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Killarney weather in September 2026
Expect daytime maximum temperatures of 16°C in Killarney, Ireland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 117 mm of rainfall in the month.
- 16°C max day temperature
16 - 4 hours of sunshine per day
- 19 days with some rainfall
19 - 10°C min night temperature
10 - 13 hours of daylight per day
13 - No heat & humidity
0 - 117 mm of monthly rainfall
117 - 4 (Moderate) UV index
4
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Recommended for Ireland
The September weather guide for Ireland (Killarney) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Ireland
How warm is it in Killarney in September?
Daytime temperatures usually reach 17°C in Killarney in September, falling to 10°C at night.
How sunny is it in Killarney in September?
There are normally 4 hours of bright sunshine each day in Killarney in September - that's 33% of daylight hours.
How warm is the sea around Killarney in September?
The average sea temperature around Killarney in September is 14°C.
Does it rain in Killarney in September?
There are usually 15 days with some rain in Killarney in September and the average monthly rainfall is 64mm.
Killarney September sunrise & sunset times
Browse the sunrise and sunset times for Killarney in September 2026. Select a month to view Killarney sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 05:50 | 19:25 |
| Tuesday, 15th September 2026 | 06:12 | 18:53 |
| Wednesday, 30th September 2026 | 06:37 | 18:18 |
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