Last updated: August 27, 2025
September in Aalsmeer, Netherlands offers a delightful mix of mild weather and occasional rain, with average temperatures around 15°C (60°F). The month experiences maximum highs reaching 28°C (83°F), providing warmer days that invite outdoor activities, while nights cool down to a brisk 6°C (43°F). With 91 mm (3.6 in) of precipitation spread over 12 days, humidity levels hover around a notable 83%, giving the air a refreshing feel. This transitional month sets the perfect stage for witnessing the beauty of the changing seasons amid the charm of Aalsmeer.
In September, Aalsmeer, Netherlands, begins to transition into the cooler embrace of autumn, featuring a delightful mix of temperatures. With minimums around 6°C (43°F) and average highs reaching up to 28°C (83°F), the month offers a pleasant climate for outdoor activities. This is a notable shift from the peak summer months, as the average temperature settles at a comfortable 15°C (60°F), striking a balance between warmth and the crispness of fall. As summer warmth starts to wane, September provides a perfect opportunity to enjoy the lush landscapes before winter sets in, inviting visitors to experience the scenic beauty of this charming Dutch town.
September in Aalsmeer, Netherlands, marks a transition into the wetter autumn months, with precipitation totaling 91 mm (3.6 in) over approximately 12 days. This amount is slightly lower than August's peak of 93 mm, indicating a gradual decline as summer ends. However, September maintains a significant rainfall pattern, just shy of the heavier deluge expected in October, which sees an increase to 110 mm (4.3 in). The consistency in rainfall from late summer into early autumn suggests an ongoing shift towards higher precipitation levels, setting the stage for the typically soggier months ahead. Despite the drop in rainfall compared to the summer months, September’s overcast and damp conditions contribute richly to the lush landscape, creating a vibrant canvas of colors as leaves begin to turn.
In September, Aalsmeer experiences a slight uptick in humidity, reaching 83%. This marks a transition from the warm, drier months of summer, where humidity dipped to a low of 78% in August, to a more humid setting as autumn approaches. Notably, the trend across the year indicates higher humidity levels in the early part of the year, peaking at 87% in both January and February. As the seasons shift, humidity gradually declines until mid-summer before seeing a modest rise again in fall. The pattern reveals Aalsmeer’s climate as consistently humid, particularly in the colder months, creating an inviting yet damp atmosphere throughout the year.
As summer transitions to autumn, September in Aalsmeer, Netherlands, reveals a moderate UV Index of 5, indicating that while sun exposure is more intense than in the earlier months, it remains manageable. With a burn time of 30 minutes, it's essential to balance outdoor activities with sun safety, using sunscreen or protective clothing when basking in the daylight. This month typically sees a decline from the peak UV levels of July and June, which were at 8, categorized as very high. Looking ahead, October's UV Index dips further to 3, so now is a perfect time to enjoy the outdoors while being mindful of the sun's rays. For more details, visit Aalsmeer UV Index.
UV Risk Categories
September in Aalsmeer follows a vibrant summer, with the sun gracing the town for 326 hours, marking a slight decline from the peak of 423 hours in July. This month continues to benefit from the lingering warmth of late summer, with daylight still abundant enough to enjoy outdoor activities. As the days grow shorter, the sun gradually retreats into autumn, leading to a noticeable drop in sunlight hours. The shift from summer's radiance to the approaching chill of October, which sees a further decrease to 239 hours, highlights the transitional nature of this time, inviting residents and visitors alike to savor the last golden rays of sunshine before the seasons change.
In Aalsmeer, Netherlands, September tends to offer a moderate chance of sunny weather with approximately 32% likelihood of sunshine. This marks a slight decline from the summer months, where July and August both enjoy a 34% chance of sunny days. The trend shows a gradual transition from the brighter and sunnier conditions of early summer, peaking in April at 41%, to the cooler, cloudier autumn months that follow. As the year progresses into October and November, sunshine levels decrease to 27% and 22% respectively, indicating that while September still holds some summer remnants, residents should prepare for the impending autumnal shifts. Overall, while September's sun may not blaze as brightly as in the height of summer, it still offers a respectable opportunity to enjoy some cheerful rays before the drearier days of fall arrive.
As summer fades into fall, September in Aalsmeer, Netherlands, brings a notable shift in daylight duration, offering about 12 hours of light each day. This marks a gentle decline from the sun-drenched 16 hours of daylight seen in the peak summer months of June and July. Just as nature transitions, so does the light, cascading from the 15 hours in May to the cozy ambience of early fall. September ushers in shorter days, resembling the increasing twilight of October's 10 hours; this gradual decrease serves as a reminder of the changing seasons and the approach of the winter months, where daylight shrinks to just 7 hours by December.
As September arrives in Aalsmeer, the average wind speed gently eases to 3.9 m/s (9 mph), marking the transition into autumn with noticeably calmer breezes compared to the summer months. This slight decrease from August's 4.8 m/s (11 mph) indicates a shift in the seasonal dynamics, as the warm summer winds give way to the crisp, cooler air of fall. Historically, September's winds are among the lightest of the year, a trend that continues into October when speeds pick up again to 5.6 m/s (13 mph). This pattern reflects a gradual return to more blustery conditions typical of the changing seasons, inviting nature lovers to enjoy the serene beauty of Aalsmeer as it prepares for autumn's embrace.
Weather in Aalsmeer varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Aalsmeer, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January display contrasting weather patterns in Aalsmeer. In September, temperatures range from a mild 6°C (43°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (60°F). The month also experiences relatively high humidity at 83% and receives about 91 mm (3.6 in) of precipitation over 12 days. In stark contrast, January sees much colder conditions, with temperatures dropping to a minimum of -5°C (24°F) and a maximum of only 13°C (56°F), averaging around 5°C (41°F). Additionally, while January has fewer total precipitation days (13) and lower total precipitation (63 mm or 2.5 in), the humidity is slightly higher at 87%. For more detailed information on January weather, you can check Aalsmeer weather in January.
In September, the weather is significantly warmer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), and an average of 15°C (60°F). This month also experiences higher precipitation levels, with 91 mm (3.6 in) of rain over 12 days and a humidity level of 83%. In contrast, February brings much colder temperatures, with a minimum of -8°C (17°F) and an average of just 5°C (41°F). The maximum temperature in February reaches only 16°C (62°F), and while the total precipitation is somewhat lower at 72 mm (2.8 in), it also occurs over 12 days, accompanied by a higher humidity of 87%. For more details on February weather, you can visit Aalsmeer weather in February.
When comparing the weather in September and March, significant differences emerge in temperature and precipitation patterns. September experiences milder temperatures with a minimum of 6°C (43°F) and an average of 15°C (60°F), peaking at a warm 28°C (83°F). In contrast, March is noticeably cooler, starting at a minimum of -7°C (19°F) and averaging just 7°C (44°F), with a maximum of 19°C (67°F). In terms of rainfall, September records 91 mm (3.6 in) across 12 days, while March sees slightly less precipitation at 72 mm (2.8 in) over 15 days. Humidity levels are relatively high in both months, with September at 83% and March slightly higher at 86%. For more detailed insights, you can explore Aalsmeer weather in March.
September and April present contrasting weather patterns, reflecting the transition between summer and autumn and the awakening of spring, respectively. In September, temperatures range from a cool 6°C (43°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (60°F). This month is characterized by higher precipitation, totaling 91 mm (3.6 in) over 12 days, which contributes to an average humidity level of 83%. In contrast, April experiences more moderate temperatures, with a minimum of 0°C (32°F) and a maximum of 25°C (76°F), averaging around 9°C (49°F). The precipitation is significantly lower at 45 mm (1.8 in) spread over 10 days, leading to slightly increased humidity at 85%. For specific details, you can explore Aalsmeer weather in April.
In comparing September and May weather, both months display similar maximum temperatures, with September peaking at 28°C (83°F) and May at 28°C (82°F). However, September tends to be warmer overall, with an average temperature of 15°C (60°F) compared to May's average of 13°C (55°F). September also sees more precipitation, with 91 mm (3.6 in) over 12 days, whereas May has a total of 63 mm (2.5 in) during the same number of days. Both months feature high humidity levels, with September at 83% and May slightly higher at 84%. For more detailed weather information, you can visit Aalsmeer weather in May.
In comparing the weather of September and June, notable differences emerge. September exhibits a broader temperature range, with minimums as low as 6°C (43°F) and maximums peaking at 28°C (83°F), leading to an average of 15°C (60°F). The month experiences slightly higher precipitation, totaling 91 mm (3.6 in) over 12 days, accompanied by a humidity level of 83%. In contrast, June starts warmer, with minimum temperatures at 9°C (48°F) and maximums reaching up to 30°C (86°F), yielding an average temperature of 17°C (63°F). Precipitation in June is a bit lower at 77 mm (3.0 in) over 11 days and a slightly lower humidity of 81%. For more detailed climate trends, you can visit Aalsmeer weather in June.
When comparing the weather in September and July, notable differences emerge in both temperature and precipitation. September sees a wider temperature range, with minimums dropping to 6°C (43°F) and maximums reaching up to 28°C (83°F), while the average temperature is 15°C (60°F). In contrast, July is generally warmer, with minimum temperatures of 10°C (51°F) and maximums peaking at 34°C (94°F). The average temperature for July stands at 18°C (65°F). Both months experience significant humidity, but September's is slightly higher at 83% compared to July's 80%. Precipitation also varies, with September receiving 91 mm (3.6 in) over 12 days, while July experiences 72 mm (2.8 in) over 13 days. For a more detailed look at July's weather, check out Aalsmeer weather in July.
In comparing the weather of September and August, it’s clear that September experiences cooler temperatures, with a minimum of 6°C (43°F) and an average of 15°C (60°F), while August maintains milder conditions, starting at a minimum of 10°C (51°F) and averaging 18°C (65°F). The maximum temperatures in August also reach higher, peaking at 31°C (87°F), compared to September's maximum of 28°C (83°F). Precipitation levels between the two months are quite similar, with September seeing 91 mm (3.6 in) over 12 days and August slightly higher at 93 mm (3.7 in) over 15 days. Interestingly, September has higher humidity at 83% compared to August's 78%, contributing to a more humid atmosphere as summer transitions to fall. For a detailed comparison of the weather patterns, you can refer to Aalsmeer weather in August.
In September, the weather is warmer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), averaging around 15°C (60°F). The month experiences moderate precipitation of 91 mm (3.6 in) over 12 days, alongside a high humidity level of 83%. In contrast, October sees a drop in temperatures, with lows reaching 3°C (38°F) and highs peaking at 24°C (75°F), averaging 13°C (55°F). Precipitation increases to 110 mm (4.3 in) over 17 days, and humidity rises slightly to 86%. For a detailed look at October conditions, check out Aalsmeer weather in October.
September weather presents a warm transition from summer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F) and an average of 15°C (60°F). This month sees a fair amount of rainfall, totaling 91 mm (3.6 in) over approximately 12 days, accompanied by a humidity level of 83%. In contrast, November marks a significant drop in temperature, where the minimum dips to -1°C (31°F) and the average settles at 8°C (47°F), peaking at 18°C (64°F). Although November receives less precipitation, at 64 mm (2.5 in) over about 14 days, it has a slightly higher humidity of 87%. For more details on November's weather, check out Aalsmeer weather in November.
In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), with an average of about 15°C (60°F), making it a relatively warm month. However, the weather is quite humid at 83%, and there's a total of 91 mm (3.6 in) of precipitation over 12 days. In contrast, December brings much colder temperatures, with a minimum of -3°C (27°F) and a maximum of 13°C (55°F), averaging just 6°C (43°F). December experiences slightly more precipitation at 103 mm (4.1 in) across 19 days, and the humidity rises to 86%. This significant drop in temperature and increase in precipitation make December a stark contrast to the milder conditions of September. For a more detailed view of December weather, you can visit Aalsmeer weather in December.
As September unfolds in Aalsmeer, the weather ushers in a unique blend of warmth and humidity that starkly contrasts with the preceding summer months. With temperatures dipping from the highs of summer, those seeking the lingering sunshine will enjoy occasional warm days, while cooler mornings remind us of the onset of autumn. Average humidity remains elevated, contributing to a rich atmospheric feel, even as rainfall increases with a notable 12 rainy days throughout the month. This shift marks a transition period, ideal for appreciating the changing foliage and preparing for the upcoming season. For more detailed insights, check out Aalsmeer Climate.