Last updated: August 27, 2025
September in Delft, Netherlands offers a delightful transition from summer warmth to autumn coolness. With a maximum temperature reaching 29°C (85°F) and an average of 16°C (60°F), the month provides comfortable days for exploration. However, minimum temperatures can dip to 6°C (42°F), reminding visitors to pack layers. Rainfall is not uncommon, with approximately 80 mm (3.1 in) spread over 12 days, contributing to the region's lush landscapes. The humidity level sits at a notable 82%, adding a refreshing element to the crisp air. Whether strolling through historical streets or enjoying the natural beauty, September in Delft offers a unique blend of warmth and charm.
As summer fades into autumn, September in Delft sees a gentle transition in temperatures, with early fall presenting an inviting climate. The month begins with minimums around 6°C (42°F) and peaks at 29°C (85°F), reflecting a warm end to the season. The average temperature settles at a comfortable 16°C (60°F), making it perfect for outdoor exploration. Notably, September offers a pleasant respite from the summer heat, with rising evening coolness hinting at the approaching cooler months. This blend of warmth and refreshing breezes creates an ideal atmosphere for both locals and visitors to enjoy the rich culture and scenic beauty of this charming Dutch city.
In September, Delft experiences a notable shift in weather patterns as the summer draws to a close. With an average precipitation of 80 mm (3.1 in), this month is marked by 12 wet days, making it one of the wetter periods in the year. The rainfall is slightly less than August's 88 mm, which indicates that while summer still lingers, the transition to autumn begins to assert itself. This gradual increase in precipitation is a precursor to the even wetter months ahead, especially October, which anticipates a jump to 102 mm (4.0 in). As the days shorten and temperatures begin to cool, September serves as a reminder of the changing seasons, with rain becoming an essential part of Delft's climate narrative.
In September, Delft experiences a notable rise in humidity, with levels averaging around 82%. This increase marks a transition from the relatively drier summer months of July and August, when humidity dipped to 80% and 76%, respectively. As autumn approaches, the humidity begins to creep up again, anticipating the moist conditions typical of the later months in the year. This gradual climb is part of a broader seasonal trend, as Delft typically sees its highest humidity levels during the winter months of November and December, where figures soar to 92%. As summer bids farewell, September serves as a reminder of the shifting climate, where the air feels heavier and prepares inhabitants for the wetter weather ahead.
As September unfolds in Delft, the UV Index settles at 5, indicating a moderate level of sun exposure. This marks a slight decline from the peak summer months, where the index reached 8 in both June and July, thus reminding us of the importance of sun protection even as temperatures begin to cool. With a burn time of 30 minutes, it's essential to be mindful of outdoor activities during the sun’s peak hours. As we transition into autumn, the UV levels still reflect significant sun intensity compared to winter months, which see indices as low as 1. Embrace this transition while staying sun-safe! For more details, you can check the Delft UV Index.
UV Risk Categories
September in Delft, Netherlands, marks a delightful transition as summer gently fades into autumn, capturing 329 hours of sunshine. This month showcases a robust continuation of bright days, following the peak summer months of July and June, where sunlit hours reached impressive heights of 425 and 419 hours, respectively. While September sees a natural decline from the summer's glory, it remains significantly brighter than the gray days of October, with its 243 hours. This trend highlights the charm of early autumn in Delft, where crisp air meets lingering warmth, affording residents and visitors alike the chance to bask in the mellow sun before the colder months set in.
In Delft, Netherlands, September showcases a moderate 33% chance of sunny weather, aligning with the slightly declining trend that begins in the summer months. While not as bright as the spring peak, which sees a 42% likelihood of sunshine in April, September remains on par with the sunlit days typical of late summer. This month serves as a transition into autumn, where the chances drop further, with October's sun peeking out only 29% of the time. Overall, while September offers a decent chance to enjoy the outdoors, it hints at the cozy, cloudier days ahead as the year progresses.
As summer fades, September in Delft, Netherlands, marks a gentle transition toward shorter days, with an average daylight duration of 12 hours. This gradual decrease follows the peak of 16-hour days in June and July, showcasing the diminishing sunlight as autumn approaches. Following the radiance of summer, which bathes the city in warmth and light, September retains a comfortable balance, offering a delightful mix of lingering daylight while hinting at the cozy evenings to come. As the month unfolds, the natural rhythms shift, paving the way for the shorter days of October ahead.
As summer transitions to autumn in Delft, September greets residents with a gentle breeze, featuring an average wind speed of 3.9 m/s (9 mph). This subtly lower wind speed compared to the summer months indicates a serene shift, heralding the cooler days ahead. Throughout the year, wind speeds have shown a dynamic pattern, peaking at 5.6 m/s (12 mph) in October, suggesting that September's calm is a fleeting interlude before the winds pick up again. The generally mild winds of this month invite leisurely strolls along the picturesque canals, making it the perfect time to enjoy the enchanting beauty of Delft as the leaves begin to change.
Weather in Delft varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Delft, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a cool 6°C (42°F) at night to a pleasant average of 16°C (60°F) during the day, peaking at 29°C (85°F). This month experiences about 80 mm (3.1 in) of precipitation over 12 days, with humidity averaging 82%. In comparison, January exhibits a chillier climate, where temperatures can drop to a minimum of -5°C (23°F), with an average of only 5°C (41°F) and a maximum reaching 13°C (56°F). Although it has slightly less precipitation at 60 mm (2.3 in) over 13 days, the humidity is higher at 91%. For more detailed insights about January weather, visit Delft weather in January.
September weather boasts a wider range of temperatures, with minimums around 6°C (42°F) and maximums reaching 29°C (85°F). The average temperature sits at a comfortable 16°C (60°F), making it a pleasant month despite the relatively high humidity of 82% and 80 mm of precipitation over 12 days. In contrast, February presents a much colder climate, with temperatures dipping as low as -8°C (18°F) and averaging only 5°C (42°F). The maximum temperature in February touches 17°C (63°F), and although it experiences slightly less precipitation at 64 mm (2.5 in), the humidity remains high at 89%. For a closer look at February weather specifics, you can check out Delft weather in February.
September and March exhibit notable differences in weather patterns. In September, temperatures range from a cooler minimum of 6°C (42°F) to a maximum of 29°C (85°F), with an average temperature of 16°C (60°F). The month typically sees about 80 mm (3.1 in) of precipitation spread over 12 days, along with a relatively high humidity level of 82%. In contrast, March experiences cooler weather overall, with temperatures starting at a minimum of -7°C (19°F) and peaking at 21°C (69°F), averaging around 7°C (45°F). Although it has slightly less precipitation at 67 mm (2.6 in) over 14 days, March has a higher humidity level of 87%. For more detailed information, you can check Delft weather in March.
September and April present distinct weather patterns in Delft, each with its own characteristics. In September, temperatures range from a minimum of 6°C (42°F) to a comfortable maximum of 29°C (85°F), making it generally warmer than April, which sees a minimum of -1°C (31°F) and a maximum of 26°C (79°F). Precipitation is more prevalent in September, totaling 80 mm (3.1 in) over 12 days, compared to April's 41 mm (1.6 in) over 9 days. Both months experience high humidity levels, with September at 82% and April slightly higher at 85%. For a detailed look at April's weather, you can check out Delft weather in April.
September and May both feature similar maximum temperatures of 29°C (85°F), but September generally offers warmer average temperatures, with a minimum of 6°C (42°F) compared to May's 3°C (38°F). While rainfall is more abundant in September, accumulating 80 mm (3.1 in) over 12 days, May experiences less precipitation at 59 mm (2.3 in) over the same number of days. Humidity levels remain constant in both months at 82%, contributing to the overall dampness in the air. For more detailed information on May's weather, you can refer to Delft weather in May.
In comparing the weather between June and September, we can observe some notable similarities and differences. Both months experience a maximum temperature that hovers around the mid to high 20s°C, with September reaching a peak of 29°C (85°F) and June slightly higher at 30°C (87°F). The average temperatures are quite similar, with June averaging 17°C (63°F) and September averaging 16°C (60°F). However, September tends to receive more rain, with a total precipitation of 80 mm (3.1 in) over 12 days, compared to June's 66 mm (2.6 in) across 10 days. Interestingly, both months share an identical humidity level of 82%, contributing to a moderately muggy atmosphere. For those curious about specific June weather details in Delft, you can find more information here: Delft weather in June.
In comparing the weather between September and July, September generally experiences cooler temperatures, with a minimum of 6°C (42°F) and an average of 16°C (60°F), while July boasts higher minimum temperatures of 10°C (50°F) and an average temperature of 18°C (65°F). July also sees significantly warmer maximum temperatures, peaking at 37°C (98°F) compared to September's maximum of 29°C (85°F). Despite having slightly less precipitation, July has a comparable number of rainy days, with 13 days of rainfall compared to September’s 12 days, making both months relatively humid at around 80-82%. For more information on July weather specifically, you can check this link: Delft weather in July.
In comparing the weather between August and September, it is clear that September experiences cooler temperatures, with a minimum of 6°C (42°F) compared to August's minimum of 10°C (50°F). The average temperature in September is 16°C (60°F), which is slightly lower than August's 19°C (66°F). While maximum temperatures reach 29°C (85°F) in September, they peak higher at 32°C (90°F) in August. Rainfall is relatively similar, with September receiving 80 mm (3.1 in) over 12 days and August receiving 88 mm (3.5 in) over 15 days. Additionally, humidity levels are higher in September at 82%, compared to 76% in August. For more detailed information about weather conditions in August, you can visit Delft weather in August.
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). During this month, rainfall totals around 80 mm (3.1 in) over approximately 12 days, accompanied by a humidity level of 82%.
Conversely, October sees cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 25°C (77°F), averaging at 13°C (55°F). The month is slightly wetter, with 102 mm (4.0 in) of precipitation spread across 16 days, and humidity increases to 89%.
For more detailed insights, you can check out Delft weather in October.
In comparing the weather conditions of September and November, notable differences emerge. September experiences a broader temperature range, with minimums around 6°C (42°F) and maximums reaching up to 29°C (85°F), offering an average of 16°C (60°F). Conversely, November cools significantly, with a minimum of 0°C (32°F) and an average temperature dropping to 8°C (47°F), peaking at a maximum of 18°C (65°F). Precipitation in September is higher, totaling 80 mm (3.1 in) over 12 days, while November sees 62 mm (2.4 in) across 14 days, indicating slightly wetter weather despite the lower overall precipitation. Additionally, humidity levels rise from 82% in September to a chilly 92% in November, making the latter month feel damp and cooler. For more specific details, check out Delft weather in November.
September and December weather exhibit stark contrasts. 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 about 16°C (60°F). The month sees approximately 80 mm (3.1 in) of precipitation over around 12 days, accompanied by relatively high humidity at 82%. In contrast, December brings much colder temperatures, with a minimum of -3°C (27°F) and a maximum of just 13°C (56°F), averaging 6°C (44°F). The precipitation increases to 100 mm (3.9 in) over 18 days, and humidity rises to 92%. For more specific details on December weather, check out Delft weather in December.
As summer fades, September in Delft brings a noticeable shift in the weather, with cooler temperatures that create a crisp ambiance. The month averages around 16°C (60°F), offering a pleasant respite from the heat of July and August. However, don't let the cooler days fool you; max temperatures can still reach up to 29°C (85°F) on occasion, creating a delightful contrast. Rain becomes more frequent, with 12 days of precipitation contributing to an overall humidity of 82%, which envelops the city in a damp embrace. This transitional period is perfect for experiencing the charm of Delft as it prepares for autumn, making it an ideal time for exploration. For a detailed understanding of the weather patterns throughout the year, check out Delft Climate.