What September feels like in Cork
Early autumn arrives in Cork with September. Expect cool, jacket-on afternoons — comfortable for a long walk. Little changes after sunset — nights are cool, only slightly below the daytime level. Moisture in the air gives the cold a damp edge.
Rain in Cork in September
Showers are a regular feature, arriving about one day in 3. A rainy day brings about 7.9 mm (0.3 in) on average — steady rain rather than a passing shower. Across the year Cork averages about 6.9 mm per rainy day, so September is typical.
Daylight and sunshine in September
On 15 September the sun rises at about 7:07 am and sets around 7:52 pm local time, giving 12 h 45 min of daylight. Compared with mid-August, the day has lost 1 h 59 min. Measured sunshine covers about 60% of the daylight — there are plenty of bright spells.
How September compares to the rest of the year
September is the 4th warmest month of the year in Cork. Compared with August, afternoons are 1.7°C (3.1°F) cooler, with 1 mm less rain. Temperatures keep falling into October. The next month's average high: 14°C (57.2°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: a good fit — good conditions for sitting outside.
- Beach: less ideal — the sea air is too cool.
Tips for visiting Cork in September
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Light Jacket
Bring a sweater or light coat for cool afternoons.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Cork in September?
Afternoons average 16.8°C (62.2°F) and nights about 11.2°C (52.2°F) — cool by most people's standards. It is the 4th warmest month of the year.
Does it rain a lot in Cork in September?
Yes, fairly — rain falls about one day in 3 and totals about 79 mm, so an umbrella is worth carrying.
What should I wear in Cork in September?
Pack rain protection, a light jacket and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is September or October better for visiting Cork?
September scores better on our climate ranking (#1 of 12 vs #6), rated Good against Good. October is cooler and has more rainy days.