Dublin Weather in September
17.7°C high · 9.3°C low · 61 mm rain · 4.5h sun
Sep is a warm month in Dublin — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 17.7°C |
| Average low | 9.3°C |
| Rainfall | 61 mm |
| Sunshine | 4.5 hours/day |
| Daylight | 12.4 hours |
What to pack in September
Pack a jacket and layers for Dublin in September.
Dublin weather by month
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Frequently asked questions
What is the weather in Dublin in September?
Highs of 17.7°C and lows of 9.3°C, with about 61 mm of rain and 4.5 hours of sunshine per day.
Is September a good time to visit Dublin?
Sep is a warm month in Dublin — not peak season, but a good time to avoid crowds.
What to do in Dublin · Best time to visit Dublin
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.