January in Dublin averages a daily high of 14.6°C with nights around 3.5°C. Expect roughly 9.8 wet days totalling 62.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dublin is April–June.
Based on LIVERMORE MUNICIPAL AIRPORT, CA US (10.7km), 1995–2024. 26 years of January data.