has slightly more rainfall at 79 mm (3.1 in) but over 13 days. Moreover, November's humidity is higher at 91%, compared to September's 83%. For a closer look at the specifics of November weather, check out Sainte-Marie-sur-Semois weather in November.
September and December exhibit striking differences in weather patterns. In September, temperatures can range from a mild 3°C (38°F) at night to a warm 33°C (91°F) during the day, with an average of 14°C (58°F). The month experiences moderate rainfall of 73 mm (2.9 in) over about 10 days, and humidity levels sit at a comfortable 83%. In contrast, December brings colder conditions, with temperatures dropping to a minimum of -5°C (23°F) and a maximum of only 14°C (57°F), averaging just 3°C (38°F). This month sees significantly higher precipitation of 149 mm (5.9 in) spread over 20 days and increased humidity at 93%. For more detailed information, you can check Sainte-Marie-sur-Semois weather in December.
As summer fades, September in Sainte-Marie-sur-Semois welcomes a refreshing transition, showcasing more moderate temperatures compared to the sweltering highs of July and August. The cool mornings and balmy afternoons create a delightful mix, encouraging outdoor exploration amidst the stunning autumn foliage. With around 73 mm of precipitation spread over 10 days, this month brings a gentle reminder of the upcoming fall, contrasted with the heavier rainfall often seen later in the year. September's elevated humidity levels add a unique element to the atmosphere, enhancing the richness of the landscape. For a deeper insight into how these weather patterns shape the local climate, check out Sainte-Marie-sur-Semois Climate.