When to go · Dún Laoghaire
Dún Laoghaire in September
Great month. Inside Dún Laoghaire's best window: May–Sep.
Key facts
- Verdict
- Great
- Temperature
- 18°C (64°F)64°F (18°C) / 11°C (52°F)52°F (11°C)
- average high / low
- Rain days
- 10
- Crowds
- Medium
- Ireland overall
- Prices
- Medium
- Ireland overall
Verdict
Inside Dún Laoghaire's best window: May–Sep.
Is another month better than September?
No other month rates higher than September for Dún Laoghaire in this guide.
Weather in September
- Dún LaoghaireHighs around 18 °C (64 °F), lows around 11 °C (52 °F), rain on about 10 daysHighs around 64 °F (18 °C), lows around 52 °F (11 °C), rain on about 10 days
Crowds and prices
- Crowds · Ireland overall
- Medium
- Prices · Ireland overall
- Medium
Ireland overall: Schools back, sea at its warmest, often settled weather: a strong month for driving the coast.
Compare two months
Weather, crowds and prices for any two months in Dún Laoghaire, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 18 °C (64 °F)64 °F (18 °C)
May: 16 °C (61 °F)61 °F (16 °C)
Night low
Sep: 11 °C (52 °F)52 °F (11 °C)
May: 8 °C (46 °F)46 °F (8 °C)
Rain days
Sep: 10
May: 10
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 0
May: 0
September: Inside Dún Laoghaire's best window: May–Sep.
May: Inside Dún Laoghaire's best window: May–Sep.
Dún Laoghaire: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast