Last updated: March 17, 2025
In Dalkey, Ireland, September typically showcases a maximum temperature of 20°C (68°F), providing a pleasant backdrop for early autumn activities. The average temperature hovers around 14°C (57°F), while cool nights can drop to a minimum of 7°C (45°F). This month witnesses 82 mm (3.2 in) of precipitation over about 14 days, contributing to the lush, green landscape characteristic of the region. With an average humidity level of 86%, visitors can expect a decidedly damp atmosphere, perfect for cozy evenings and storytelling by the fire.
September in Dalkey, Ireland marks a delightful transition into autumn, where temperatures begin to cool yet remain comfortably mild. With a minimum temperature of 7°C (45°F) and an average reaching 14°C (57°F), the month sees highs of around 20°C (68°F), making it one of the more pleasant months of the year. This gradual drop from the summer warmth, evident as it moves from 20°C (68°F) in August, creates a crisp atmosphere, perfect for enjoying the stunning coastal scenery and vibrant autumn hues. As the days shorten, the refreshing evenings invite cozy gatherings, underscoring the charm of Dalkey in this enchanting season.
September in Dalkey, Ireland, greets residents and visitors with a moderate rainfall average of 82 mm (3.2 in), falling over 14 days. This marks a slight decrease from the wetter August, which saw 96 mm (3.8 in) of precipitation during 16 days, embodying the transition from summer's lushness to autumn's embrace. As the month progresses, the weather gradually shifts toward heavier autumnal rains, paving the way for October's anticipated 101 mm (4.0 in). Overall, September serves as a gentle reminder of the changing seasons, balancing between lingering summer showers and the impending downpours of fall.
September in Dalkey, Ireland, marks a notable continuation of the region's high humidity levels, reaching 86%. This consistent moisture in the air aligns with the trends seen in the preceding months, particularly from June through August, where humidity fluctuated around the same mark. As summer wanes and autumn approaches, the humidity remains relatively stable, only slightly easing in comparison to the year's earlier peak periods. The trend of high humidity throughout the year, peaking in October at 87%, suggests a maritime influence that keeps Dalkey wrapped in a blanket of moist air, most prevalent in late summer and early autumn. This climatic pattern not only shapes the local weather but also contributes to the lush greenery that defines this picturesque coastal town.
As we transition into September in Dalkey, Ireland, the UV Index shows a moderate level of 5, indicating a balance between sun exposure and safety. This marks a decrease from the peak levels of the summer months, where the index soared to an intense 8 in both June and July. Interestingly, as we move from the vibrant high of August back to September, burn times also adjust, remaining at 30 minutes, similar to those seen in April and March. This trend emphasizes the importance of remaining vigilant against sun damage, even as the summer warmth begins to wane. For more detailed information, check the Dalkey UV Index.
UV Risk Categories
In September, Dalkey, Ireland, basks in a delightful 308 hours of sunshine, marking a vibrant transition towards autumn. Following the peak summer months, where sunshine hours reached a high of 408 in May and maintained a robust level through the summer, September offers a gentle decline while still promising generous daylight. This trend highlights a consistent seasonal shift; as daylight diminishes gradually from the summer peak, it remains enjoyable enough to extend outdoor activities and leisurely strolls. With sunshine hours waning sharply in the subsequent months of October and November, September stands as a cherished bridge between vibrant summer days and the cozy embrace of fall.
In Dalkey, Ireland, September showcases a 23% chance of sunny weather, aligning with the overall trend of a gradual decline in sunshine as summer transitions into autumn. After a peak in early spring, where April boasts a substantial 49% likelihood of sun, the chances dwindle through the summer months of June and July. Notably, September mirrors the somewhat gloomy skies often associated with the preceding months, maintaining a consistent percentage comparable to February and October. The onset of fall typically ushers in cloudier days, making September a relatively modest month for sunshine seekers in this charming coastal town.
As summer gives way to autumn in Dalkey, Ireland, September brings a gentle transition in daylight, offering around 12 hours of sunlight. This marks a notable reduction from the 16 hours enjoyed in the peak months of June and July. The daylight begins to taper off following the vibrancy of May and June, where longer evenings basked the town in warmth. While the days are noticeably shorter than in the height of summer, September’s light still holds the charm of lingering evenings, setting the stage for the cozy atmosphere that autumn brings. The gradual decrease towards October signals the approaching winter months, where daylight dwindles further to just 10 hours. Overall, September serves as a beautiful bridge from the brightness of summer into the serene embrace of fall.
As September arrives in Dalkey, Ireland, the gentle breezes begin to transition after a summer of lighter winds. With an average speed of 4.3 m/s (10 mph), the winds are soft yet steady, marking a subtle shift from the calmer days of July and August. This mild windiness hints at the approaching autumn, where gusts will pick up in intensity, as seen in October's average of 6.7 m/s (15 mph). Notably, this month's figures show a gradual decline from the peak winds earlier in the year, with a notable reduction from February's 8.2 m/s. As nature prepares for the changing season, September's winds invite leisurely strolls along the coast, blending tranquility with a whisper of the briskness that lies ahead.
The weather in Dalkey 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 Dalkey and find detailed weather information for every month.
In September, the weather tends to be milder with average temperatures around 14°C (57°F) and highs reaching up to 20°C (68°F), while humidity is relatively high at 86%. The month sees more rainfall, accumulating 82 mm (3.2 in) over approximately 14 days. In contrast, January experiences cooler conditions, with average temperatures dropping to 7°C (44°F) and maximums around 13°C (56°F). Although precipitation is somewhat lower at 70 mm (2.7 in) over 11 days, the humidity remains similar at 85%. For a more detailed overview of January conditions, you can check out Dalkey weather in January.
September and February present distinct weather patterns, influencing both temperature and precipitation. In September, temperatures range from a minimum of 7°C (45°F) to a maximum of 20°C (68°F), with an average of 14°C (57°F). The month sees about 82 mm (3.2 in) of rainfall over approximately 14 days, while humidity remains relatively high at 86%. In contrast, February experiences cooler temperatures, with a minimum of 0°C (33°F), an average of 7°C (45°F), and a maximum of 13°C (56°F). Precipitation increases slightly to 86 mm (3.4 in) across around 15 days, but the humidity remains consistent at 86%. Overall, September tends to be milder and wetter than the chillier, albeit equally humid, February. For a closer look at February's specific conditions, check out Dalkey weather in February.
September and March exhibit distinct differences in weather patterns. September typically enjoys milder temperatures, with averages around 14°C (57°F) and maxima reaching 20°C (68°F), while March is cooler, averaging only 7°C (45°F) and peaking at 13°C (55°F). Both months see similar levels of humidity at 86%, but March has more chilly days with a minimum temperature plunging to -3°C (28°F). Precipitation is fairly comparable, with September receiving 82 mm (3.2 in) over 14 days, whereas March sees slightly more rainfall at 87 mm (3.4 in) across 15 days. For a more detailed look at March weather, check Dalkey weather in March.
September generally presents milder temperatures compared to April, with minimums around 7°C (45°F) and maximums reaching up to 20°C (68°F). In contrast, April experiences a cooler range, with minimum temperatures dipping to 2°C (35°F) and maximums only reaching 15°C (58°F). Furthermore, September tends to be wetter, receiving about 82 mm (3.2 in) of precipitation over 14 days, while April has less rain at 48 mm (1.9 in) across 11 days. Both months have similar humidity levels, with September at 86% and April at 85%. For more detailed information, check out Dalkey weather in April.
In comparing the weather between September and May, September appears to be slightly warmer with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 20°C (68°F), contrasted with May's cooler range of 3°C (38°F) to 17°C (63°F). Additionally, September experiences more precipitation, with 82 mm (3.2 in) across about 14 days, while May sees less rainfall at 61 mm (2.4 in) over approximately 12 days. Humidity levels are comparable, with September at 86% and May at 83%, making both months feel relatively moist. For more detailed information about May weather, you can visit Dalkey weather in May.
In comparing the weather of September to that of June, we see that the temperatures are quite similar, with September featuring an average temperature of 14°C (57°F) compared to June's 13°C (56°F). September boasts slightly warmer maximum temperatures, reaching up to 20°C (68°F), whereas June's highs peak at 19°C (67°F). Precipitation is a bit more intense in September, with 82 mm (3.2 in) over approximately 14 days, compared to June's 75 mm (2.9 in) over 13 days. Humidity levels are also comparable, with September at 86% and June at 85%. For more detailed information, you can explore Dalkey weather in June.
In comparing September and July weather, both months feature a maximum temperature cap of 20°C (68°F), but September exhibits a slight drop in average temperatures, with a minimum of 7°C (45°F) compared to July's minimum of 10°C (51°F). Humidity levels are consistent in both months at 86%, creating a similar feel in the air. While September receives slightly more precipitation at 82 mm (3.2 in) over 14 days, July's rainfall is close behind at 78 mm (3.1 in) for the same number of days. For a more detailed look at July's climate, check out Dalkey weather in July.
In comparing the weather of September to August, September brings slightly cooler temperatures, with a minimum of 7°C (45°F) compared to August's minimum of 10°C (51°F). Both months have a maximum temperature of 20°C (68°F), but September features a lower average temperature of 14°C (57°F), while August averages 15°C (60°F). Precipitation is also a factor; September sees 82 mm (3.2 in) over 14 days, while August has a bit more with 96 mm (3.8 in) across 16 days. Humidity is relatively consistent, hovering around 86% in September and 85% in August. For more detailed information, you can check out Dalkey weather in August.
In comparing September and October, we see a gradual decline in temperatures, with September's average sitting at 14°C (57°F) compared to October's 12°C (53°F). The minimum temperatures dip slightly from 7°C (45°F) in September to 5°C (41°F) in October, while maximum temperatures decrease from 20°C (68°F) to 18°C (64°F). Additionally, October experiences slightly increased precipitation, totaling 101 mm (4.0 in) over 16 days, compared to September's 82 mm (3.2 in) across 14 days. Humidity remains relatively consistent, with September at 86% and October just a bit higher at 87%. For a closer look at the specifics, check out Dalkey weather in October.
September and November present quite distinct weather patterns. In September, temperatures range from a minimum of 7°C (45°F) to a maximum of 20°C (68°F), with an average of 14°C (57°F). The month sees a moderate amount of precipitation totaling 82 mm (3.2 in) over approximately 14 days, alongside a relatively high humidity level of 86%. In contrast, November experiences cooler temperatures, with a minimum of 3°C (38°F) and an average of 9°C (49°F), peaking at 15°C (59°F). This month tends to be wetter, receiving 127 mm (5.0 in) of rain across about 17 days, while maintaining the same humidity level of 86%. For more detailed insights about November weather, visit Dalkey weather in November.
In September, temperatures in Dalkey typically range from a mild 7°C (45°F) at night to a comfortable maximum of 20°C (68°F) during the day, with an average of 14°C (57°F). The month sees about 82 mm (3.2 in) of rainfall spread over 14 days, accompanied by relatively high humidity at 86%.
In contrast, December brings cooler weather with temperatures dipping to a minimum of 2°C (35°F) and reaching a daytime high of 13°C (56°F), averaging around 8°C (46°F). This month experiences increased precipitation, totaling 110 mm (4.3 in) over 16 days, and slightly lower humidity at 84%. For more detailed insights into December conditions, visit Dalkey weather in December.
As September arrives in Dalkey, the weather begins to transition from the warmth of summer to the cooler embrace of autumn. Average temperatures hover around a comfortable 14°C, while maximums reach a pleasant 20°C, giving the month a recognizable crispness. However, you may also notice an uptick in precipitation, with about half the month marked by rainy days, resulting in a lush, vibrant landscape. The humidity remains relatively high at 86%, adding to the refreshing feel of the coastal breeze. This blend of moderate temperatures and frequent showers sets September apart, creating a unique atmosphere that invites both exploration and cozy indoor moments. To explore more about the distinctive climate of Dalkey, visit Dalkey Climate.