Last updated: August 27, 2025
In September, the charming coastal town of Brielle, Netherlands, delights visitors with a blend of mild temperatures and refreshing breezes. Expect maximums reaching 29°C (85°F), while the vibrant average sits comfortably at 16°C (60°F), making it an ideal time for outdoor exploration. However, cooler evenings can dip to 6°C (42°F), so a light jacket is recommended. The month is marked by 80 mm (3.1 in) of rainfall spread over 12 days, contributing to the lush landscapes and vibrant scenery. With a humidity level of 82%, the air feels fresh yet cozy, perfectly complementing autumn’s arrival as nature starts to transform.
In September, Brielle, Netherlands, experiences a gentle transition from summer to autumn, with temperatures showcasing a comforting range. Minimums settle around 6°C (42°F), while averages rise to a pleasant 16°C (60°F). The days still hold onto the warmth of summer, peaking at a maximum of 29°C (85°F), allowing for delightful outdoor activities under the amber-hued skies. As the month progresses, a subtle coolness begins to creep in, hinting at the chillier months ahead. This blend of mild warmth and the crispness of fall makes September in Brielle a particularly enchanting time for residents and visitors alike.
In September, Brielle experiences a notable precipitation of 80 mm (3.1 inches), marking one of the wetter months of the year. This rainfall occurs over 12 days, indicating a persistently dynamic climate as summer transitions into autumn. Compared to August's peak of 88 mm (3.5 inches), September maintains significant moisture levels, suggesting a gradual reduction rather than an abrupt shift in weather patterns. As temperatures cool, the consistent rain falls alongside the shortening days, preparing the landscape for the wetter October ahead, which averages 102 mm (4.0 inches). Overall, September encapsulates the essence of late summer's lingering showers while hinting at the wetter months to follow.
As summer fades into autumn, September in Brielle experiences a notable resurgence in humidity, climbing back to 82%. This marks a shift from the drier air of August, which enjoyed a low of 76%, suggesting that the warmer months are gradually yielding to the cooler, more moisture-laden autumn air. Interestingly, September's humidity mirrors that of May, reflecting a seasonal balance where lingering warmth still carries the moisture from summer. As the days shorten and the air cools, the humidity is set to rise again in October, reinforcing the trend of higher moisture levels that characterizes the later months of the year in this charming Dutch town.
As summer transitions to autumn in Brielle, Netherlands, the UV Index experiences a notable decline in September, dropping to a moderate level of 5. This suggests that while sun exposure is still present, it's a good idea to enjoy the outdoors while taking some precautions, as the average burn time is approximately 30 minutes. Following the intense rays of June and July, where UV indices peaked at 8, September offers a more manageable sun exposure, making it an ideal time for outdoor activities. This trend reflects a gradual cooling and dimming of sunlight as the year progresses, but for those planning to soak up the sun, it's always wise to stay informed. For more details on UV levels throughout the year, check out the full Brielle UV Index.
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September in Brielle, Netherlands, offers a delightful transition from the vibrant summer months into the crispness of autumn. This month proudly showcases 329 hours of sunshine, a substantial drop from the sun-drenched days of July and August, yet a notable contrast to the dimmer light of the upcoming months. Following a peak in summer, the consistent decline in hours sunlit throughout the latter part of the year highlights the seasonal shift, with September still retaining a generous amount of daylight. As days gradually shorten, the golden hues of early fall paint the town, inviting residents and visitors alike to embrace the last rays of warmth before winter. It’s the perfect time to enjoy outdoor strolls along the scenic canals, basking in the remnants of summer's glow.
In Brielle, Netherlands, September offers a steady chance of sunshine, similar to the preceding summer months, with the likelihood resting at 33%. This figure reflects a gentle decline from the 42% peak in April, yet it indicates a consistent chance for those hoping to bask in the warm rays of autumn. As summer transitions into fall, September holds its ground alongside August and July, suggesting that while the sunny days may be fewer, they still contribute to a pleasant atmosphere. As the year progresses, the chances of sunshine noticeably dip in October and beyond, making September a delightful time to enjoy the lingering warmth before the colder months settle in.
As summer fades into autumn, September in Brielle, Netherlands, offers a gentle transition in daylight duration. This month boasts about 12 hours of daylight, a noticeable shift from the sun-drenched days of June and July, when the town basked in up to 16 hours of sunlight. Following the vibrant spring months, where daylight peaked at 15 hours in May, September signals a gradual descent, leading to October’s shorter days of 10 hours. As the season changes, residents feel the waning light, yet the warmth of early autumn remains inviting, allowing for plenty of opportunities to enjoy the changing scenery before the days shorten even further into winter.
In September, the winds in Brielle, Netherlands, begin to take on a more gentle character, with an average speed of 3.9 m/s (9 mph). This marks a noticeable decrease from the summer months, where wind speeds hovered around 4.1 m/s to 4.8 m/s. As autumn approaches, the breezes become softer, offering a tranquil contrast to the harsher winds of the winter months ahead, which see an uptick to 5.6 m/s (12 mph) in October. This trend illustrates the shifting seasons, inviting both locals and visitors to enjoy the increasingly crisp air while embracing the serene beauty of Brielle's coastal landscape.
Weather in Brielle varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Brielle, focusing on differences in temperature, rainfall, humidity, and UV levels.
September's weather is notably milder, with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 29°C (85°F) and an average of 16°C (60°F). This month experiences about 80 mm (3.1 in) of precipitation over 12 days and a humidity level of 82%. In contrast, January brings colder conditions, featuring a range from a minimum of -5°C (23°F) to a maximum of 13°C (56°F), with an average temperature of 5°C (41°F). The month sees slightly less precipitation at 60 mm (2.3 in) over 13 days and higher humidity levels at 91%. For more information on the weather specifics in this month, you can check Brielle weather in January.
September and February offer contrasting weather conditions, highlighting the transition from late summer to winter. In September, temperatures range from a mild 6°C (42°F) at night to a warm 29°C (85°F) during the day, with an average of 16°C (60°F). This month also sees about 80 mm (3.1 in) of precipitation spread across 12 days, accompanied by a humidity level of 82%. In stark contrast, February presents much cooler conditions, with temperatures dropping to a minimum of -8°C (18°F) and reaching a maximum of 17°C (63°F), averaging at 5°C (42°F). Precipitation is lighter at 64 mm (2.5 in), also over 12 days, but the humidity is slightly higher at 89%. For a detailed look at the February weather specifically, you can visit Brielle weather in February.
When comparing the weather in September and March, it's evident that both months have distinct characteristics. September tends to be warmer, with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 29°C (85°F), averaging around 16°C (60°F). In contrast, March is cooler, with average temperatures starting at -7°C (19°F) and peaking at 21°C (69°F) but averaging only 7°C (45°F). Regarding precipitation, September receives slightly more, at 80 mm (3.1 in) over 12 days, while March sees 67 mm (2.6 in) spread across 14 days. Humidity levels are relatively high in both months, with March being slightly more humid at 87% compared to September's 82%. For more detailed insights, you can check the specific conditions in Brielle weather in March.
In comparing the weather of September and April, we see notable differences in temperature and precipitation patterns. September boasts a much milder average temperature of 16°C (60°F), with daytime highs reaching up to 29°C (85°F), while April's average is cooler at 9°C (49°F), peaking at 26°C (79°F). The minimum temperatures in April can drop to -1°C (31°F), making it significantly cooler than September's mild low of 6°C (42°F). Additionally, September experiences more rainfall, with 80 mm (3.1 in) over about 12 days, compared to April's 41 mm (1.6 in) over 9 days. The humidity levels are relatively comparable, with September at 82% and April slightly higher at 85%. For more specific details on April weather, you can check Brielle weather in April.
September and May offer distinct weather experiences, though they share some similarities. In September, temperatures can range from a cool 6°C (42°F) to a warm 29°C (85°F), with an average of 16°C (60°F). The month sees about 80 mm (3.1 in) of precipitation over 12 days, while maintaining a humidity level of 82%. In contrast, May presents a more moderate temperature range, with minimums around 3°C (38°F) and similar maximums of 29°C (85°F), averaging 13°C (55°F). Additionally, May experiences less precipitation at 59 mm (2.3 in) over the same number of days, yet retains the same humidity levels of 82%. For a detailed look at the weather conditions in May, check out Brielle weather in May.
When comparing the weather in September and June, both months exhibit similar humidity levels at 82%. However, September tends to have a wider temperature range, with minimums around 6°C (42°F) and maximums reaching 29°C (85°F), compared to June's slightly warmer temperatures, where the minimum is 7°C (45°F) and the maximum is 30°C (87°F). Additionally, September experiences more precipitation over more days, totaling 80 mm (3.1 in) across 12 days, whereas June has 66 mm (2.6 in) of rain spread over 10 days. For more detailed information on June weather, you can visit Brielle weather in June.
When comparing the weather in September and July, several notable differences emerge. September typically experiences cooler temperatures, with a minimum of 6°C (42°F) and a maximum of 29°C (85°F), resulting in an average temperature of 16°C (60°F). In contrast, July is warmer, boasting a minimum temperature of 10°C (50°F) and a maximum of 37°C (98°F), leading to an average of 18°C (65°F). While September sees higher overall precipitation at 80 mm (3.1 in) over 12 days, July has slightly less rain at 67 mm (2.6 in) spread over 13 days. Humidity remains relatively consistent between the months, with September at 82% and July at 80%. For a deeper look into July’s weather specifics, you can read more at Brielle weather in July.
In comparing the weather between August and September, September generally experiences cooler temperatures, with a minimum of 6°C (42°F) and a maximum of 29°C (85°F), which is a notable drop from August's warmer range of 10°C (50°F) to 32°C (90°F). The average temperature in September is also lower at 16°C (60°F) compared to August's 19°C (66°F). Additionally, September sees slightly less precipitation at 80 mm (3.1 in) over 12 days, while August has 88 mm (3.5 in) of rain across 15 days. Humidity is higher in September at 82% compared to 76% in August, creating a more humid feel to the cooler weather. For further details, you can view Brielle weather in August.
September and October present a notable transition in weather patterns. In September, temperatures range from a minimum of 6°C (42°F) to a maximum of 29°C (85°F), with an average of 16°C (60°F). The month sees about 80 mm (3.1 in) of precipitation spread across 12 days, accompanied by a relatively lower humidity of 82%. In contrast, October experiences cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 25°C (77°F), averaging around 13°C (55°F). This month also brings increased precipitation, totaling 102 mm (4.0 in) over 16 days, and a rise in humidity to 89%. For more detailed insights, you can check out Brielle weather in October.
In September, the weather is warmer, with temperatures ranging from a chilly 6°C (42°F) to a pleasant max of 29°C (85°F) and an average of 16°C (60°F). The month experiences 80 mm (3.1 in) of precipitation over about 12 days and maintains a humidity level of 82%. In contrast, November brings a significant drop in temperature, with lows dipping to 0°C (32°F) and an average temperature of only 8°C (47°F), peaking at 18°C (65°F). Although the total precipitation is slightly lower at 62 mm (2.4 in), it occurs on 14 days, resulting in a humidity level that rises to 92%. For a more detailed look at what to expect, check out Brielle weather in November.
In September, temperatures are generally mild, with minimums around 6°C (42°F) and averaging 16°C (60°F), peaking at a warm 29°C (85°F). The month sees about 80 mm (3.1 in) of precipitation over approximately 12 days, while humidity remains relatively high at 82%. In contrast, December brings much colder weather, with temperatures dipping to a minimum of -3°C (27°F) and only averaging 6°C (44°F). The maximum temperature hovers around 13°C (56°F), and precipitation increases to 100 mm (3.9 in) over 18 days, accompanied by even higher humidity at 92%. For a more detailed look at the conditions in December, you can check Brielle weather in December.
As summer fades into autumn, September in Brielle offers a delightful transition marked by mild temperatures and increased humidity. With maximum highs reaching around 29°C, the early part of the month retains some warmth, while the average cools to a refreshing 16°C, perfect for outdoor activities. However, don't forget your umbrella, as this month brings about 80 mm of precipitation over roughly half the days, making it noticeably wetter than the dry summer months. This blend of warmth and moisture creates a unique atmosphere, inviting both locals and visitors to embrace the beauty of the changing season. For more detailed insights into how these conditions shape the climate, visit Brielle Climate.