Last updated: August 27, 2025
September in IJmuiden, Netherlands showcases a delightful transition into autumn, with maximum temperatures reaching up to 24°C (75°F) and an average of 16°C (62°F), providing a pleasant atmosphere. As the month progresses, temperatures dip to a minimum of 12°C (53°F), reminding residents and visitors of the approaching seasonal change. Rainfall is notable, with 114 mm (4.5 in) accumulated over 13 days, contributing to the lush greenery that characterizes the region. Humidity levels hover around 83%, creating a refreshing yet slightly crisp air that is typical for this time of year. This combination of weather elements makes September a unique time to experience the coastal charm of IJmuiden.
In September, IJmuiden experiences a delightful transition as summer wanes and autumn approaches. With minimum temperatures averaging around 12°C (53°F), the crisp air begins to take hold, while the average highs reach a pleasant 24°C (75°F). This month strikes a perfect balance, offering a comfortable average of 16°C (62°F), making it an ideal time for outdoor activities and exploring the scenic beauty of the Dutch coast. The warmth of late summer lingers yet, giving way to cooler evenings that signal the changing seasons, inviting residents and visitors alike to enjoy the mild days and refreshing nights.
In September, IJmuiden experiences a notable increase in precipitation, measuring 114 mm (4.5 inches) over about 13 days, making it one of the wetter months of the year. This trend follows the peak of summer rain in August, which recorded 110 mm (4.3 inches), and sets the stage for the even wetter October ahead, with 150 mm (5.9 inches) anticipated. The transition into autumn becomes apparent as the frequency of rainy days begins to rise, signaling a shift from the often dryer summer months. This consistent precipitation not only enriches the lush landscapes of the Netherlands but also reinforces the region's reputation for varying weather patterns throughout the year.
As summer winds down, September in IJmuiden brings a noticeable increase in humidity, averaging around 83%. This uptick comes after a gradual decline from 87% in January to a modest 78% in August. The transition into autumn is marked by this slight rise, suggesting a return to the more humid conditions typical of earlier months. Following September, humidity is poised to increase once again, peaking at 86% in October. Overall, this trend illustrates the cyclical nature of humidity in IJmuiden, where the warmth of summer gives way to the cooler, invigorating breezes of autumn, creating a refreshing yet humid atmosphere.
As the summer winds down in September, IJmuiden, Netherlands, experiences a noticeable shift in the UV Index, which settles at a healthy 5, placing it in the moderate exposure category. This marks a decrease from the very high levels experienced in July and June, where the UV Index reached 8. With a burn time of 30 minutes, it’s a reminder that while the sun's intensity is waning, precautions are still essential. Following a sun-soaked August with its 7 index, September offers a more balanced approach to sun exposure, making it a great time for outdoor activities without the peak risks. For those interested in understanding the year-round trends, further details can be found at IJmuiden UV Index.
UV Risk Categories
As summer gradually draws to a close in IJmuiden, September still delights residents and visitors with a robust 331 hours of sunshine, showcasing a strong transition from the sun-soaked months of July and August. This vibrant month symbolizes the tail end of summer's warm embrace, even as the daylight begins to dwindle. The sunshine hours in September, while lower than the peak of summer, still reflect a cheerful brightness compared to the chillier days that lie ahead in October with only 245 hours of sunshine. This steady decline marks the shift to autumn, highlighting the fleeting yet beautiful nature of the Dutch summer as it makes way for the seasonal changes ahead. Overall, September offers a compelling glimpse of lingering warmth before the shorter days take over.
In September, IJmuiden, Netherlands, sees a 33% chance of sunny weather, marking a slight dip from the summer months but still reflecting a decent likelihood of clear skies as the season transitions to autumn. This month typically acts as a bridge between the balmy warmth of August, with its consistent 38% chance of sun, and the cooler, cloudier days of October, which drops to 28%. Overall, while the sun doesn't shine as often as in peak summer, September still offers opportunities for those seeking pleasant, sunlit days amidst the changing foliage.
In September, daylight in IJmuiden, Netherlands, begins to wane as the summer's long hours gradually recede. With approximately 12 hours of daylight, the month serves as a transitional period, slipping slightly from the 14 hours experienced in August. This pattern reflects a consistent trend throughout the year, where longer days in late spring and summer gradually give way to shorter daylight hours as autumn approaches. As the days shorten further into October and November, the shift in daylight serves as a reminder of the seasonal cycle, inviting a change in both the environment and daily activities. Embrace the softer glow of September, a month that balances the last warmth of summer with the hints of autumn's embrace.
As September rolls in IJmuiden, Netherlands, the wind takes on a gentler demeanor, averaging 5.3 m/s (12 mph). This marks a noticeable decline from the breezier summer months, where the winds peaked at 6.6 m/s (15 mph) in August. The transition into fall is evident, with wind speeds gradually ascending again as October approaches, teasing the sharper gusts of 7.8 m/s (18 mph). This shift not only signals a changing season but also enriches the coastal landscape, inviting a balance between the briskness of summer and the upcoming autumnal freshness. Overall, September embodies a calm before the storm, as the rhythm of the wind prepares to intensify once more.
Weather in IJmuiden varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in IJmuiden, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), creating a generally mild atmosphere with an average of 16°C (62°F). This month also sees considerable rainfall, with 114 mm (4.5 in) over about 13 days and humidity sitting at 83%. In contrast, January experiences much colder temperatures, dipping to a minimum of -3°C (27°F) and peaking at only 11°C (53°F), resulting in an average of just 6°C (43°F). Precipitation is lower at 75 mm (2.9 in) across 15 days, coupled with slightly higher humidity at 87%. For more details about January weather, you can check IJmuiden weather in January.
September and February showcase stark contrasts in weather. In September, temperatures range from a minimum of 12°C (53°F) to a pleasant average of 16°C (62°F), reaching a maximum of 24°C (75°F). The month experiences considerable rainfall, with 114 mm (4.5 in) of precipitation spread over 13 days and humidity averaging 83%. In contrast, February is much colder, with temperatures dropping as low as -6°C (22°F) and averaging around 5°C (42°F), peaking at 13°C (55°F). Although February sees less precipitation at 80 mm (3.1 in), it too rains on 13 days and has higher humidity levels at 87%. For a more detailed look at February weather, check IJmuiden weather in February.
When comparing the weather in September and March, it is clear that there are significant differences in temperature and conditions. September typically enjoys a milder climate, with average temperatures ranging from 12°C (53°F) to a pleasant 24°C (75°F), while March presents a cooler atmosphere with temperatures ranging from -6°C (22°F) to 13°C (56°F). Precipitation is more common in September, with 114 mm (4.5 in) over 13 days, compared to March, which receives 75 mm (3.0 in) spread over 14 days. Additionally, humidity levels are slightly higher in March at 86%, compared to September's 83%. For more detailed information about the weather in March, you can refer to IJmuiden weather in March.
When comparing the weather in September and April, notable differences emerge in temperature and precipitation. September boasts a milder atmosphere with average daily temperatures ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), making it significantly warmer than April, which experiences a cooler range of 2°C (37°F) to 21°C (70°F) and an average temperature of only 9°C (48°F). Additionally, September sees higher rainfall, with 114 mm (4.5 in) over 13 days, compared to April's 41 mm (1.6 in) spread over just 8 days. Despite the lower rainfall, April has a slightly higher humidity level at 85%, closely matching September's 83%. For more detailed insights on April weather, you can visit IJmuiden weather in April.
When comparing the weather in September and May, we notice notable differences in both temperature and precipitation. September tends to be warmer, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), while May sees cooler temperatures peaking at 22°C (73°F) and a minimum of 6°C (42°F). Additionally, September experiences more rain, with 114 mm (4.5 in) over 13 days, compared to May's 51 mm (2.0 in) over only 10 days. Interestingly, humidity remains quite similar in both months, with September at 83% and May slightly higher at 84%. For specific details on May weather, you can visit IJmuiden weather in May.
In comparing September and June weather, both months feature similar average temperatures, with September ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F) and June showing slightly cooler temperatures with a minimum of 10°C (51°F) and a maximum of 26°C (80°F). September experiences higher precipitation levels, totaling 114 mm (4.5 in) over 13 days, compared to June's 71 mm (2.8 in) across 10 days. Humidity is slightly higher in September at 83%, while June maintains a comfortable level at 81%. For more detailed information on June weather, you can refer to IJmuiden weather in June.
In comparing the weather of September and July, September tends to be cooler with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), while July features slightly higher temperatures, peaking at 28°C (83°F) with a minimum of 14°C (57°F). Moreover, September experiences more precipitation, totaling 114 mm (4.5 in) over 13 days, compared to July's 72 mm (2.8 in) over the same number of days. Humidity levels also differ slightly, with September averaging 83% and July at 80%. For more detailed information on July's weather, you can refer to IJmuiden weather in July.
In comparing the weather of September and August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), whereas August sees a warmer average with minimums at 13°C (55°F) and maximums reaching 27°C (81°F). Additionally, September experiences higher humidity levels at 83% compared to August's 78%, which can make the air feel more intense. Precipitation is also notable, with September receiving 114 mm (4.5 in) over 13 days, slightly more than August's 110 mm (4.3 in) over 16 days. For a more detailed look at August weather, you can check IJmuiden weather in August.
September and October present a noticeable transition in weather conditions. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), with an average of 16°C (62°F). However, October sees a drop in temperatures, with a minimum of 5°C (41°F) and an average of 14°C (57°F), peaking at 21°C (70°F). Additionally, precipitation increases in October to 150 mm (5.9 in) over 19 days, compared to September's 114 mm (4.5 in) over 13 days. Humidity also slightly rises in October to 86%, up from September's 83%. For more detailed information, check IJmuiden weather in October.
September generally offers milder temperatures compared to November, with average highs reaching up to 24°C (75°F) and lows around 12°C (53°F). In contrast, November sees much cooler conditions, with maximum temperatures only reaching 16°C (62°F) and minimums dropping to 3°C (37°F). While September experiences more overall warmth and sunshine, it also brings more precipitation, totaling 114 mm (4.5 in) across 13 days compared to November's 86 mm (3.4 in) over 17 days. Additionally, November's humidity slightly increases to 87%, while September sits at 83%. For a detailed look at November weather, check out IJmuiden weather in November.
September and December present contrasting weather patterns. In September, temperatures are generally milder, ranging from a minimum of 12°C (53°F) to a maximum of 24°C (75°F), while the average temperature hovers around 16°C (62°F). The month experiences moderate precipitation of 114 mm (4.5 in) over about 13 days, with humidity levels at 83%. In contrast, December sees a significant drop in temperatures, with a minimum of -1°C (31°F) and a maximum of only 12°C (54°F), averaging at 7°C (45°F). The precipitation increases slightly to 132 mm (5.2 in) over 21 days, along with a slight rise in humidity to 86%. For more detailed information about December weather, you can visit IJmuiden weather in December.
As September unfolds in IJmuiden, the weather begins to shift noticeably from the warmth of summer to the cooler embrace of autumn. With an average temperature around 16°C (62°F), it offers a gentle transition, though days can still reach a pleasant 24°C (75°F). However, it's also a month characterized by increased moisture, as evidenced by a higher number of rainy days, accumulating 114 mm (4.5 in) of precipitation. This blend of warm afternoons and more humid conditions creates a unique atmosphere—perfect for those who enjoy the beauty of early autumn. For a deeper dive into the climate trends of the area, explore IJmuiden Climate.