In September, Ireland transitions from summer to autumn, experiencing mild temperatures, moderate rainfall, gentle winds, and decreasing daylight hours.
September in Ireland is generally mild, with average temperatures ranging from 10°C (50°F) to 17°C (63°F). Coastal areas, influenced by the Atlantic Ocean, tend to be milder, while inland regions may experience slightly cooler conditions.
Rainfall varies across Ireland in September. Eastern regions like Kilkenny receive about 69 mm (2.7 inches), making them relatively drier. In contrast, western areas such as Kincasslagh experience higher rainfall, averaging 144 mm (5.7 inches) during the month.
September experiences moderate winds, with average speeds around 25 km/h (15.5 mph). Coastal regions, especially along the west, may experience stronger gusts due to Atlantic weather systems.
Daylight decreases in September, with approximately 11 to 13 hours of light daily. The sun typically rises around 6:41 AM and sets near 8:14 PM at the beginning of the month, with daylight hours shortening as autumn approaches.
While both regions share similar climates, subtle differences exist:
In summary, while Ireland and Northern Ireland share comparable September weather patterns, Northern Ireland tends to be slightly cooler and wetter.