Last updated: March 17, 2025
Cork, Ireland, in September offers a delightful blend of mild temperatures and refreshing conditions. With a maximum temperature reaching 24°C (76°F) and an average of 13°C (57°F), the early autumn welcomes visitors with pleasant weather. However, be prepared for some rain, as the city experiences about 69 mm (2.7 in) of precipitation over approximately 12 days, contributing to the lush greenery Cork is known for. The humidity levels hover around a notable 85%, ensuring that even the crisp air carries a hint of warmth. Whether you're exploring the city’s vibrant culture or enjoying the stunning landscapes, September in Cork delivers a unique and inviting atmosphere.
As September rolls in, Cork, Ireland, experiences a delightful transition into autumn. The temperatures show a gentle decline, with nighttime lows around 2°C (36°F), offering a crisp chill reminiscent of the changing season. However, the days are still pleasantly warm, boasting an average temperature of 13°C (57°F) and reaching up to 24°C (76°F) at their peak. This month's mild climate invites residents and visitors alike to enjoy the lingering warmth of summer, while the gradual cooling hints at the cozy months ahead. With the juxtaposition of cool mornings and balmy afternoons, September in Cork is a beautiful blend of seasons, perfect for exploring the city’s stunning landscapes and vibrant culture.
In September, Cork experiences a moderate level of precipitation, with a total of 69 mm (2.7 in) spread across approximately 12 days. This places it in the middle range compared to other months, slightly less than the wetter months of February and October but above the drier spells of January and June. The amount of rainfall signifies the transition into autumn, hinting at the beginning of the seasonal shift as cooler, wetter weather patterns set in. As summer fades away, September’s precipitation serves as a reminder of the lush green landscapes that Ireland is renowned for, paving the way for more dynamic weather in the months to come.
In Cork, Ireland, September marks a subtle peak in humidity, with levels reaching 85%. This figure aligns closely with the higher humidity experienced throughout the summer months, particularly in July and August, which also hover around 85%. As autumn approaches, the humidity begins to trend upwards slightly, leading into October's typical 86%. Throughout the year, humidity remains relatively consistent, fluctuating modestly between 83% and 86%. This stability not only characterizes Cork's temperate climate but also contributes to the lush, vibrant landscapes that the region is renowned for.
As September rolls into Cork, Ireland, the UV Index settles at a moderate level of 5, indicating it's time to enjoy the mild late-summer sun while remaining mindful of skin protection. This marks a soft decline from the previous months, where values peaked at 7 and 8 during the height of summer, forcing sun-lovers to limit their exposure to just 15 minutes. In September, you can bask in the sun for up to 30 minutes without risk of burning, making it an ideal time for outdoor activities. However, as autumn approaches, remember that even with a moderate UV Index, applying sunscreen is still essential for maintaining skin health. For more detailed insights, visit the Cork UV Index.
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As summer begins to fade, September in Cork, Ireland, offers a delightful transition from warmer days to the crispness of autumn. With 285 hours of sunshine, this month still holds onto a generous share of daylight, making it one of the brighter periods of the year, although it trails behind the high point of 381 hours in May. The gradual decrease from the summer peak is evident, yet September remains more radiant than the dreary winter months ahead, emphasizing a trend of declining sunlight as the year progresses. As the vibrant hues of fall begin to emerge, the lingering warmth of September sunshine provides a perfect backdrop for enjoying the city's enchanting landscapes and lively atmosphere.
As summer fades, the likelihood of sunny weather in September in Cork, Ireland tends to decline, with the chance of sun dropping to just 19%. This marks one of the lowest probabilities for sunny days throughout the year, following a slightly sunnier April (44%) and the more balanced months of late spring and early summer. The shift towards autumn sees cloudy skies becoming more prevalent, setting a tone for the transition into the cooler months ahead. While early fall may still hold some promise for occasional bursts of sunshine, the overall trend indicates that late summer joys are giving way to the brisk embrace of autumn.
As summer fades into autumn, September in Cork sees a gradual reduction in daylight hours, with an average of 12 hours of light. The month marks a transition, beginning with the lingering brightness of August, which boasts 14 hours of daylight, and shifting towards the shorter days of autumn, as October dips to 10 hours. This vibrant period follows a progressive increase in daylight from winter's 8 hours in January to summer's peak of 16 hours in both June and July. The ebbing light of September signifies the onset of cooler seasons, inviting a quiet reflection on the year’s shifting rhythms.
As September arrives in Cork, Ireland, the average wind speed gently nudges down to 3.1 m/s (7 mph), reflecting a subtle transition towards the cozy embrace of autumn. Following the slightly breezier summer months, where the winds danced at 2.9 m/s (6 mph) in July and a modest 3.3 m/s (7 mph) in August, September’s calmness suggests a period of stillness before the seasonal gusts increase again in October to 4.1 m/s (9 mph). This gradual decline in wind speed evokes a sense of tranquility often associated with early fall, hinting at shorter days and the warm hues of changing leaves, while simultaneously preparing the landscape for the more forceful breezes that characterize the colder months ahead.
The weather in Cork 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 Cork and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures typically range from a minimum of 2°C (36°F) to a pleasant maximum of 24°C (76°F), with an average of 13°C (57°F). Humidity is relatively high at 85%, and the month experiences 69 mm (2.7 in) of precipitation over 12 days. In contrast, January is much colder, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 13°C (56°F), and an average of 6°C (43°F). It has less precipitation at 55 mm (2.2 in) over 10 days, and humidity slightly decreases to 83%. For more detailed information on January weather, you can visit Cork weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of around 13°C (57°F). The month experiences moderate precipitation of 69 mm (2.7 in) over approximately 12 days, and humidity remains quite high at 85%. In contrast, February is significantly cooler, with temperatures ranging from -2°C (28°F) to a high of 13°C (56°F), and an average of 7°C (44°F). This month sees increased rainfall, totaling 101 mm (4.0 in) across about 15 days, while humidity remains consistent at 85%. For more details, check out Cork weather in February.
September and March present distinctly different weather patterns. In September, temperatures range from a comfortable 2°C (36°F) at night to a pleasant 24°C (76°F) during the day, with an average temperature of 13°C (57°F). The month experiences around 69 mm (2.7 in) of precipitation over approximately 12 days, accompanied by relatively high humidity levels of 85%. In contrast, March is cooler, with nighttime lows of -6°C (21°F) and daytime highs reaching only 16°C (61°F), averaging 7°C (44°F). March sees slightly higher precipitation at 83 mm (3.3 in) spread over 16 days and maintains a similar humidity level of 84%. For more detailed insights, you can check Cork weather in March.
In comparing the weather of September and April, we can see notable differences in both temperature and precipitation. September tends to be warmer, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), while April's temperatures are cooler, with a minimum of -2°C (29°F) and a maximum of 18°C (65°F). Both months experience a similar amount of precipitation, with September recording 69 mm (2.7 in) over 12 days and April slightly higher at 72 mm (2.8 in) over 11 days. Humidity levels remain relatively comparable, with September at 85% and April at 84%. For a closer look at the weather conditions during this month, you can check Cork weather in April.
When comparing the weather in September and May, we see some notable similarities and differences. September boasts a slightly higher overall temperature range, with minimums of 2°C (36°F), an average of 13°C (57°F), and maximums reaching up to 24°C (76°F). In contrast, May starts off a bit cooler, with minimum temperatures at 0°C (31°F), an average of 11°C (52°F), and maximums peaking at 23°C (74°F). Precipitation levels are fairly similar in both months, with September receiving 69 mm (2.7 in) of rain compared to May's 74 mm (2.9 in), both occurring over roughly 12 days. Humidity is also comparable, with September at 85% and May slightly lower at 84%. For more detailed information, you can check out Cork weather in May.
In comparing the weather of September and June, we find that September features slightly cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 24°C (76°F), while June sees milder conditions, ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F). Both months experience similar levels of humidity, around 85%, but September has a bit more precipitation at 69 mm (2.7 in) across 12 days, compared to June's 60 mm (2.4 in) over 11 days. Thus, while both months share common elements, June tends to be warmer and slightly drier. For more details, you can check Cork weather in June.
In comparing the weather of July and September, we see notable differences in temperature and precipitation patterns. July tends to be warmer, with minimum temperatures around 7°C (44°F) and maximums reaching up to 26°C (79°F), while September starts cooler, with a minimum of 2°C (36°F) and a maximum of 24°C (76°F). Both months experience similar humidity levels at 85% and have 12 days of precipitation; however, September has slightly more rainfall, totaling 69 mm (2.7 in) compared to July's 63 mm (2.5 in). For more detailed information about July weather specifically, you can check Cork weather in July.
In comparing the weather of September and August, we can note several key differences. September experiences cooler minimum temperatures, with lows averaging around 2°C (36°F) compared to August's minimum of 6°C (43°F). The average temperatures in both months are similar, with September slightly lower at 13°C (57°F) versus August's 15°C (60°F). Both months share the same maximum temperature of 24°C (75°F), indicating that the warmer days are consistent. However, September sees less precipitation overall at 69 mm (2.7 in) over 12 days, compared to August's 89 mm (3.5 in) across 15 days. Humidity remains relatively high in both months, with September at 85% and August slightly lower at 84%. For a deeper look at August's weather patterns, check out Cork weather in August.
In comparing the weather between September and October, we observe a notable drop in temperatures, with September averaging around 13°C (57°F) and October cooling down to an average of 11°C (52°F). The maximum temperatures also decrease, going from a pleasant 24°C (76°F) in September to a more subdued 18°C (64°F) in October. Additionally, while September receives about 69 mm (2.7 in) of precipitation over 12 days, October experiences a slight increase in rainfall to 95 mm (3.7 in) over 13 days. Humidity remains relatively consistent, hovering around 85% in September and slightly rising to 86% in October. For more detailed information, you can check the weather specifics here: Cork weather in October.
September's weather is generally milder, with average temperatures reaching up to 24°C (76°F), while November brings cooler conditions, with a maximum of only 15°C (59°F). The minimum temperatures also drop significantly, from September's 2°C (36°F) to November's chilly -1°C (30°F). Both months experience a similar level of precipitation, with September receiving 69 mm (2.7 in) over 12 days and November accumulating 79 mm (3.1 in) over 13 days. Humidity levels remain relatively high, with September at 85% and November slightly lower at 84%. For more details on the November climate, you can visit Cork weather in November.
In September, the weather tends to be milder with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F) and an average of 13°C (57°F). This month sees about 69 mm (2.7 in) of precipitation over 12 days, with humidity levels hovering around 85%. In contrast, December experiences colder conditions, with temperatures dipping to a minimum of -2°C (28°F) and peaking at 14°C (57°F), averaging at 7°C (45°F). Precipitation increases to 103 mm (4.1 in) over 16 days, accompanied by slightly lower humidity at 83%. Overall, December is marked by chillier weather and increased rainfall compared to the warmer and drier September. For those looking to understand the full extent of December weather, you can explore more at Cork weather in December.
As summer fades, September in Cork ushers in a noticeable shift in weather, marked by cooler temperatures and increased humidity. While the maximum daytime heat can still reach a pleasant 24°C, the average drops to a crisp 13°C, signaling the transition to autumn. Rainfall becomes more frequent, with 12 days seeing precipitation totaling 69 mm, contributing to the characteristic lushness of the landscape. This month stands apart from the drier, warmer months preceding it, offering a unique blend of mild days and crisp, refreshing evenings. To explore more about how Cork's weather shapes the year, check out Cork Climate.