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Monthly climate in Portlaoise, Leinster, Ireland

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Portlaoise features a oceanic climate (Cfb).Temperatures typically range between 6 °C (42 °F) and 16 °C (61 °F) through the year, but rarely can drop to -8 °C (18 °F) or can rise to as high as 29 °C (84 °F).The average annual precipitation amounts to about 905 mm (35.6 inches) and receives 161 rainy days on the 1 mm (0.04 inches) threshold annually.Portlaoise enjoys an average of 2773 hours of sunshine throughout the year, and daylight varies from 7 hours 38 minutes to 16 hours 48 minutes per day.

Monthly average temperatures in Portlaoise, Leinster, Ireland §

The warmest months in Portlaoise are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (58 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 6 °C (42 - 44 °F) throughout the day. On average each year, Portlaoise experiences 2 days above 25 °C (77.0 °F) and 22 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Portlaoise, Leinster, Ireland.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(57°F)		 15°C
(60°F)		 17°C
(63°F)		 21°C
(69°F)		 23°C
(74°F)		 28°C
(83°F)		 29°C
(84°F)		 24°C
(75°F)		 26°C
(79°F)		 19°C
(67°F)		 15°C
(60°F)		 14°C
(57°F)
Mean maximum 12°C
(54°F)		 13°C
(55°F)		 15°C
(60°F)		 18°C
(64°F)		 21°C
(70°F)		 22°C
(73°F)		 24°C
(76°F)		 23°C
(73°F)		 22°C
(71°F)		 17°C
(63°F)		 14°C
(58°F)		 13°C
(55°F)
Average high 8°C
(46°F)		 9°C
(48°F)		 10°C
(50°F)		 12°C
(54°F)		 15°C
(60°F)		 18°C
(64°F)		 20°C
(67°F)		 18°C
(65°F)		 17°C
(62°F)		 13°C
(56°F)		 10°C
(50°F)		 8°C
(47°F)
Daily mean 6°C
(42°F)		 6°C
(43°F)		 7°C
(44°F)		 9°C
(48°F)		 11°C
(53°F)		 14°C
(58°F)		 16°C
(61°F)		 15°C
(60°F)		 13°C
(56°F)		 10°C
(51°F)		 8°C
(46°F)		 6°C
(44°F)
Average low 3°C
(38°F)		 3°C
(38°F)		 3°C
(38°F)		 5°C
(41°F)		 7°C
(46°F)		 10°C
(51°F)		 12°C
(55°F)		 12°C
(54°F)		 10°C
(50°F)		 8°C
(46°F)		 5°C
(41°F)		 4°C
(40°F)
Mean minimum -3°C
(26°F)		 -2°C
(29°F)		 -2°C
(28°F)		 -2°C
(29°F)		 1°C
(34°F)		 6°C
(42°F)		 8°C
(46°F)		 7°C
(46°F)		 4°C
(39°F)		 1°C
(34°F)		 -1°C
(30°F)		 -2°C
(28°F)
Minimum -5°C
(23°F)		 -4°C
(25°F)		 -8°C
(18°F)		 -3°C
(27°F)		 -1°C
(30°F)		 4°C
(40°F)		 5°C
(42°F)		 6°C
(43°F)		 -0°C
(32°F)		 -2°C
(28°F)		 -2°C
(28°F)		 -7°C
(20°F)

Compare climate in Portlaoise with other places

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

Monthly average precipitation in Portlaoise, Leinster, Ireland §

Portlaoise usually has the most precipitation in February, August and December, with an average of 15 rainy days and 93 mm (3.7 inches) of precipitation per month.The driest months in Portlaoise are January, April and May. On average, 57 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portlaoise, Leinster, Ireland.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 56 (2.2) 88 (3.4) 81 (3.2) 50 (2.0) 66 (2.6) 68 (2.7) 69 (2.7) 94 (3.7) 66 (2.6) 87 (3.4) 84 (3.3) 98 (3.8)
Average precipitation days (≥ 1 mm) 11 15 16 10 12 13 12 16 12 15 13 16

Monthly sunshine hours in Portlaoise, Leinster, Ireland §

The sunniest months in Portlaoise are May, June and July, when the sun shines an average of 11 hours 55 minutes a day.Least sunny months in Portlaoise: January, November and December receive an average of 3 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portlaoise, Leinster, Ireland.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 79 134 173 279 369 363 365 308 274 223 113 89
Mean daily daylight hours 8h 11m 9h 51m 11h 54m 14h 0m 15h 50m 16h 48m 16h 17m 14h 38m 12h 36m 10h 32m 8h 39m 7h 38m

Solar UV radiation in Portlaoise, Leinster, Ireland §

Portlaoise 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 Portlaoise UV Index data.

Average daily maximum UV levels by month for Portlaoise, Leinster, Ireland.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 1 2 4 5 7 8 8 7 5 3 2 1