Killorglin
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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.

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% *
* Data from: Valentia, Ireland (37 KM, 23 Miles).

Killorglin Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Killorglin - and find the best time to visit.

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 records 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 2026, 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
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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 month

What To Do in Killorglin in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    6/10
  • Cycling
    6/10
  • Walking
    6/10
  • Camping
    8/10
  • Outdoor sports
    9/10

Killorglin 3-Day Forecast

More climate data for Killorglin

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.