September · Ireland
Best time to visit Dublin in September Weather, crowds & prices
Weather in Dublin in September
Average temperature 14°C, 108 mm of rain, about 5 days with 6+ hours of sunshine and 88% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.2/10
Ranked #6 of 12 months
- Avg temp
- 14°C
- Rainfall
- 108 mm
- Humidity
- 88%
- Days with 6h+ sun
- 5
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Dublin scores 6.2/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 14°C, 108 mm of rain, and roughly 5 days with 6+ hours of sunshine this month.
Georgian doors, pub sessions, and coastal cliffs feel finest May through September.
September in Dublin — middling scores, decent value
September averages 14°C (57°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 108 mm this is a genuinely wet month: about 5 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.2/10 here, 6th of 12 months, against 8.5/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Figure on mid-season pricing, with crowds are moderate.
Flexible dates? June scores 2.3 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Dublin in September?
- In September, Dublin averages 14°C, 108 mm of rain, and about 5 days with 6+ hours of sunshine. Its climate-comfort score is 6.2/10.
- Is September a good time to visit Dublin?
- September earns a 6.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Dublin in September?
- Expect about 108 mm of rain in September. Average humidity is 88% and there are about 5 days with 6+ hours of sunshine.
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