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Monthly climate in Killumney, Ireland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Killumney features a oceanic climate (Cfb). Temperatures typically range between 7 °C (45 °F) and 16 °C (61 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 24 °C (76 °F). The average annual precipitation amounts to about 1095 mm (43.1 inches) and receives 167 rainy days on the 1 mm (0.04 inches) threshold annually. Killumney enjoys an average of 3089 hours of sunshine throughout the year, and daylight varies from 7 hours 50 minutes to 16 hours 36 minutes per day.

Monthly average temperatures in Killumney, Ireland

The warmest months in Killumney are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (57 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 7 to 7 °C (45 - 45 °F) throughout the day. On average each year, Killumney experiences 0 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Killumney. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		13°C
(56°F)		15°C
(58°F)		16°C
(62°F)		21°C
(70°F)		24°C
(75°F)		24°C
(76°F)		23°C
(73°F)		22°C
(72°F)		17°C
(63°F)		15°C
(59°F)		14°C
(57°F)
Mean maximum12°C
(54°F)		12°C
(54°F)		13°C
(56°F)		15°C
(59°F)		18°C
(65°F)		21°C
(69°F)		22°C
(72°F)		20°C
(69°F)		19°C
(67°F)		16°C
(62°F)		14°C
(57°F)		13°C
(55°F)
Average high9°C
(48°F)		9°C
(49°F)		10°C
(50°F)		11°C
(53°F)		14°C
(57°F)		16°C
(62°F)		19°C
(66°F)		18°C
(64°F)		16°C
(61°F)		13°C
(56°F)		11°C
(51°F)		10°C
(50°F)
Daily mean7°C
(45°F)		7°C
(45°F)		7°C
(45°F)		9°C
(48°F)		11°C
(52°F)		14°C
(57°F)		16°C
(61°F)		15°C
(60°F)		14°C
(57°F)		11°C
(53°F)		9°C
(48°F)		8°C
(46°F)
Average low5°C
(41°F)		5°C
(42°F)		5°C
(41°F)		6°C
(44°F)		8°C
(48°F)		11°C
(52°F)		13°C
(56°F)		13°C
(56°F)		11°C
(53°F)		9°C
(49°F)		7°C
(45°F)		6°C
(43°F)
Mean minimum1°C
(33°F)		1°C
(34°F)		1°C
(33°F)		2°C
(35°F)		4°C
(40°F)		7°C
(46°F)		10°C
(50°F)		9°C
(49°F)		7°C
(44°F)		5°C
(41°F)		2°C
(36°F)		2°C
(35°F)
Minimum-2°C
(30°F)		-1°C
(31°F)		-5°C
(24°F)		0°C
(33°F)		3°C
(37°F)		6°C
(42°F)		8°C
(47°F)		8°C
(46°F)		5°C
(41°F)		2°C
(36°F)		1°C
(34°F)		-0°C
(31°F)

Compare climate in Killumney with other places

Compare temperature, precipitation, sunshine, UV index in Killumney, Ireland with other places around the world.

Monthly average precipitation in Killumney, Ireland

Killumney usually has the most precipitation in February, October and December, with an average of 17 rainy days and 123 mm (4.8 inches) of precipitation per month. The driest months in Killumney are January, June and July. On average, 67 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Killumney. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)72 (2.8)125 (4.9)96 (3.8)78 (3.1)80 (3.2)66 (2.6)64 (2.5)90 (3.5)79 (3.1)118 (4.7)102 (4.0)125 (4.9)
Average precipitation days (≥ 1 mm)111817111312111412161418

Monthly sunshine hours in Killumney, Ireland

The sunniest months in Killumney are May, June and July, when the sun shines an average of 12 hours 57 minutes a day. Least sunny months in Killumney: January, February and December receive an average of 3 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Killumney. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours89140201323398388404361302236140101
Mean daily daylight hours8h 21m9h 57m11h 55m13h 55m15h 41m16h 36m16h 6m14h 31m12h 35m10h 35m8h 48m7h 50m

Solar UV radiation in Killumney, Ireland

Killumney experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Killumney UV Index data.

Average daily maximum UV levels by month for Killumney. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124678875421