Last updated: March 17, 2025
September in Sligo, Ireland, presents a climate marked by a dynamic range of temperatures and notable precipitation. The maximum temperature can reach a pleasant 24°C (76°F), offering a brief glimpse of summer's warmth, while the average temperature settles around 13°C (55°F), providing a crisp and refreshing atmosphere. However, with minimum temperatures dropping to 2°C (36°F), visitors should prepare for brisk evenings. The month sees about 106 mm (4.2 in) of rain over 18 days, contributing to Sligo's lush landscapes, while an 87% humidity level ensures a moist, invigorating ambiance. Whether exploring scenic coastlines or quaint villages, September's weather invites adventure, albeit with a chance of rain.
In September, Sligo, Ireland starts to transition into the cooler autumn months, with temperatures reflecting this shift. The month sees a minimum of 2°C (36°F)—a noticeable drop from the warmth of July and August—but with a comfortable average of 13°C (55°F). The maximum temperature reaches a pleasant 24°C (76°F), offering a final taste of summer warmth before the chill sets in. This blend of cooler nights and mild, sunlit days invites both locals and visitors to enjoy the breathtaking landscapes and outdoor activities, making September a vibrant time to experience the rich beauty of Sligo as it prepares for the coming season.
In September, Sligo experiences a notable transition as summer wanes and autumn begins to take hold, reflected in the precipitation amount of 106 mm (4.2 in), accompanied by 18 rainy days. This marks a decrease from the 158 mm (6.2 in) recorded in the wetter August but still underscores the region's consistently moist climate. The overall pattern of precipitation during this time hints at an expected increase in rainfall into the autumn months, with October typically maintaining similar levels at 131 mm (5.2 in). As the clouds gather more frequently, the rhythmic pitter-patter of rain becomes a defining feature of the landscape, nurturing the lush greenery that Ireland is renowned for.
In September, Sligo, Ireland experiences a notable rise in humidity, reaching 87%—the highest point so far this year. This increase aligns with the trend observed over the summer months, where July and August also reported elevated humidity levels of 86%. As autumn approaches, humidity remains elevated, gradually ascending from 84% in April to 88% in November. This consistent moisture in the air contributes to Sligo's lush landscapes and vibrant scenery, creating a captivating environment that transitions from the warmer summer months into the cooler fall season. The rich humidity not only heightens the ambiance but also sets the stage for the dramatic changes that the coming months will bring.
As we transition into September, Sligo experiences a UV Index of 5, indicating a moderate exposure category. This means that while the risk of harm from unprotected sun exposure is higher than during the winter months, it remains manageable with proper precautions. Burn time increases to 30 minutes, allowing for more leisurely outdoor activities, but it’s still wise to be cautious, especially during midday when the sun is strongest. Compared to the peak summer months of June and July, where the UV Index soared to 8 and required extra vigilance, September signals a gradual cooling off. Thus, enjoying the pleasant early autumn days in Sligo is still safe, as long as you stay aware of the sun's intensity. For more detailed insights, check Sligo UV Index.
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In Sligo, Ireland, the month of September offers a delightful farewell to summer, basking in an impressive 257 hours of sunshine. As the days shorten, this vibrant city transitions from the peak brightness of May, which boasts a sun-soaked 365 hours, into the softer golden hues of autumn. The sunshine steadily declines from the summer months of July and August, each offering a formidable 336 and 287 hours respectively, but September still holds its charm, glowing with nearly 75% of May's brightness. As autumn arrives, the diminishing light serves as a gentle reminder of the changing seasons, with October's 202 hours promising a cozy embrace as nature prepares for winter's approach.
September in Sligo, Ireland, marks a subtle transition into the crisper days of autumn, and the likelihood of sunny weather reflects this shift. With a chance of sun at just 14%, the month trails behind the sunnier spring months of April and May, which boast probabilities of 36% and 33% respectively. This decline in sunshine is characteristic of late summer, as daylight wanes and cloud cover often increases. Although September isn't the sunniest month on the calendar, its modest forecast still invites the occasional burst of sunlight, offering opportunities to enjoy the area's scenic beauty before the chill of October sets in.
As summer fades, September in Sligo, Ireland, ushers in a noticeable shift in daylight, offering about 12 hours of sunlight each day. This transition reflects a gentle decline from the long, sun-drenched days of June and July, which boast up to 17 hours of brightness. While September's daylight duration remains significantly longer than the winter months, it signals the approach of autumn as the days gradually shorten, leading to October's 10 hours. The evolution of daylight through the year showcases nature’s rhythm, inviting residents and visitors alike to savor the lingering warmth of early autumn before the days grow shorter and the evenings embrace the cozy embrace of early nightfall.
As September unfolds in Sligo, Ireland, the wind whispers a gentle lullaby, with an average speed of 3.2 m/s (7 mph). This crisp air marks a transition from the higher gusts of late summer, particularly July, which recorded the lowest winds at just 2.4 m/s (5 mph). Moving into autumn, September's breeze feels like a warm embrace, slightly stronger than August's 3.1 m/s (7 mph), yet still calm compared to the gustier months ahead. The trend of tranquil winds continues into October and November, where average speeds rise gradually, hinting at the impending winter chill. Overall, September's winds offer a serene prelude to the seasonal shifts, inviting residents and visitors alike to revel in the tranquil beauty of Sligo’s landscapes.
The weather in Sligo 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 Sligo and find detailed weather information for every month.
September and January present quite contrasting weather conditions. In September, temperatures range from a mild 2°C (36°F) at night to a pleasant 24°C (76°F) during the day, with an average of 13°C (55°F). The month experiences significant rainfall, totaling 106 mm (4.2 in) spread over 18 days, coupled with high humidity levels at 87%. In contrast, January offers colder temperatures, with nighttime lows dipping to -3°C (27°F) and daytime highs reaching only 14°C (57°F), averaging around 6°C (42°F). This month sees slightly less precipitation at 88 mm (3.4 in), falling over 15 days, and a slightly lower humidity level of 84%. For more details on January weather, you can explore this link: Sligo weather in January.
September and February present contrasting weather patterns in terms of temperature and precipitation. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of 13°C (55°F). The month is relatively wet, receiving 106 mm (4.2 in) of precipitation over 18 days, and the humidity is high at 87%. In contrast, February sees cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 15°C (59°F), leading to an average of just 6°C (43°F). Although February experiences slightly more precipitation at 131 mm (5.2 in) across 17 days, it maintains a lower humidity level of 84%. For more details, check out Sligo weather in February.
In comparing the weather of September and March, notable differences can be observed. September typically boasts milder temperatures, with a minimum of 2°C (36°F) and an average of 13°C (55°F), reaching up to a maximum of 24°C (76°F). In contrast, March experiences cooler beginnings, with lows dipping to -4°C (24°F) and an average of only 6°C (44°F), peaking at 17°C (63°F). Both months see significant precipitation, with September receiving 106 mm (4.2 inches) and March slightly higher at 119 mm (4.7 inches), although both have precipitation on roughly 18 days. Humidity levels are relatively high in both months, with September at 87% and March slightly lower at 83%. For more detailed insights into March weather, you can visit this link: Sligo weather in March.
September and April exhibit notable differences in weather patterns. September typically welcomes a milder climate, 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 (55°F). It also sees more rainfall, accumulating about 106 mm (4.2 inches) over 18 days, along with a higher humidity level of 87%. In contrast, April experiences cooler temperatures, with lows sinking to -2°C (29°F) and highs peaking at 21°C (70°F), averaging around 9°C (48°F). Precipitation is less frequent, totaling 65 mm (2.6 inches) over 13 days, accompanied by a slightly lower humidity of 84%. For a closer look at April's weather specifics, you can visit Sligo weather in April.
September and May present contrasting weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of 13°C (55°F). This month experiences higher humidity levels at 87% and more precipitation, totaling 106 mm (4.2 in) over 18 days. In contrast, May sees a slightly chillier minimum temperature of -1°C (31°F) and an average of 11°C (53°F), with a maximum reaching 25°C (77°F). Additionally, May has less precipitation at 86 mm (3.4 in) over 15 days and a lower humidity level of 83%. For more detailed information on May's weather, visit Sligo weather in May.
In comparing the weather of September and June, we can observe notable differences in temperature and precipitation. September experiences a minimum temperature of 2°C (36°F) and can reach a maximum of 24°C (76°F), with an average temperature of 13°C (55°F). In contrast, June starts slightly warmer with a minimum of 5°C (41°F) and peaks at 29°C (84°F), maintaining the same average of 13°C (57°F) as September. Regarding precipitation, September sees a total of 106 mm (4.2 in) over 18 days, while June has a slightly higher precipitation of 117 mm (4.6 in) over 17 days. Humidity levels are also comparable, with September at 87% and June at 83%. For a more detailed look at June weather, you can visit Sligo weather in June.
When comparing the weather in September and July, we see several notable differences. September tends to have a wider temperature range with a minimum of 2°C (36°F) and a maximum of 24°C (76°F), while July enjoys milder temperatures with a minimum of 8°C (46°F) and a maximum of 28°C (83°F). Additionally, September experiences slightly more precipitation, measuring 106 mm (4.2 in) over 18 days, compared to July's 109 mm (4.3 in) over just 16 days. Interestingly, humidity levels are quite similar, with September at 87% and July at 86%. Overall, July typically offers warmer and drier weather compared to the cooler and more variable conditions of September. For more details on July's weather specifics, check out Sligo weather in July.
In September, the weather shows a slight cooling trend compared to August, with a minimum temperature of 2°C (36°F) and an average of 13°C (55°F), while August remains warmer with a minimum of 6°C (43°F) and an average of 15°C (59°F). Both months share a maximum temperature of 24°C (75°F/76°F), but September experiences more rain with 106 mm (4.2 in) falling over 18 days, compared to August's 158 mm (6.2 in) over 22 days. Humidity levels are similar, with September slightly higher at 87% compared to August's 86%. This indicates that while temperatures remain fairly consistent, September's weather may feel a bit more damp and cooler. For more detailed insights, check out Sligo weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of 13°C (55°F). The month experiences about 106 mm (4.2 in) of precipitation over 18 days, and humidity remains high at 87%. In contrast, October brings cooler temperatures, with a minimum of 0°C (32°F), an average of 10°C (51°F), and a maximum of 20°C (68°F). This month sees increased precipitation, totaling 131 mm (5.2 in) over 20 days, while humidity remains steady at 87%. For more details on October weather, check out Sligo weather in October.
September and November exhibit notable differences in weather patterns. September tends to be warmer, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), resulting in an average of 13°C (55°F). In contrast, November sees cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 15°C (59°F), averaging around 8°C (46°F). While both months experience significant precipitation, September receives 106 mm (4.2 in) over 18 days, and November has slightly higher precipitation at 115 mm (4.5 in) over 19 days. Humidity remains high in both months, with November only slightly edging out at 88% compared to September's 87%. For more specific weather information, you can refer to Sligo weather in November.
In September, temperatures are generally milder, with a minimum of 2°C (36°F) and reaching a maximum of 24°C (76°F), offering an average of 13°C (55°F). This month experiences considerable rainfall, with precipitation recorded on 18 days amounting to 106 mm (4.2 in) and high humidity levels at 87%. In contrast, December sees cooler temperatures, with a minimum of -2°C (29°F), an average of 6°C (44°F), and a maximum of 13°C (55°F). The precipitation level slightly increases to 119 mm (4.7 in) over 20 days, accompanied by slightly lower humidity at 84%. For more insights about December weather, check out Sligo weather in December.
As September unfolds in Sligo, the weather begins to shift, ushering in a blend of mild temperatures and increased rainfall. While warmer days might still linger, the crispness of autumn starts to take hold, with a noticeable drop in temperatures compared to the balmy summer months. The average temperature hovers around a comfortable 13°C, but it's not uncommon to experience chillier nights as the season transitions. With 18 days of rain and humidity levels peaking at 87%, September is characterized by its wet and changeable conditions. Overall, this month serves as a bridge between summer's warmth and autumn's embrace, creating a unique atmospheric charm that beckons visitors to experience the rich beauty of Sligo. For a deeper understanding of what to expect throughout the year, be sure to check out Sligo Climate.