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Monthly climate in Johnstown Bridge, Ireland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Johnstown Bridge 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 -6 °C (21 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 854 mm (33.6 inches) and receives 155 rainy days on the 1 mm (0.04 inches) threshold annually. Johnstown Bridge enjoys an average of 2718 hours of sunshine throughout the year, and daylight varies from 7 hours 33 minutes to 16 hours 54 minutes per day.

Monthly average temperatures in Johnstown Bridge, Ireland

The warmest months in Johnstown Bridge are June, July and August, with daily mean temperatures ranging from 15 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, Johnstown Bridge experiences 3 days above 25 °C (77.0 °F) and 16 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Johnstown Bridge. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		17°C
(62°F)		17°C
(63°F)		22°C
(71°F)		25°C
(77°F)		28°C
(83°F)		28°C
(83°F)		24°C
(75°F)		25°C
(77°F)		20°C
(69°F)		15°C
(60°F)		14°C
(57°F)
Mean maximum12°C
(54°F)		13°C
(56°F)		15°C
(60°F)		19°C
(66°F)		22°C
(71°F)		23°C
(74°F)		25°C
(78°F)		23°C
(73°F)		22°C
(72°F)		18°C
(64°F)		14°C
(58°F)		13°C
(56°F)
Average high8°C
(46°F)		9°C
(48°F)		10°C
(51°F)		12°C
(54°F)		15°C
(60°F)		18°C
(65°F)		20°C
(68°F)		19°C
(66°F)		17°C
(63°F)		13°C
(56°F)		10°C
(50°F)		8°C
(47°F)
Daily mean6°C
(42°F)		6°C
(43°F)		7°C
(45°F)		9°C
(48°F)		12°C
(53°F)		15°C
(58°F)		16°C
(61°F)		15°C
(60°F)		14°C
(57°F)		11°C
(51°F)		8°C
(46°F)		6°C
(44°F)
Average low3°C
(38°F)		4°C
(39°F)		4°C
(39°F)		5°C
(41°F)		8°C
(46°F)		11°C
(51°F)		13°C
(55°F)		12°C
(55°F)		10°C
(51°F)		8°C
(46°F)		5°C
(42°F)		4°C
(40°F)
Mean minimum-3°C
(27°F)		-1°C
(30°F)		-1°C
(30°F)		-1°C
(31°F)		1°C
(34°F)		6°C
(43°F)		8°C
(47°F)		8°C
(46°F)		5°C
(41°F)		2°C
(35°F)		-0°C
(32°F)		-1°C
(31°F)
Minimum-6°C
(21°F)		-4°C
(25°F)		-5°C
(23°F)		-3°C
(27°F)		-2°C
(30°F)		4°C
(40°F)		6°C
(44°F)		6°C
(44°F)		1°C
(35°F)		-1°C
(30°F)		-2°C
(28°F)		-4°C
(25°F)

Compare climate in Johnstown Bridge with other places

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

Monthly average precipitation in Johnstown Bridge, Ireland

Johnstown Bridge usually has the most precipitation in August, November and December, with an average of 14 rainy days and 86 mm (3.4 inches) of precipitation per month. The driest months in Johnstown Bridge are January, April and May. On average, 54 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Johnstown Bridge. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)51 (2.0)78 (3.1)77 (3.0)45 (1.8)65 (2.6)72 (2.8)68 (2.7)94 (3.7)66 (2.6)74 (2.9)80 (3.2)85 (3.3)
Average precipitation days (≥ 1 mm)91416101013131712141215

Monthly sunshine hours in Johnstown Bridge, Ireland

The sunniest months in Johnstown Bridge are May, June and July, when the sun shines an average of 11 hours 37 minutes a day. Least sunny months in Johnstown Bridge: January, November and December receive an average of 2 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Johnstown Bridge. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours7513617128636135535330126821710784
Mean daily daylight hours8h 6m9h 49m11h 54m14h 2m15h 54m16h 54m16h 22m14h 40m12h 37m10h 30m8h 35m7h 33m

Solar UV radiation in Johnstown Bridge, Ireland

Johnstown Bridge 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 Johnstown Bridge UV Index data.

Average daily maximum UV levels by month for Johnstown Bridge. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124578875321