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Weather & Climate in Ballycastle, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ballycastle experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 41°F in January while summers reach 58°F in July / relatively mild seasonal variation. The area gets 254 sunny days per year, above the national average. Annual precipitation totals 45.1 inches. The city sits at an elevation of 36 feet.
Temperature
41°F Jan (5°C)
58°F Jul (14°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 254 days/yr |
Geography
| Elevation | 36 ft (11 m) |
| Area | 1,043.6 sq mi (2,702.8 km²) |
| Population Density | 5/sq mi |
| Coordinates | 55.2044°N, 6.2430°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| May 3, 1998 | Scotland, United Kingdom | M3.5 | 96 km | 15 km |
| Jan 26, 1990 | 34 km N of Isle of Islay, United Kingdom | M3.0 | 99 km | 10 km |
| Aug 27, 1992 | 33 km NNE of Isle of Islay, United Kingdom | M2.7 | 96 km | 10 km |
| Mar 7, 1998 | 13 km E of Oban, United Kingdom | M2.7 | 148 km | 9 km |
| Nov 1, 2017 | 2 km NNW of Tarbert, United Kingdom | M2.6 | 91 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 720 | HEBRIDES (SCOTLAND) | Questionable Earthquake | - | - | 126 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 5.2 in | Wettest |
| February | 41°F (5°C) | 3.6 in | Coldest |
| March | 43°F (6°C) | 3.9 in | |
| April | 46°F (8°C) | 2.6 in | |
| May | 50°F (10°C) | 2.2 in | Driest |
| June | 54°F (12°C) | 2.4 in | |
| July | 58°F (14°C) | 2.9 in | Warmest |
| August | 58°F (14°C) | 3.4 in | |
| September | 55°F (13°C) | 4.1 in | |
| October | 50°F (10°C) | 4.9 in | |
| November | 45°F (7°C) | 5.0 in | |
| December | 42°F (6°C) | 4.8 in |
Ballycastle has a seasonal temperature swing of 17°F / from 41°F in February to 58°F in July. Total annual precipitation is 45.1 inches, with January being the wettest month (5.2") and May the driest (2.2").