County Armagh climate

Monthly averages for Armagh, 2021–2025 · Ulster

Armagh, the orchard county, is low-lying around Lough Neagh and one of the drier, warmer parts of Ulster in summer, which is why apples grow well here. The Ring of Gullion in the south is cooler and wetter.

Rain: about 1008 mm falls in a year at Armagh, on roughly 177 days, making Armagh the 27th wettest of the 32 counties. October is the wettest month (108 mm) and January the driest (60 mm).

Temperature: July is the warmest month, with afternoons averaging 19°C, and January the coldest, with nights averaging 2°C. Frost is rare.

Sunshine: about 2433 hours a year, the 17th sunniest of the 32 counties. June is the sunniest month (10.2 hours a day) and December the dullest (2.8).

Compare Armagh with its neighbours →

Rainfall

Average total rainfall each month, in millimetres. 1008 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 2433 hours a year.

Armagh and its neighbours
County	Rain mm/yr	Rain days	July high	January low	Sun h/yr
Armagh	1008	177	19°C	2°C	2433
Antrim	1047	175	19°C	2°C	2637
Down	1071	168	18°C	3°C	2679
Louth	1063	172	19°C	2°C	2524
Monaghan	1064	185	19°C	2°C	2375
Tyrone	1200	200	18°C	2°C	2255

Recent extremes, 2021–2025

Hottest day: 29.7°C on 12 July 2025
Coldest night: −5.7°C on 8 January 2025
Wettest day: 34.6 mm on 22 July 2023
Wettest month: July 2023, 202 mm
Driest month: February 2023, 23 mm

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

Armagh month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	7	2	60	11	3.9	16
February	9	4	75	14	4.1	19
March	11	3	76	14	6.0	15
April	12	4	75	15	8.5	13
May	16	7	78	16	10.0	13
June	18	10	73	13	10.2	14
July	19	12	99	17	8.9	12
August	19	12	90	16	9.2	14
September	17	10	103	15	7.2	14
October	14	8	108	17	4.9	16
November	10	5	83	14	4.1	16
December	8	4	88	14	2.8	18
Year	13	7	1008	177	2433 h	15

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: Antrim · Down · Louth · Monaghan · Tyrone. All counties: rainfall, temperature, sunshine.