Ireland climate

Monthly averages for Dublin, 2021–2025

In Dublin, the warmest month is July, with an average high of 20°C, and the coldest is January, when nights average 3°C.

About 1000 mm of rain falls in a year, on roughly 162 days. October is the wettest month (121 mm) and May the driest (67 mm).

Wind is strongest in February (21 km/h on average) and lightest in May (14 km/h).

The hottest day in 2021–2025 reached 27.3°C (18 July 2022), and the coldest night fell to −3.2°C (9 January 2025).

For the picture county by county, see the county climate pages.

Temperature

Bars run from the average night-time low to the average daytime high, in °C.

Average total rainfall each month, in millimetres.

Average wind speed at 10 metres each month, in km/h.

Dublin month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	8	3	71	12	4.3	18
February	10	5	69	13	4.6	21
March	11	5	79	13	7.0	17
April	12	6	81	12	9.4	15
May	15	9	67	13	11.2	14
June	18	12	71	13	11.7	14
July	20	13	92	15	10.2	14
August	20	13	72	13	10.2	15
September	17	12	107	14	8.0	15
October	15	10	121	17	5.9	17
November	11	7	81	12	4.3	18
December	10	5	89	14	3.4	19