Dublin weather in September
Dublin in September averages 13°C (56°F), 61 mm of rain and 4.4 hours of sun a day.
Of the twelve months in Dublin, September is the fourth warmest, the fifth driest and the sixth sunniest.
- Average temp
- 13°C (56°F)
9–17°C · 48–63°F
- Rainfall
- 61 mm
Showers likely
- Sunshine
- 4.4 h
hours per day
- Wind
- 19 km/h
What is Dublin like in September?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Dublin in September?
A light rain jacket
About 61 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 9°C (48°F).
September compared with August and October
September in Dublin is 2°C cooler than August and 12 mm drier than it, which averages 15°C (59°F).
September in Dublin is 2.8°C warmer than October and 17 mm drier than it, which averages 10°C (51°F).
Daylight in Dublin in September
On 15 September the sun is up for 12 hours 40 minutes in Dublin, rising about 06:59 and setting about 19:39 local time.
September ends 2 hours shorter than it begins, so the last week of the month is a different length of day from the first.
That is 4 hours 19 minutes short of June, the longest-lit month here.
Where to stay in Dublin
Dates are a starting point for September.
Travel guides for Dublin
What to read before you book.
Dublin weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 5°C / 42°F | 62 mm |
| February | 5°C / 42°F | 52 mm |
| March | 7°C / 44°F | 52 mm |
| April | 8°C / 47°F | 55 mm |
| May | 11°C / 51°F | 58 mm |
| June | 14°C / 56°F | 65 mm |
| July | 15°C / 60°F | 62 mm |
| August | 15°C / 59°F | 74 mm |
| September | 13°C / 56°F | 61 mm |
| October | 10°C / 51°F | 78 mm |
| November | 7°C / 45°F | 83 mm |
| December | 6°C / 42°F | 72 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Dublin in September
September climate averages for Dublin, 1991–2020.
Dublin averages 13°C (56°F) in September, ranging from about 9°C (48°F) at night to 17°C (63°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 61 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 13°C (56°F) against 10°C (51°F) in October — 2.8°C warmer.
September is 2°C cooler than August, and 12 mm drier.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 4.4 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 40 minutes of daylight in mid-September, against 16 hours 59 minutes in June and 7 hours 32 minutes in December.
On 15 September, sunrise is about 06:59 and sunset about 19:39 local time. Both shift across the month — the month ends 2 hours shorter than it starts.
