County Laois climate

Monthly averages for Portlaoise, 2021–2025 · Leinster

Laois is in the centre of the midlands, with the Slieve Bloom Mountains on its western edge catching the heavier rain. The lowlands are drier, with frosty winter nights and warm, settled summer spells.

Rain: about 976 mm falls in a year at Portlaoise, on roughly 165 days, making Laois the 31st wettest of the 32 counties. October is the wettest month (123 mm) and June the driest (62 mm).

Temperature: July is the warmest month, with afternoons averaging 20°C, and January the coldest, with nights averaging 2°C. Frost is rare.

Sunshine: about 2479 hours a year, the 10th sunniest of the 32 counties. June is the sunniest month (10.2 hours a day) and December the dullest (3.3).

Compare Laois with its neighbours →

Rainfall

Average total rainfall each month, in millimetres. 976 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 2479 hours a year.

Laois and its neighbours
County	Rain mm/yr	Rain days	July high	January low	Sun h/yr
Laois	976	165	20°C	2°C	2479
Carlow	985	162	20°C	2°C	2457
Kildare	971	172	20°C	2°C	2476
Kilkenny	1046	164	19°C	2°C	2460
Offaly	1064	178	19°C	2°C	2409
Tipperary	1019	173	19°C	2°C	2457

Recent extremes, 2021–2025

Hottest day: 29.5°C on 12 July 2025
Coldest night: −6.7°C on 9 January 2025
Wettest day: 32.3 mm on 23 November 2024
Wettest month: October 2022, 177 mm
Driest month: February 2023, 17 mm

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

Portlaoise month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	7	2	80	11	4.0	15
February	9	4	81	14	4.2	18
March	11	4	79	14	6.1	15
April	13	5	66	13	8.5	13
May	16	8	79	15	10.1	12
June	18	10	62	12	10.2	13
July	20	12	87	15	9.1	12
August	20	12	62	12	9.2	13
September	17	10	97	14	7.1	13
October	14	8	123	17	5.4	15
November	10	5	78	14	4.1	15
December	8	4	82	14	3.3	17
Year	14	7	976	165	2479 h	14

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.

Bordering counties: Carlow · Kildare · Kilkenny · Offaly · Tipperary. All counties: rainfall, temperature, sunshine.