January in Korydallós averages a daily high of 13.8°C with nights around 6.9°C. Expect roughly 7.4 wet days totalling 46.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Korydallós is April–May.
Based on HELLINIKON, GR (13km), 1995–2024. 21 years of January data.