Capital city in County Dublin, Ireland

Dublin weather by month and the best time to visit

Updated October 2026Sources

May–Jul, SepBest time to visit

When to go to Dublin

May–September is mildest with long light. St Patrick's weekend (mid-March) and summer weekends fill hotels; winters are dark, wet and windy.

Dublin weather by month

Average daily high, rainfall and conditions.

Jan8°86 mm
Feb8°70 mm
Mar9°70 mm
Apr11°61 mm
May14°67 mm
Jun17°76 mm
Jul18°80 mm
Aug18°91 mm
Sep16°76 mm
Oct14°102 mm
Nov10°106 mm
Dec8°97 mm

PleasantHotRainyCool or coldBest months

Average highAverage lowRainfall

Monthly averages

Month	High	Low	Rain	Humidity	Conditions
January	8°C46°F	4°C40°F	86 mm	91%	Cold
February	8°C46°F	4°C39°F	70 mm	90%	Cold
March	9°C48°F	4°C40°F	70 mm	88%	Cold
April	11°C52°F	6°C43°F	61 mm	86%	Cool
May	14°C57°F	8°C47°F	67 mm	84%	Cool
June	17°C62°F	11°C52°F	76 mm	84%	Cool
July	18°C65°F	12°C54°F	80 mm	85%	Pleasant
August	18°C64°F	12°C54°F	91 mm	86%	Cool
September	16°C61°F	11°C52°F	76 mm	87%	Cool
October	14°C56°F	9°C49°F	102 mm	88%	Cool
November	10°C51°F	7°C44°F	106 mm	90%	Cold
December	8°C47°F	5°C41°F	97 mm	91%	Cold

Best months across Ireland

Place	Best months	Warmest month
Dublin	May–Jul, Sep	Jul (18°C)
Galway	May–Jul, Sep	Jul (20°C)
Cork	May–Jul, Sep	Jul (19°C)
Killarney	May–Jun, Sep	Jul (19°C)
Dingle	May–Jun, Sep	Jul (17°C)
Kilkenny	May–Jul, Sep	Jul (20°C)
Limerick	May–Jul, Sep	Jul (19°C)

Quick answers

What is the best month to visit Dublin?

May–Jul, Sep. May–September is mildest with long light. St Patrick's weekend (mid-March) and summer weekends fill hotels; winters are dark, wet and windy.

When is the rainy season in Dublin?

Rain peaks in November with about 106 mm. No month averages 150 mm or more.

What is the hottest month in Dublin?

July, with average highs of 18°C (65°F).

How cold does Dublin get?

The coolest nights are in February, averaging 4°C (39°F).

More about Dublin

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Sources

Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.