Last updated: March 17, 2025
September in Holywood, United Kingdom, showcases a mild climate characterized by a maximum temperature of 20°C (68°F) and an average of 13°C (56°F). As the month progresses, temperatures dip to a minimum of 8°C (46°F), making early autumn feel quite brisk. With precipitation totaling 95 mm (3.8 in) over 17 days, expect frequent rain, contributing to the region’s lush, green landscapes. The humidity, sitting at a notable 88%, adds a touch of dampness to the air, reminding visitors of the coastal charm that defines this picturesque locale.
As September rolls into Holywood, United Kingdom, it marks a delightful transition from the warmth of summer to the crispness of autumn. With temperatures ranging from a minimum of 8°C (46°F) to a pleasant maximum of 20°C (68°F), the month offers a comfortable average of 13°C (56°F). This slight dip from the previous months indicates a gradual cooling trend, setting the stage for the upcoming fall. The month boasts moderate weather, ideal for outdoor activities, as the lingering warmth of late summer begins to mingle with the cooler, refreshing breezes of autumn. Whether you're exploring the scenic coast or simply enjoying the changing leaves, September's balanced climate makes Holywood a lovely spot for both adventure and relaxation.
In September, Holywood experiences a significant shift in weather patterns as the month brings an average precipitation of 95 mm (3.8 in) over approximately 17 days. This marks a continuation of the wetter trend seen in the preceding months, particularly August, which recorded the highest rainfall of the year at 129 mm (5.1 in). While September's figures are not as high, they still underscore the transition into the autumn season, leading up to even greater precipitation in the following months. As the year progresses, the rainfall tends to intensify, with October averaging 125 mm (4.9 in) and November even higher at 128 mm (5.1 in), indicating that Holywood is no stranger to drizzly days as it heads deeper into fall.
As September arrives in Holywood, United Kingdom, the humidity increases to 88%, marking a subtle yet notable rise from the previous months. This uptick reflects a trend of late summer moisture that blankets the region, following the consistent humidity levels of 86% seen in both July and August. September's increased humidity signals the transition into autumn, continuing to climb slightly before peaking in October at 89%. This gradual rise emphasizes the lingering summer warmth and prepares the landscape for the wetter months ahead, maintaining the area’s characteristic mildness as the seasons change. Overall, the data illustrates a steady humidity pattern throughout the year, with September acting as a bridge between summer and autumn.
As summer transitions into autumn in Holywood, United Kingdom, September presents a moderate UV Index of 5, indicating that while sun exposure is generally safe, some precautions should still be taken. With a burn time of 30 minutes, it’s essential to remain mindful of the sun's intensity, especially after a season of higher UV levels in July and August, which peaked at 8. This month reflects a return to more manageable conditions similar to those seen in the spring months of April and May. As outdoor activities become more frequent in this transition period, staying informed about the UV Index remains crucial. For more details on UV safety, check out Holywood UV Index.
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As summer transitions into autumn, September in Holywood showcases a generous 302 hours of sunshine, marking a significant decline from the sun-drenched days of July and August. This month’s hours, while lower than the peak summer months, still reflect a delightful warmth that lingers in the air. Notably, the sunshine begins to diminish more sharply in October, which typically sees only 233 hours, hinting at the onset of the cooler, darker months ahead. The overall trend reveals a gradual decrease in sunshine hours as the year progresses, with a stark contrast to the vibrant brightness of spring and summer, inviting residents and visitors alike to relish the last golden rays before the winter chill sets in.
In Holywood, United Kingdom, the likelihood of sunny weather in September stands at a modest 22%, marking it as one of the least sunny months of the year, alongside August. As summer fades, this trend reflects a broader annual pattern where sunshine peaks in April, with a notable 48% chance, then dips throughout the warmer months before hitting its annual low in the winter months. Overall, the consistent decrease in the probability of sunny days from May through to September suggests that as autumn approaches, residents can generally expect more cloud cover and less sunshine, aligning well with the typical British weather narrative.
As summer fades into autumn, September in Holywood, United Kingdom, offers a delightful blend of sunlight and crisp air, with approximately 12 hours of daylight. This marks a gentle decline from the sun-drenched days of June and July, where daylight peaked at a glorious 17 hours. The gradual reduction in daylight hours signals the changing seasons, transitioning from the vibrant energy of summer to the cooler embrace of fall. With daylight decreasing from 14 hours in August to 12 in September, residents and visitors alike can relish the lingering warmth while preparing for the cozy days of October ahead, when daylight dips further to 10 hours. This rhythm of light and shadow throughout the year beautifully encapsulates the essence of life in Holywood.
As September arrives in Holywood, United Kingdom, the wind begins to pick up slightly from the summer's calm breezes, averaging around 4.2 m/s (9 mph). This gentle airflow marks a shift from July and August, where the winds were the most tranquil of the year, with averages dipping to 3.4 m/s (8 mph) and 3.9 m/s (9 mph) respectively. The early autumn months herald a return to more robust winds, paving the way for October's higher average of 6.1 m/s (14 mph). This gradual increase in wind speed suggests a transition not only in weather patterns but also in the natural landscape, as the vibrant colors of fall begin to unfurl. The September wind, while still mild, hints at the changes to come, inviting residents and visitors alike to embrace the fresh, crisp air of the season.
The weather in Holywood changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Holywood and find detailed weather information for every month.
In comparing the weather of September and January, September typically enjoys milder temperatures, ranging from a minimum of 8°C (46°F) to a maximum of 20°C (68°F) and an average of 13°C (56°F). In contrast, January features chillier conditions with temperatures peaking at 13°C (56°F) and dipping to a minimum of 1°C (33°F), averaging only 6°C (44°F). Precipitation is slightly higher in September at 95 mm (3.8 in) over 17 days, compared to January's 78 mm (3.1 in) falling over 14 days. Despite being slightly more humid in September at 88%, January maintains a similar humidity level of 87%. For a closer look at the specifics of January weather in Holywood, you can check this link: Holywood weather in January.
September and February present distinct weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a pleasant average of 13°C (56°F), with maximums reaching up to 20°C (68°F). Although September is relatively mild, it also sees significant rainfall, with approximately 95 mm (3.8 in) of precipitation over 17 days and humidity levels at 88%. In contrast, February is much cooler, with temperatures ranging from a low of 1°C (33°F) to an average of 6°C (43°F), peaking at 12°C (54°F). While February experiences slightly higher rainfall, totaling 111 mm (4.4 in) over 16 days, the humidity remains close, at 86%. For more specifics on February's weather, you can visit Holywood weather in February.
In comparing the weather conditions of September and March, we notice significant differences. September experiences milder temperatures, with an average of 13°C (56°F) and maximums reaching up to 20°C (68°F), while March is considerably cooler, averaging only 7°C (44°F) and peaking at 14°C (57°F). Both months have similar precipitation levels, around 94-95 mm, and both receive rainfall on approximately 17 days. However, September tends to be slightly more humid at 88%, compared to March's 86%. For a detailed outlook on March weather, you can check out Holywood weather in March.
In comparing the weather of September and April, September typically offers milder temperatures with a minimum of 8°C (46°F) and an average of 13°C (56°F), while April experiences cooler conditions, starting at a minimum of 2°C (36°F) and averaging 8°C (47°F). Additionally, September tends to be wetter, with precipitation measuring 95 mm (3.8 in) over 17 days, compared to April's 45 mm (1.8 in) across just 10 days. Humidity levels are relatively high in both months, with September at 88% and April slightly lower at 85%. For a detailed overview, you can check Holywood weather in April.
September weather tends to be milder compared to May, with average temperatures reaching up to 13°C (56°F) and maximums of 20°C (68°F), while May has a slightly cooler average of 10°C (51°F) and maximums at 17°C (62°F). Precipitation is higher in September, with 95 mm (3.8 in) spread over 17 days, compared to May's 69 mm (2.7 in) over just 12 days. Additionally, September's humidity is slightly higher at 88%, compared to 82% in May. For more details on the weather during May, check out Holywood weather in May.
In comparing the weather of September and June, we see some notable similarities and differences. Both months enjoy a minimum temperature around 8°C, with average temperatures slightly higher in June at 13°C compared to 13°C in September. The maximum temperatures are quite close as well, with June peaking at 19°C and September reaching 20°C. Precipitation levels are similar, with September receiving 95 mm over 17 days and June slightly lower at 93 mm over 15 days. Notably, September experiences a higher humidity level at 88%, compared to June's 84%. For a more detailed look at June weather, you can visit Holywood weather in June.
In comparing the weather of September and July, we observe a slight decline in average temperatures, with September registering an average of 13°C (56°F) compared to July's 14°C (58°F). The maximum temperatures remain consistent at 20°C (68°F) for both months, while September experiences a slightly cooler minimum temperature of 8°C (46°F) compared to July's 9°C (49°F). Precipitation is more frequent in September with 95 mm (3.8 in) over 17 rainy days, whereas July sees a total of 108 mm (4.2 in) over just 15 days. Humidity levels are also marginally higher in September at 88%, compared to 86% in July. For more detailed insights into July's weather, you can visit Holywood weather in July.
In comparing the weather between September and August, September generally presents cooler temperatures, with a minimum of 8°C (46°F) and an average of 13°C (56°F), while August stays slightly warmer, starting at a minimum of 10°C (51°F) and averaging 14°C (58°F). Although August has a higher maximum temperature of 19°C (66°F) compared to September's 20°C (68°F), the overall climate in September becomes noticeably wetter, experiencing 95 mm (3.8 in) of precipitation over 17 days, compared to August's 129 mm (5.1 in) spread over 19 days. Humidity levels are also slightly higher in September at 88%, compared to 86% in August. For more detailed insights on the weather during August, you can explore Holywood weather in August.
September and October show a noticeable shift in weather patterns. In September, temperatures range from a minimum of 8°C and average around 13°C, reaching highs of 20°C, while October sees a dip with minimum temperatures of 5°C and an average of 11°C, peaking at 17°C. Precipitation also increases in October, totaling 125 mm over 19 days compared to September's 95 mm over 17 days. Humidity remains relatively constant, slightly rising from 88% in September to 89% in October. For more detailed insights on the weather during this time, you can check Holywood weather in October.
In September, temperatures range from a minimum of 8°C to a maximum of 20°C, with an average of 13°C. The month experiences relatively moderate precipitation of 95 mm spread across 17 days, accompanied by high humidity levels at 88%. In contrast, November brings cooler temperatures, with a minimum of 3°C and a maximum of 14°C, resulting in an average of 9°C. Rainfall increases to 128 mm over 21 days, and humidity is slightly higher at 90%. For more detailed information, you can check Holywood weather in November.
September and December exhibit contrasting weather patterns, with September typically being milder and more pleasant. The average temperature in September hovers around 13°C (56°F), with maximums reaching up to 20°C (68°F), whereas December sees cooler conditions with an average of just 7°C (45°F) and maximums hitting 13°C (55°F). Both months experience significant precipitation, but December is slightly wetter, accumulating 118 mm (4.7 in) compared to September's 95 mm (3.8 in), and both months have similar humidity levels, hovering around 86-88%. For a detailed look at December weather, you can check Holywood weather in December.
As September arrives in Holywood, the weather begins to shift noticeably, offering a blend of mild temperatures and increased rainfall compared to the preceding summer months. With an average temperature that cools down and humidity reaching peaks, this month often presents a more unpredictably damp atmosphere, marked by frequent showers. The chances of experiencing rain are heightened, contributing to a refreshing yet sometimes challenging outdoor experience. For those planning visits or outdoor activities, it’s advisable to prepare for wet conditions while appreciating the beautiful transition to autumn. To delve deeper into the seasonal nuances of Holywood's weather, check out Holywood Climate.