County Dublin climate

Monthly averages for Dublin, 2021–2025 · Leinster

Dublin is in the rain shadow of the Wicklow Mountains and the western hills, which makes the east coast the driest part of Ireland. Sea breezes keep summer afternoons cooler on the coast than inland.

Rain: about 1000 mm falls in a year at Dublin, on roughly 162 days, making Dublin the 28th wettest of the 32 counties. October is the wettest month (121 mm) and May the driest (67 mm).

Temperature: July is the warmest month, with afternoons averaging 20°C, and January the coldest, with nights averaging 3°C. Frost is rare.

Sunshine: about 2750 hours a year, the 2nd sunniest of the 32 counties. June is the sunniest month (11.7 hours a day) and December the dullest (3.4).

Compare Dublin with its neighbours →

Rainfall

Average total rainfall each month, in millimetres. 1000 mm a year.

Temperature

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

Sunshine

Hours of sunshine on an average day in each month. About 2750 hours a year.

Dublin and its neighbours
County	Rain mm/yr	Rain days	July high	January low	Sun h/yr
Dublin	1000	162	20°C	3°C	2750
Kildare	971	172	20°C	2°C	2476
Meath	978	169	20°C	2°C	2506
Wicklow	1132	168	19°C	3°C	2716

Recent extremes, 2021–2025

Hottest day: 27.3°C on 18 July 2022
Coldest night: −3.2°C on 9 January 2025
Wettest day: 50.4 mm on 21 July 2025
Wettest month: October 2021, 156 mm
Driest month: January 2022, 16 mm

Ireland's all-time records are on the records page.

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
Year	14	8	1000	162	2750 h	17

Figures are averages for 2021–2025 at each county town, from the ERA5 weather reanalysis via Open-Meteo. They describe typical lowland weather in each county; hills and exposed coasts are wetter and windier.