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Monthly climate in Ballycastle, Northern Ireland, United Kingdom

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Ballycastle features a oceanic climate (Cfb). Temperatures typically range between 7 °C (44 °F) and 14 °C (57 °F) through the year, but rarely can drop to -1 °C (31 °F) or can rise to as high as 19 °C (66 °F). The average annual precipitation amounts to about 1421 mm (55.9 inches) and receives 213 rainy days on the 1 mm (0.04 inches) threshold annually. Ballycastle enjoys an average of 3048 hours of sunshine throughout the year, and daylight varies from 7 hours 12 minutes to 17 hours 18 minutes per day.

Monthly average temperatures in Ballycastle, Northern Ireland, United Kingdom §

The warmest months in Ballycastle are July, August and September, with daily mean temperatures ranging from 13 to 14 °C (56 - 57 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 7 to 7 °C (44 - 45 °F) throughout the day. On average each year, Ballycastle experiences 0 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ballycastle, Northern Ireland, United Kingdom. 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 13°C
(56°F)		 12°C
(54°F)		 12°C
(54°F)		 13°C
(55°F)		 15°C
(60°F)		 16°C
(62°F)		 19°C
(66°F)		 18°C
(64°F)		 17°C
(64°F)		 16°C
(62°F)		 14°C
(58°F)		 12°C
(54°F)
Mean maximum 11°C
(53°F)		 11°C
(52°F)		 11°C
(52°F)		 11°C
(53°F)		 14°C
(57°F)		 15°C
(59°F)		 17°C
(64°F)		 17°C
(63°F)		 17°C
(63°F)		 15°C
(60°F)		 14°C
(57°F)		 12°C
(54°F)
Average high 8°C
(47°F)		 8°C
(46°F)		 8°C
(47°F)		 9°C
(48°F)		 11°C
(51°F)		 13°C
(55°F)		 14°C
(58°F)		 15°C
(59°F)		 14°C
(58°F)		 13°C
(55°F)		 11°C
(51°F)		 9°C
(49°F)
Daily mean 7°C
(45°F)		 7°C
(44°F)		 7°C
(44°F)		 8°C
(46°F)		 10°C
(50°F)		 12°C
(53°F)		 13°C
(56°F)		 14°C
(57°F)		 13°C
(56°F)		 12°C
(53°F)		 10°C
(49°F)		 8°C
(47°F)
Average low 6°C
(43°F)		 5°C
(42°F)		 6°C
(42°F)		 7°C
(45°F)		 9°C
(48°F)		 11°C
(52°F)		 13°C
(55°F)		 13°C
(56°F)		 13°C
(55°F)		 11°C
(52°F)		 9°C
(48°F)		 7°C
(45°F)
Mean minimum 2°C
(37°F)		 2°C
(36°F)		 3°C
(37°F)		 4°C
(39°F)		 6°C
(44°F)		 9°C
(49°F)		 11°C
(52°F)		 12°C
(53°F)		 10°C
(51°F)		 8°C
(47°F)		 6°C
(43°F)		 4°C
(39°F)
Minimum 2°C
(36°F)		 1°C
(34°F)		 -1°C
(31°F)		 2°C
(37°F)		 5°C
(41°F)		 8°C
(47°F)		 11°C
(52°F)		 10°C
(51°F)		 9°C
(49°F)		 6°C
(43°F)		 4°C
(40°F)		 2°C
(36°F)

Compare climate in Ballycastle with other places

Compare temperature, precipitation, sunshine, UV index in Ballycastle, Northern Ireland, United Kingdom with other places around the world.

Monthly average precipitation in Ballycastle, Northern Ireland, United Kingdom §

Ballycastle usually has the most precipitation in October, November and December, with an average of 23 rainy days and 164 mm (6.5 inches) of precipitation per month. The driest months in Ballycastle are April, May and June. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ballycastle, Northern Ireland, United Kingdom. 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) 121 (4.7) 138 (5.4) 106 (4.2) 47 (1.9) 69 (2.7) 98 (3.8) 105 (4.1) 132 (5.2) 112 (4.4) 160 (6.3) 167 (6.6) 166 (6.5)
Average precipitation days (≥ 1 mm) 17 18 17 10 11 16 16 19 19 24 23 23

Monthly sunshine hours in Ballycastle, Northern Ireland, United Kingdom §

The sunniest months in Ballycastle are May, June and July, when the sun shines an average of 13 hours 11 minutes a day. Least sunny months in Ballycastle: January, November and December receive an average of 2 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ballycastle, Northern Ireland, United Kingdom. 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 73 147 211 325 407 396 410 360 289 225 117 82
Mean daily daylight hours 7h 48m 9h 39m 11h 53m 14h 11m 16h 13m 17h 18m 16h 43m 14h 52m 12h 39m 10h 23m 8h 20m 7h 12m

Solar UV radiation in Ballycastle, Northern Ireland, United Kingdom §

Ballycastle experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 6 - 8, which corresponds to the High / Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Ballycastle UV Index data.

Average daily maximum UV levels by month for Ballycastle, Northern Ireland, United Kingdom. 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 3 5 6 8 8 6 5 3 1 1

Detailed Monthly Weather Insights for Ballycastle, Northern Ireland, United Kingdom

Discover in-depth weather details for every month in Ballycastle. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Ballycastle's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.