January in Londonderry County Borough averages a daily high of 8.3°C with nights around 3.9°C. Expect roughly 22.4 wet days totalling 117.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Londonderry County Borough is June–September.
Based on MALIN HEAD, EI (41.7km), 1995–2024. 22 years of January data.