Killorglin Weather in September
With daytime temperatures of 18°C (64°F) and nighttime lows of 10°C (50°F), September in Killorglin brings moderate temperatures during the day. It is also the driest month of the year, with minimal rainfall.
Rainfall in Killorglin in September
The month is known for having the least rain of the year. Make the most of the sunshine and clear skies. Past climate data indicates that roughly 20 days will see rain, totalling around 99 mm (3.9 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Killorglin in September
September in Killorglin brings typical temperatures with highs around 18°C (64°F) and lows of 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights cool down to 10°C (50°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Killorglin in September
The area experiences a moderate amount of sunshine, with approximately 118 hours of sunlight expected. This means a decent mix of sun and overcast.If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Killorglin.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Killorglin's climate page.
Killorglin Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
18°C (64°F)
Chance of Rain
65%
Precipitation
99 mm (3.9 in)
Rainy days
20 days
Humidity
77% *
Sunshine
118 hours *
Percentage Sunshine
30% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Killorglin typically stay consistent throughout September, with daily highs averaging around 18°C (64°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 13°C (55°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Killorglin in September
Browse day-by-day weather records for Killorglin spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Killorglin historical weather extremes in September
Our historical data for Killorglin spans 1976 to 2025, revealing these weather extremes.
- The hottest September day on record in Killorglin reached 28°C (82°F) (September 5, 1991).
- The coldest September day was on September 20, 2018, with a maximum of 12°C (54°F).
- Killorglin registered its coldest September night on September 22, 2025, with temperatures dropping to 2°C (36°F).
Best Places in Ireland in September
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in September →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Killorglin in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Killorglin in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Killorglin's climate page.
Temperature Rainfall Sunshine Humidity
See the full Killorglin climate overview or explore weather in Ireland.
