Climate almanac
Londonderry County Borough
Northern Ireland, United Kingdom · 55.00°, -7.31°
What is the climate like in Londonderry County Borough?
The best time to visit Londonderry County Borough is typically May, the year's most comfortable month (5.4/10). Londonderry County Borough is warmest in July, when daily highs average 64°F (18°C), and coolest in January, when lows fall to about 38°F (3°C). The wettest month is typically August and the driest is April; the year sees roughly 44 in (1110 mm) of precipitation.
- Best time to visitMay — the year's comfort peak (5.4/10)
- Warmest monthJuly — average high 64°F (18°C)
- Coolest monthJanuary — average low 38°F (3°C)
- Wettest monthAugust (4.5 in (115 mm))
- Driest monthApril (3.0 in (77 mm))
- Annual precipitation44 in (1110 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromMalin Head, 42 km away (1929-2026)