Dublin in September
Festival season
By Daan · Last reviewed October 2026
The short answer
September is one of the best months to visit Dublin.
September is mild, with the Dublin Fringe Festival and the start of the theater season.
September in detail
What September actually feels like
- Weather
- 10–17°C
- Mild and changeable.
- Crowds
- Moderate–High
- Busy.
- Prices
- €€€
- Mid-to-high rates.
+Fringe and theater festivals.
–Weather turns.
My tip for September
Book Fringe shows early in the month.
- Theater
- Food
How September compares
Against the other eleven months
3rd of 12 overall in Dublin, 4th for weather, 8th for space, 8th for value. The emptiest month is January; the best value is January.
See all twelve months for DublinNot set on September?
Even stronger months in Dublin
Also good in September
Weather
Weather in Dublin in September
In September Dublin averages a high of 17°C (63°F) and a low of 10°C (50°F), with about 63 mm of rain or snow over 11 wet days. The warmest month is July (around 20°C) and the coolest is January (around 8°C); the wettest month is November.
- Average high
- 17°C
- 63°F
- Average low
- 10°C
- 50°F
- Precipitation
- 63 mm
- Wet days
- 11
Climate data: Met Éireann (Dublin Airport, 1991–2020). Temperatures are averages of daily highs and lows.
Quick answers
Dublin in September: the questions people ask
- Is September a good time to visit Dublin?
- September is one of the best months to visit Dublin. It ranks 3 of 12 months in Dublin overall (4 for weather, 8 for space, 8 for value). The main upside: Fringe and theater festivals. The main downside: Weather turns.
- What is the weather like in Dublin in September?
- Average highs are around 17°C and lows around 10°C. Expect about 63 mm of rain or snow over roughly 11 wet days. Mild and changeable. For comparison, the warmest month is July (around 20°C) and the coolest is January (around 8°C).
- Is Dublin crowded in September?
- Crowds are moderate–high. Busy. The quietest month is January.
- How expensive is Dublin in September?
- Prices are at level 3 of 5 (€€€). Mid-to-high rates. The best-value month is January.
- When is the best time to visit Dublin?
- In the CrowdFreeViews month scores, May is the best month overall (September ranks 3 of 12). The quietest month is January and the best value is January.