Dublin Weather in September
In September, Dublin averages a high of 17°C (63°F) and a low of 9°C (49°F), based on 55 years of historical weather data from DUBLIN PHOENIX PARK.
17°C
Average high
63°F
9°C
Average low
49°F
28°C
Record high
83°F · 2023
-1°C
Record low
30°F · 2024
What to Expect in Dublin in September
Typical September days in Dublin reach 17°C (63°F) during the afternoon and cool to around 9°C (49°F) overnight. On average, measurable rain falls on about 57% of days this month. Over the past 55 years, September temperatures in Dublin have ranged from a record high of 28°C (2023) down to a record low of -1°C (2024).
For a day-by-day look or other months, see the full Dublin weather history.