Cork weather in September
September in Cork: nice, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Cork · #467 of 897 destinations to visit in September · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cork in September
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Cork climate normals — September
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Rainfall | 87 mm / 3.4 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 7.6 h/day | |
| Daylight | 12.6 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cork in September — FAQ
- Is September a good time to visit Cork?
- September in Cork: nice, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Cork on SeasonMap's comfort score (82/100).
- What is the weather like in Cork in September?
- In September, Cork averages a daily high of 17.5°C and a low of 12.4°C, with about 87.1 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Cork in September?
- Cork has a mean US Air Quality Index of about 35 in September.