What to pack for Dublin in September
- long sleeves and a warm layer
- a medium jacket
- a compact umbrella or rain shell — rain is frequent
Humidity averages 82%; max daily wind around 21 km/h.
How September compares
Best months in Dublin: June–September. See the full best time to visit Dublin guide.
Dublin in September: the details
In September, Dublin sees average daytime highs of 17°C (63°F) and overnight lows of 11°C (51°F). Rainfall totals roughly 95 mm across 13.5 rainy days, and the sun shines about 8 hours per day with 12.4 hours of daylight mid-month. Relative humidity averages 82%.
In context: September is the 4th-warmest month and the second-wettest in Dublin. The sunniest month is June (10.9 h/day).
| Metric | September average |
|---|---|
| Daytime high | 17°C / 63°F |
| Overnight low | 11°C / 51°F |
| Rainfall | 95 mm over 13.5 rainy days |
| Sunshine | 8 h/day (12.4 h daylight) |
| Humidity | 82% |
| Travel score | 7.7 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Dublin, Ireland (53.33, -6.25) — see our methodology. Actual conditions vary year to year.
Not set on Dublin? Browse the best places to visit in September ranked by travel score.
Frequently asked questions
How hot is Dublin in September?
Daytime highs in Dublin in September average 17°C (63°F); nights drop to about 11°C.
Does it rain in Dublin in September?
Expect around 13.5 rainy days and 95 mm of rainfall in September.
Is September a good time to visit Dublin?
September is a good month to visit Dublin. Overall travel score: 7.7/10. The best months are June–September.
Also good in September, near Dublin
Where should you go next month?
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