Last updated: March 17, 2025
In September, Rosslare, Ireland, experiences a blend of mild temperatures and frequent rain, making it a month of transition. With a maximum temperature reaching up to 19°C (66°F) and an average hovering around 15°C (59°F), the weather remains comfortably cool. However, nights can be brisk, dipping to a minimum of 9°C (48°F). This month sees an average precipitation of 84 mm (3.3 in) over approximately 13 days, contributing to a high humidity level of 86%. Whether basking in the daytime warmth or enjoying the refreshing evening chill, September in Rosslare offers a captivating coastal experience rich in atmospheric variety.
In September, Rosslare, Ireland, ushers in a mild transition from the warmth of summer to the cooler embrace of autumn. With minimum temperatures around 9°C (48°F) and average highs reaching up to 19°C (66°F), the weather remains pleasantly temperate. This month marks a subtle shift, as average temperatures settle at 15°C (59°F), paving the way for crisp evenings. The consistent warmth from the preceding summer is still palpable, making it an ideal time for outdoor adventures and enjoying the scenic beauty of the Irish coastline before the chill of October sets in. As September unfolds, the gentle blend of summer's remnants with autumn's coolness presents a charming atmosphere for both locals and visitors alike.
September in Rosslare, Ireland, typically ushers in a transitional climate marked by moderate precipitation, contributing to a monthly total of 84 mm (3.3 in) over approximately 13 rainy days. This volume is slightly lower than August's substantial 89 mm (3.5 in), suggesting a gentle tapering of summer showers. As the month progresses, the trend points towards an increasing likelihood of rainfall, anticipating October's average spike to 118 mm (4.6 in). Overall, September exemplifies the shift from summer warmth to the onset of autumn, with its blend of comfortable temperatures and invigorating drizzles enriching the landscape.
As September rolls into Rosslare, Ireland, the humidity levels maintain a consistent rhythm, lingering around 86%. This marks a slight increase from the preceding months, where humidity fluctuated between 83% and 86%. Following the summer’s balmy embrace, autumn begins to assert itself, yet the air remains notably moist, echoing the patterns seen throughout the year. Interestingly, September's humidity aligns perfectly with July's peak, suggesting that the transition into fall does not necessarily lead to a significant drop in moisture levels. As the year progresses, the average humidity subtly climbs again into the cooler months, with October reaching 87%, creating a perpetual sense of humidity that characterizes Rosslare’s coastal climate.
As September rolls into Rosslare, Ireland, the UV Index shows a moderate level of 5, encouraging outdoor enthusiasts to enjoy the pleasant weather while taking care against sun exposure. This marks a transition from the high levels experienced during the summer months, specifically from the 7 noted in August and the 8 seen in both June and July. With a burn time of 30 minutes, it's advisable to use sun protection, especially during midday. As the days grow shorter and temperatures begin to dip, September serves as a gentle reminder that even as we shift into autumn, the sun still requires our attention. For more detailed information, check out the Rosslare UV Index.
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September in Rosslare, Ireland, embraces a gentle transition from the sun-soaked summer months to the cooler embrace of autumn, with 317 hours of sunshine gracing the skies. This noteworthy amount of sunshine follows a peak in July, where basking in 420 hours made it a standout in the year. As September rolls in, it retains a commendable brightness that bridges the vibrant summer of May and June, where sunshine reached 411 and 412 hours, respectively. However, as the days shorten and autumn approaches, the sun begins to retreat, setting the stage for the softer light of October and November. This gradual decline suggests a rhythmic dance of seasons, with September displaying a rich reservoir of daylight before winter's cocoon gently envelops Rosslare.
In Rosslare, Ireland, September experiences a 26% chance of sunny weather, which is notably lower than the spring and summer months. As the year transitions from the warmth of August, with a 34% chance of sunshine, the likelihood of clear skies begins to diminish. This trend reflects a gradual decline from the peak sunshine periods of April's 51% and May's 39%, making September a time when overcast conditions become increasingly prevalent. While this month doesn't boast the sunniest days, it still serves as a gentle bridge into the autumn season, allowing for occasional bright spells amid the encroaching clouds.
As summer gracefully transitions into autumn, September in Rosslare, Ireland, offers a delightful compromise with 12 hours of daylight. Following the sun-soaked months of June and July, which basked in 16 hours of sunlight, September marks a gentle decline. The daylight hours decrease further from the robust 15 hours in May and 14 hours in August, hinting at the shorter days ahead. This seasonal shift not only showcases the natural ebb and flow of daylight but also invites locals and visitors alike to savor the mild, sunlit days before the descent into winter, where daylight dips to a mere 7 hours in December.
As summer gives way to autumn, the September wind in Rosslare, Ireland ushers in a gentle breeze, averaging about 5.1 m/s (11 mph). This marks a noticeable decline from the warmer months, where wind speeds peaked in late spring and summer. August's winds clocked in at 5.7 m/s (13 mph), while the playful gusts of July dropped to their lowest at 4.3 m/s (10 mph). As the year progresses, October sees a resurgence in wind strength, bouncing back to 7.7 m/s (17 mph), hinting at a dramatic shift in the seasonal winds. This trend reflects a distinct rhythm in Rosslare's climate, where each month paints a different picture of nature's breath, transitioning gracefully from the warmth of summer to the crispness of fall.
The weather in Rosslare 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 Rosslare and find detailed weather information for every month.
September and January exhibit notable contrasts in weather conditions. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), with an average temperature of 15°C (59°F). This month also brings ample rainfall, totaling 84 mm (3.3 inches) over 13 days, accompanied by a high humidity level of 86%. In contrast, January presents cooler weather, with temperatures dipping to a minimum of 2°C (35°F) and peaking at 13°C (56°F), averaging 8°C (46°F). Precipitation is less pronounced in January, accumulating to 66 mm (2.6 inches) also over 13 days, while humidity remains slightly lower at 85%. For more detailed information, you can check Rosslare weather in January.
September and February present contrasting seasonal weather patterns. In September, temperatures average around 15°C (59°F), with a mild minimum of 9°C (48°F) and a maximum of 19°C (66°F). The month sees a total precipitation of 84 mm (3.3 in) spread over 13 days, while humidity remains high at 86%. In contrast, February experiences cooler temperatures, with an average of 8°C (46°F), minimums dipping to 2°C (35°F) and maximums reaching 12°C (55°F). This month is slightly wetter, with precipitation totaling 103 mm (4.1 in) across 16 days, maintaining the same high humidity level of 86%. For more detailed insights, you can check Rosslare weather in February.
September and March present contrasting weather patterns, characterized by differing temperatures and precipitation levels. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), with an average of 15°C (59°F), while March is notably cooler, with temperatures dipping as low as -1°C (30°F) and peaking at 12°C (53°F), averaging just 8°C (47°F). Both months experience significant rainfall, with September recording 84 mm (3.3 in) over 13 days and March slightly higher at 88 mm (3.5 in) over 15 days. Interestingly, humidity remains constant at 86% in both months, providing a damp feel regardless of the season. For more detailed information, check out Rosslare weather in March.
When comparing the weather in September and April, we see a significant difference in temperatures as September enjoys milder conditions with average temperatures around 15°C (59°F), while April sees cooler averages of only 9°C (48°F). September also boasts higher maximum temperatures, reaching up to 19°C (66°F), compared to April's peak of 13°C (55°F). Additionally, September experiences more precipitation, with 84 mm (3.3 in) over 13 days, while April receives 60 mm (2.4 in) spread over just 8 days. Humidity levels are quite similar, with September at 86% and April slightly lower at 85%. For a closer look at April weather specifically, you can visit Rosslare weather in April.
When comparing the weather in September to that of May, we see notable differences in temperature and precipitation. September tends to be warmer, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), while May has a slightly cooler average, with temperatures ranging from 5°C (41°F) to a maximum of 15°C (60°F). Additionally, September experiences higher precipitation levels, with 84 mm (3.3 in) over 13 days, compared to May’s 57 mm (2.3 in) over 9 days. With an average humidity of 86% in September, it’s also a bit more humid than May, which has a humidity level of 83%. For a closer look at May's weather specifics, you can check Rosslare weather in May.
In comparing the weather between September and June, we find some interesting similarities and differences. Both months experience similar maximum temperatures, reaching up to 19°C (66°F), but September features a slightly higher average temperature of 15°C (59°F) compared to June's 14°C (57°F). Precipitation levels are also slightly higher in September, with 84 mm (3.3 in) spread over 13 days, while June sees 70 mm (2.8 in) over 11 days. Humidity is comparable, with September at 86% and June at 85%. Overall, September tends to be a bit wetter but remains comfortable in terms of temperature. For more detailed insights, you can check out Rosslare weather in June.
In comparing the weather of September and July, we find that both months share a similar average temperature of around 15°C (59°F), with maximum temperatures reaching 19°C (66°F). However, September tends to be slightly cooler at its minimum, with lows of 9°C (48°F), compared to July's 11°C (52°F). Additionally, September experiences more rainfall, with 84 mm (3.3 in) over 13 days, whereas July sees less precipitation at 62 mm (2.4 in) over 11 days. Despite these differences, both months maintain the same humidity level of 86%, contributing to the overall mild feel throughout the summer and early autumn. For more specific details on July's weather, you can check out Rosslare weather in July.
In comparing the weather between September and August, we observe slight variations in temperature and precipitation. September tends to be cooler, with minimum temperatures dropping to 9°C (48°F) and an average of 15°C (59°F), while August starts off warmer with a minimum of 11°C (52°F) and an average of 16°C (60°F). Both months experience similar maximum temperatures of 19°C (66°F). In terms of rainfall, September records 84 mm (3.3 in) spread over 13 days, slightly less than August's 89 mm (3.5 in) over 11 days. Humidity remains high in both months, with September at 86% and August at 85%. For more detailed insights, you can explore Rosslare weather in August.
In September, the weather features mild temperatures with a minimum of 9°C (48°F) and an average of 15°C (59°F), peaking at 19°C (66°F). However, it also experiences considerable precipitation, totaling 84 mm (3.3 in) over 13 days, coupled with high humidity levels of 86%. In contrast, October introduces slightly cooler conditions, with temperatures ranging from a minimum of 6°C (43°F) to an average of 13°C (55°F) and a maximum of 18°C (65°F). The month sees an increase in precipitation to 118 mm (4.6 in), spread over 16 days, and the humidity remains consistently high at 87%. For more detailed information on weather patterns, you can check Rosslare weather in October.
September and November weather displays notable differences. September boasts milder temperatures, with a minimum of 9°C (48°F) and an average of 15°C (59°F), reaching a maximum of 19°C (66°F). In contrast, November sees a drop in temperature, with a minimum of 4°C (40°F) and an average of 10°C (51°F), peaking at 15°C (60°F). Precipitation also increases in November, totaling 139 mm (5.5 in) over 18 days, compared to September's 84 mm (3.3 in) spread over 13 days. Despite similar humidity levels of 86%, November's chill and increased rainfall make it feel considerably less inviting. For more detailed information, you can check Rosslare weather in November.
In September, the weather is moderate with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), averaging around 15°C (59°F). With an average precipitation of 84 mm (3.3 in) over 13 days, it brings a humid atmosphere at 86%. In contrast, December sees cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 13°C (56°F), resulting in an average of 9°C (48°F). The month is wetter, with 131 mm (5.1 in) of precipitation spread over 17 days, and the humidity slightly decreases to 84%. For more detailed information, you can check Rosslare weather in December.
As September unfolds in Rosslare, the weather begins to shift, bringing a blend of mild temperatures and increased humidity. With average highs around 15°C, this month serves as a gentle transition from the warmth of summer. However, the frequent rain—over a third of the month experiencing precipitation—adds an element of unpredictability, contrasting sharply with the drier summer months. Visitors can expect a cooler breeze accompanied by lush landscapes, making it a unique and refreshing time to experience the beauty of Rosslare. For a deeper dive into how weather patterns evolve throughout the year, explore Rosslare Climate.